| 9ef1c2d9 |
1 | c------------------------------------------------------------------------ |
| 2 | function ffsigiut(xx1,xx2,jpp,je1,je2) |
| 3 | c------------------------------------------------------------------------ |
| 4 | c |
| 5 | c \int(dt) \int(du) ffsig *s/sh**3 *2*pi*alpha**2 *delta(uh+th+sh) |
| 6 | c |
| 7 | c----------------------------------------------------------------------- |
| 8 | common /ar3/ x1(7),a1(7) |
| 9 | include 'epos.incsem' |
| 10 | include 'epos.inc' |
| 11 | double precision tmin,tmax,t,sh2,sqrtq2s |
| 12 | |
| 13 | ig=3 |
| 14 | s=engy**2 |
| 15 | sh=s*xx1*xx2 |
| 16 | ffsigiut=0. |
| 17 | if(sh.le.4.*q2min)return |
| 18 | sh2=dble(sh/2.) |
| 19 | c tmin=sh/2-sqrt(sh*sh/4-q2min*sh) |
| 20 | sqrtq2s=sqrt(dble(q2min*sh)) |
| 21 | tmin=sh2-sqrt((sh2-sqrtq2s)*(sh2+sqrtq2s)) |
| 22 | tmax=sh2 |
| 23 | do i=1,ig |
| 24 | do m=1,2 |
| 25 | t=2d0*tmin/(1d0+tmin/tmax-dble(tgss(ig,i)*(2*m-3)) |
| 26 | & *(1d0-tmin/tmax)) |
| 27 | qq=sngl(t*(1d0-t/dble(sh))) |
| 28 | ft=ffsigj(sngl(t),qq,xx1,xx2,jpp,je1,je2)/sh**3 |
| 29 | * * (2*pi*pssalf(qq/qcdlam))**2 |
| 30 | ffsigiut=ffsigiut+wgss(ig,i)*ft*sngl(t)**2 |
| 31 | enddo |
| 32 | enddo |
| 33 | ffsigiut=ffsigiut |
| 34 | * *0.5*sngl(1d0/tmin-1d0/tmax) |
| 35 | * *2*pi*s |
| 36 | * /2 !CS for parton pair |
| 37 | return |
| 38 | end |
| 39 | |
| 40 | c----------------------------------------------------------------------- |
| 41 | function ffsigj(t,qt,x1,x2,jpp,je1,je2) |
| 42 | c----------------------------------------------------------------------- |
| 43 | c |
| 44 | c \sum x1*f_i(x1,qt) * x2*f_k(x2,qt) * B_ik |
| 45 | c |
| 46 | c B_ik = psbori = contribution to Born xsection: |
| 47 | c dsigmaBorn/d2pt/dy |
| 48 | c = s/pi * delta(s+t+u) * 2*pi*alpha**2 /s**2 * B_ik |
| 49 | c |
| 50 | c qt = virtuality scale |
| 51 | c x1, x2 = light cone momentum fractions |
| 52 | c |
| 53 | c x*f_j(x,qt) = function fparton(x,qt,j) |
| 54 | c |
| 55 | c----------------------------------------------------------------------- |
| 56 | c jpp: type of Pomeron |
| 57 | c 1 ... sea-sea |
| 58 | c 2 ... val-sea |
| 59 | c 3 ... sea-val |
| 60 | c 4 ... val-val |
| 61 | c 5 ... all |
| 62 | c je = emission type |
| 63 | c 0 ... no emissions |
| 64 | c 1 ... emissions |
| 65 | c 2 ... all |
| 66 | c----------------------------------------------------------------------- |
| 67 | include 'epos.incsem' |
| 68 | include 'epos.inc' |
| 69 | |
| 70 | s=engy**2*x1*x2 |
| 71 | |
| 72 | if(jpp.ne.5)then |
| 73 | ji1=mod(jpp+1,2)+1 |
| 74 | ji2=(jpp+1)/2 |
| 75 | sea1=pifpartone(x1,qt,-1,je1,ji1) |
| 76 | g1= pifpartone(x1,qt, 0,je1,ji1) |
| 77 | uv1= pifpartone(x1,qt, 1,je1,ji1) |
| 78 | dv1= pifpartone(x1,qt, 2,je1,ji1) |
| 79 | sea2=pifpartone(x2,qt,-1,je2,ji2) |
| 80 | g2= pifpartone(x2,qt, 0,je2,ji2) |
| 81 | uv2= pifpartone(x2,qt, 1,je2,ji2) |
| 82 | dv2= pifpartone(x2,qt, 2,je2,ji2) |
| 83 | else |
| 84 | sea1=pifpartone(x1,qt,-1,je1,1)+pifpartone(x1,qt,-1,je1,2) |
| 85 | g1= pifpartone(x1,qt, 0,je1,1)+pifpartone(x1,qt, 0,je1,2) |
| 86 | uv1= pifpartone(x1,qt, 1,je1,1)+pifpartone(x1,qt, 1,je1,2) |
| 87 | dv1= pifpartone(x1,qt, 2,je1,1)+pifpartone(x1,qt, 2,je1,2) |
| 88 | sea2=pifpartone(x2,qt,-1,je2,1)+pifpartone(x2,qt,-1,je2,2) |
| 89 | g2= pifpartone(x2,qt, 0,je2,1)+pifpartone(x2,qt, 0,je2,2) |
| 90 | uv2= pifpartone(x2,qt, 1,je2,1)+pifpartone(x2,qt, 1,je2,2) |
| 91 | dv2= pifpartone(x2,qt, 2,je2,1)+pifpartone(x2,qt, 2,je2,2) |
| 92 | endif |
| 93 | |
| 94 | ffsigj= ffborn(s,t, g1*g2 !gg |
| 95 | |
| 96 | * ,(uv1+dv1+2.*naflav*sea1)*g2+g1*(uv2+dv2+2.*naflav*sea2) !gq |
| 97 | |
| 98 | * ,(uv1+sea1)*(uv2+sea2) !qq |
| 99 | * +(dv1+sea1)*(dv2+sea2)+sea1*sea2*(naflav-1)*2. |
| 100 | |
| 101 | * ,(uv1+sea1)*sea2+(uv2+sea2)*sea1 !qa |
| 102 | * +(dv1+sea1)*sea2+(dv2+sea2)*sea1+sea1*sea2*(naflav-2)*2. |
| 103 | |
| 104 | * ,dv1*uv2+dv2*uv1+(uv2+dv2)*sea1*(naflav-1)*2. !qqp |
| 105 | * +(uv1+dv1)*sea2*(naflav-1)*2. |
| 106 | * +sea1*sea2*naflav*(naflav-1)*4. |
| 107 | |
| 108 | *) |
| 109 | end |
| 110 | |
| 111 | c----------------------------------------------------------------------- |
| 112 | function ffsig(t,qt,x1,x2) !former psjy |
| 113 | c----------------------------------------------------------------------- |
| 114 | include 'epos.incsem' |
| 115 | include 'epos.inc' |
| 116 | |
| 117 | s=engy**2*x1*x2 |
| 118 | |
| 119 | g1= pifpartone(x1,qt, 0,2,1)+pifpartone(x1,qt, 0,2,2) |
| 120 | uv1= pifpartone(x1,qt, 1,2,1)+pifpartone(x1,qt, 1,2,2) |
| 121 | dv1= pifpartone(x1,qt, 2,2,1)+pifpartone(x1,qt, 2,2,2) |
| 122 | sea1=pifpartone(x1,qt,-1,2,1)+pifpartone(x1,qt,-1,2,2) |
| 123 | g2= pifpartone(x2,qt, 0,2,1)+pifpartone(x2,qt, 0,2,2) |
| 124 | uv2= pifpartone(x2,qt, 1,2,1)+pifpartone(x2,qt, 1,2,2) |
| 125 | dv2= pifpartone(x2,qt, 2,2,1)+pifpartone(x2,qt, 2,2,2) |
| 126 | sea2=pifpartone(x2,qt,-1,2,1)+pifpartone(x2,qt,-1,2,2) |
| 127 | |
| 128 | ffsig= ffborn(s,t, g1*g2 !gg |
| 129 | |
| 130 | * ,(uv1+dv1+2.*naflav*sea1)*g2+g1*(uv2+dv2+2.*naflav*sea2) !gq |
| 131 | |
| 132 | * ,(uv1+sea1)*(uv2+sea2) !qq |
| 133 | * +(dv1+sea1)*(dv2+sea2)+sea1*sea2*(naflav-1)*2. |
| 134 | |
| 135 | * ,(uv1+sea1)*sea2+(uv2+sea2)*sea1 !qa |
| 136 | * +(dv1+sea1)*sea2+(dv2+sea2)*sea1+sea1*sea2*(naflav-2)*2. |
| 137 | |
| 138 | * ,dv1*uv2+dv2*uv1+(uv2+dv2)*sea1*(naflav-1)*2. !qqp |
| 139 | * +(uv1+dv1)*sea2*(naflav-1)*2. |
| 140 | * +sea1*sea2*naflav*(naflav-1)*4. |
| 141 | |
| 142 | *) |
| 143 | end |
| 144 | |
| 145 | c------------------------------------------------------------------------ |
| 146 | function ffborn(s,t,gg,gq,qq,qa,qqp) |
| 147 | c------------------------------------------------------------------------ |
| 148 | |
| 149 | ffborn= |
| 150 | *( psbori(s,t,0,0,1)+psbori(s,s-t,0,0,1) |
| 151 | * +psbori(s,t,0,0,2)+psbori(s,s-t,0,0,2)) /2. *gg !gg |
| 152 | |
| 153 | *+(psbori(s,t,0,1,1)+psbori(s,s-t,0,1,1)) *gq !gq |
| 154 | |
| 155 | *+(psbori(s,t,1,1,1)+psbori(s,s-t,1,1,1))/2. *qq !qq |
| 156 | |
| 157 | *+(psbori(s,t,1,-1,1)+psbori(s,s-t,1,-1,1)+psbori(s,t,1,-1,2)+ |
| 158 | * psbori(s,s-t,1,-1,2)+psbori(s,t,1,-1,3)+psbori(s,s-t,1,-1,3)) !qa |
| 159 | * *qa |
| 160 | |
| 161 | *+(psbori(s,t,1,2,1)+psbori(s,s-t,1,2,1)) *qqp !qq' |
| 162 | |
| 163 | end |
| 164 | |
| 165 | c----------------------------------------------------------------------- |
| 166 | function pifpartone(xx,qq,j,je,ji) ! pol interpolation of partone |
| 167 | c----------------------------------------------------------------------- |
| 168 | include 'epos.incsem' |
| 169 | include 'epos.inc' |
| 170 | common/tabfptn/kxxmax,kqqmax,fptn(20,20,-1:2,0:2,2) |
| 171 | real wi(3),wj(3) |
| 172 | common /cpifpartone/npifpartone |
| 173 | data npifpartone /0/ |
| 174 | npifpartone=npifpartone+1 |
| 175 | if(npifpartone.eq.1)call MakeFpartonTable |
| 176 | |
| 177 | qqmax=engy**2/4. |
| 178 | xxmin=0.01/engy |
| 179 | xxmax=1 |
| 180 | |
| 181 | xxk=1.+log(xx/xxmin)/log(xxmax/xxmin)*(kxxmax-1) |
| 182 | qqk=1.+log(qq/q2min)/log(qqmax/q2min)*(kqqmax-1) |
| 183 | kxx=int(xxk) |
| 184 | kqq=int(qqk) |
| 185 | if(kxx.lt.1)kxx=1 |
| 186 | if(kqq.lt.1)kqq=1 |
| 187 | if(kxx.gt.(kxxmax-2))kxx=kxxmax-2 |
| 188 | if(kqq.gt.(kqqmax-2))kqq=kqqmax-2 |
| 189 | |
| 190 | wi(2)=xxk-kxx |
| 191 | wi(3)=wi(2)*(wi(2)-1.)*.5 |
| 192 | wi(1)=1.-wi(2)+wi(3) |
| 193 | wi(2)=wi(2)-2.*wi(3) |
| 194 | |
| 195 | wj(2)=qqk-kqq |
| 196 | wj(3)=wj(2)*(wj(2)-1.)*.5 |
| 197 | wj(1)=1.-wj(2)+wj(3) |
| 198 | wj(2)=wj(2)-2.*wj(3) |
| 199 | pifpartone=0 |
| 200 | do kx=1,3 |
| 201 | do kq=1,3 |
| 202 | pifpartone=pifpartone+fptn(kxx+kx-1,kqq+kq-1,j,je,ji) |
| 203 | * *wi(kx)*wj(kq) |
| 204 | enddo |
| 205 | enddo |
| 206 | end |
| 207 | |
| 208 | c----------------------------------------------------------------------- |
| 209 | subroutine MakeFpartonTable |
| 210 | c----------------------------------------------------------------------- |
| 211 | include 'epos.incsem' |
| 212 | include 'epos.inc' |
| 213 | common/tabfptn/kxxmax,kqqmax,fptn(20,20,-1:2,0:2,2) |
| 214 | write (*,'(a,$)')'(Fparton table' |
| 215 | kxxmax=10 |
| 216 | kqqmax=10 |
| 217 | qqmax=engy**2/4. |
| 218 | xxmin=0.01/engy |
| 219 | xxmax=1 |
| 220 | do ji=1,2 |
| 221 | do je=0,2 |
| 222 | write(*,'(a,$)')'.' |
| 223 | do j=-1,2 |
| 224 | do kxx=1,kxxmax |
| 225 | xx=xxmin*(xxmax/xxmin)**((kxx-1.)/(kxxmax-1.)) |
| 226 | do kqq=1,kqqmax |
| 227 | qq=q2min*(qqmax/q2min)**((kqq-1.)/(kqqmax-1.)) |
| 228 | fptn(kxx,kqq,j,je,ji)= fpartone(xx,qq,j,je,ji) |
| 229 | enddo |
| 230 | enddo |
| 231 | enddo |
| 232 | enddo |
| 233 | enddo |
| 234 | write (*,'(a,$)')'done)' |
| 235 | end |
| 236 | |
| 237 | c------------------------------------------------------------------------ |
| 238 | function fpartone(xx,qq,j,je,ji) !former pspdf0 (sha) |
| 239 | c----------------------------------------------------------------------- |
| 240 | c |
| 241 | c parton distribution function for proton ( actually x*f(x) !!!!!!! ) |
| 242 | c |
| 243 | c xx = light cone momentum fraction |
| 244 | c qq = virtuality scale |
| 245 | c j = parton type |
| 246 | c -1 ... sea (distribution function per flavor) |
| 247 | c 0 ... g |
| 248 | c 1 ... u |
| 249 | c 2 ... d |
| 250 | c je = emission type |
| 251 | c 0 ... no emissions |
| 252 | c 1 ... emissions |
| 253 | c 2 ... all |
| 254 | c ji = initial parton type |
| 255 | c 1 ... sea (q et g) |
| 256 | c 2 ... val |
| 257 | c----------------------------------------------------------------------- |
| 258 | double precision z,xmin,xm,zx,psuds |
| 259 | common/ar3/ x1(7),a1(7) |
| 260 | include 'epos.inc' |
| 261 | include 'epos.incsem' |
| 262 | |
| 263 | fpartone=0 |
| 264 | if(je.eq.1)goto888 |
| 265 | |
| 266 | c ...... f_0 * sudakov......... |
| 267 | |
| 268 | if(j.eq.0.and.ji.eq.1)then |
| 269 | fpartone=fzeroGlu(xx,2,1) !hadron class 2, projectile side |
| 270 | elseif((j.eq.1.or.j.eq.2).and.ji.eq.2)then |
| 271 | fpartone=psdfh4(xx,q2min,0.,2,j) |
| 272 | elseif(j.eq.-1.and.ji.eq.1)then |
| 273 | fpartone=fzeroSea(xx,2,1) |
| 274 | endif |
| 275 | fpartone=fpartone*sngl(psuds(qq,j)/psuds(q2min,j)) |
| 276 | if(je.eq.0)goto999 |
| 277 | |
| 278 | c......... integral f_0 E_qcd............ |
| 279 | |
| 280 | 888 continue |
| 281 | xmin=dble(xx)/(1.d0-dble(q2ini/qq)) |
| 282 | if(xmin.lt.1.d0)then |
| 283 | dpd1=0. |
| 284 | dpd2=0. |
| 285 | xm=max(xmin,0.3d0) |
| 286 | |
| 287 | !numerical integration xm -> 1 |
| 288 | |
| 289 | do i=1,7 |
| 290 | do m=1,2 |
| 291 | zx=1.d0-(1.d0-xm)*(.5d0+(dble(m)-1.5d0)*dble(x1(i)))**.25d0 |
| 292 | z=xx/zx |
| 293 | |
| 294 | gl=fzeroGlu(sngl(zx),2,1) |
| 295 | uv=psdfh4(sngl(zx),q2min,0.,2,1) |
| 296 | dv=psdfh4(sngl(zx),q2min,0.,2,2) |
| 297 | sea=fzeroSea(sngl(zx),2,1) |
| 298 | |
| 299 | fz=0 |
| 300 | if(j.eq.0)then |
| 301 | if(ji.eq.1) |
| 302 | * fz=gl *psevi(q2min,qq,z,1,1) |
| 303 | * +sea*psevi(q2min,qq,z,2,1) !ccccc |
| 304 | if(ji.eq.2) |
| 305 | * fz=(uv+dv)*psevi(q2min,qq,z,2,1) |
| 306 | elseif(j.eq.1.and.ji.eq.2)then |
| 307 | fz=psevi(q2min,qq,z,3,2)*uv |
| 308 | elseif(j.eq.2.and.ji.eq.2)then |
| 309 | fz=psevi(q2min,qq,z,3,2)*dv |
| 310 | elseif(j.eq.-1)then |
| 311 | akns=psevi(q2min,qq,z,3,2) !nonsinglet contribution |
| 312 | aks=(psevi(q2min,qq,z,2,2)-akns) !singlet contribution |
| 313 | if(ji.eq.1) |
| 314 | * fz=psevi(q2min,qq,z,1,2)*gl |
| 315 | * +sea*aks+sea*akns !ccccc |
| 316 | if(ji.eq.2) |
| 317 | * fz=(uv+dv)*aks |
| 318 | endif |
| 319 | dpd1=dpd1+a1(i)*fz/sngl(zx)**2/sngl(1.d0-zx)**3 |
| 320 | enddo |
| 321 | enddo |
| 322 | dpd1=dpd1*sngl(1.d0-xm)**4/8.*xx |
| 323 | |
| 324 | !numerical integration xmin -> xm |
| 325 | |
| 326 | if(xm.gt.xmin)then |
| 327 | do i=1,7 |
| 328 | do m=1,2 |
| 329 | zx=xx+(xm-xx) |
| 330 | & *((xmin-xx)/(xm-xx))**(.5d0-(dble(m)-1.5d0)*dble(x1(i))) |
| 331 | z=xx/zx |
| 332 | |
| 333 | gl=fzeroGlu(sngl(zx),2,1) |
| 334 | uv=psdfh4(sngl(zx),q2min,0.,2,1) |
| 335 | dv=psdfh4(sngl(zx),q2min,0.,2,2) |
| 336 | sea=fzeroSea(sngl(zx),2,1) |
| 337 | |
| 338 | fz=0 |
| 339 | if(j.eq.0)then |
| 340 | if(ji.eq.1) |
| 341 | * fz=gl *psevi(q2min,qq,z,1,1) |
| 342 | * +sea*psevi(q2min,qq,z,2,1) !ccccc |
| 343 | if(ji.eq.2) |
| 344 | * fz=(uv+dv)*psevi(q2min,qq,z,2,1) |
| 345 | elseif(j.eq.1.and.ji.eq.2)then |
| 346 | fz=psevi(q2min,qq,z,3,2)*uv |
| 347 | elseif(j.eq.2.and.ji.eq.2)then |
| 348 | fz=psevi(q2min,qq,z,3,2)*dv |
| 349 | elseif(j.eq.-1)then |
| 350 | akns=psevi(q2min,qq,z,3,2) !nonsinglet contribution |
| 351 | aks=(psevi(q2min,qq,z,2,2)-akns) !singlet contribution |
| 352 | if(ji.eq.1) |
| 353 | * fz=psevi(q2min,qq,z,1,2)*gl |
| 354 | * +sea*aks+sea*akns !ccccc |
| 355 | if(ji.eq.2) |
| 356 | * fz=(uv+dv)*aks |
| 357 | endif |
| 358 | dpd2=dpd2+a1(i)*fz*sngl((1.d0-xx/zx)/zx) |
| 359 | enddo |
| 360 | enddo |
| 361 | dpd2=dpd2*sngl(log((xm-xx)/(xmin-xx))*.5d0*xx) |
| 362 | endif |
| 363 | fpartone=fpartone+dpd2+dpd1 |
| 364 | endif |
| 365 | |
| 366 | 999 continue |
| 367 | if(j.lt.0)fpartone=fpartone/naflav/2. |
| 368 | return |
| 369 | end |
| 370 | |
| 371 | c------------------------------------------------------------------------ |
| 372 | function fparton(xx,qq,j) !former pspdf0 (sha) |
| 373 | c----------------------------------------------------------------------- |
| 374 | c |
| 375 | c parton distribution function for proton ( actually x*f(x) !!!!!!! ) |
| 376 | c |
| 377 | c xx = light cone momentum fraction |
| 378 | c qq = virtuality scale |
| 379 | c j = parton type |
| 380 | c -1 ... sea (dsistribution fuction per flavor) |
| 381 | c 0 ... g |
| 382 | c 1 ... u |
| 383 | c 2 ... d |
| 384 | c |
| 385 | c----------------------------------------------------------------------- |
| 386 | c (see pages 105 - 107 of our report) |
| 387 | c |
| 388 | c fparton(xx) = xx * f(xx) !!!!! |
| 389 | c |
| 390 | c f_j(xx,qq) = \sum_k \int(xx<x<1) dx/x f0_k(x) Eqcd_k_j(xx/x,qq) |
| 391 | c |
| 392 | c f0_k = fzeroGlu or fzeroSea |
| 393 | c |
| 394 | c Eqcd=E~qcd+delta*sudakov, E~qcd: at least one emission |
| 395 | c |
| 396 | c----------------------------------------------------------------------- |
| 397 | double precision z,xmin,xm,zx,psuds |
| 398 | common/ar3/ x1(7),a1(7) |
| 399 | include 'epos.inc' |
| 400 | include 'epos.incsem' |
| 401 | |
| 402 | c ...... f_0 * sudakov......... |
| 403 | |
| 404 | if(j.eq.0)then |
| 405 | fparton=fzeroGlu(xx,2,1) |
| 406 | elseif(j.eq.1.or.j.eq.2)then |
| 407 | fparton=psdfh4(xx,q2min,0.,2,j) |
| 408 | else |
| 409 | fparton=fzeroSea(xx,2,1) |
| 410 | endif |
| 411 | fparton=fparton*sngl(psuds(qq,j)/psuds(q2min,j)) |
| 412 | |
| 413 | c......... integral f_0 E_qcd............ |
| 414 | |
| 415 | xmin=xx/(1.d0-dble(q2ini/qq)) |
| 416 | if(xmin.lt.1.d0)then |
| 417 | dpd1=0. |
| 418 | dpd2=0. |
| 419 | xm=max(xmin,.3d0) |
| 420 | |
| 421 | !numerical integration xm -> 1 |
| 422 | |
| 423 | do i=1,7 |
| 424 | do m=1,2 |
| 425 | zx=1.d0-(1.d0-xm)*(.5d0+(dble(m)-1.5d0)*dble(x1(i)))**.25d0 |
| 426 | z=xx/zx |
| 427 | |
| 428 | gl=fzeroGlu(sngl(zx),2,1) |
| 429 | uv=psdfh4(sngl(zx),q2min,0.,2,1) |
| 430 | dv=psdfh4(sngl(zx),q2min,0.,2,2) |
| 431 | sea=fzeroSea(sngl(zx),2,1) |
| 432 | |
| 433 | if(j.eq.0)then |
| 434 | fz=psevi(q2min,qq,z,1,1)*gl |
| 435 | * +(uv+dv+sea)*psevi(q2min,qq,z,2,1) |
| 436 | elseif(j.eq.1)then |
| 437 | fz=psevi(q2min,qq,z,3,2)*uv |
| 438 | elseif(j.eq.2)then |
| 439 | fz=psevi(q2min,qq,z,3,2)*dv |
| 440 | else |
| 441 | akns=psevi(q2min,qq,z,3,2) !nonsinglet contribution |
| 442 | aks=(psevi(q2min,qq,z,2,2)-akns) !singlet contribution |
| 443 | fz=(psevi(q2min,qq,z,1,2)*gl+(uv+dv+sea)*aks+sea*akns) |
| 444 | endif |
| 445 | dpd1=dpd1+a1(i)*fz/sngl(zx)**2/sngl(1.d0-zx)**3 |
| 446 | enddo |
| 447 | enddo |
| 448 | dpd1=dpd1*sngl((1.d0-xm)**4/8.*xx) |
| 449 | |
| 450 | !numerical integration xmin -> xm |
| 451 | |
| 452 | if(xm.gt.xmin)then |
| 453 | do i=1,7 |
| 454 | do m=1,2 |
| 455 | zx=xx+(xm-xx)*((xmin-xx)/(xm-xx)) |
| 456 | * **(.5d0-(dble(m)-1.5)*dble(x1(i))) |
| 457 | z=xx/zx |
| 458 | |
| 459 | gl=fzeroGlu(sngl(zx),2,1) |
| 460 | uv=psdfh4(sngl(zx),q2min,0.,2,1) |
| 461 | dv=psdfh4(sngl(zx),q2min,0.,2,2) |
| 462 | sea=fzeroSea(sngl(zx),2,1) |
| 463 | |
| 464 | if(j.eq.0)then |
| 465 | fz=psevi(q2min,qq,z,1,1)*gl+(uv+dv+sea)* |
| 466 | * psevi(q2min,qq,z,2,1) |
| 467 | elseif(j.eq.1)then |
| 468 | fz=psevi(q2min,qq,z,3,2)*uv |
| 469 | elseif(j.eq.2)then |
| 470 | fz=psevi(q2min,qq,z,3,2)*dv |
| 471 | else |
| 472 | akns=psevi(q2min,qq,z,3,2) !nonsinglet contribution |
| 473 | aks=(psevi(q2min,qq,z,2,2)-akns) !singlet contribution |
| 474 | fz=(psevi(q2min,qq,z,1,2)*gl+(uv+dv+sea)*aks+sea*akns) |
| 475 | endif |
| 476 | dpd2=dpd2+a1(i)*fz*sngl((1.d0-xx/zx)/zx) |
| 477 | enddo |
| 478 | enddo |
| 479 | dpd2=dpd2*sngl(log((xm-xx)/(xmin-xx))*.5d0*xx) |
| 480 | endif |
| 481 | fparton=fparton+dpd2+dpd1 |
| 482 | endif |
| 483 | if(j.lt.0)fparton=fparton/naflav/2. |
| 484 | return |
| 485 | end |
| 486 | |
| 487 | c------------------------------------------------------------------------ |
| 488 | function fzeroGlu(z,k,ipt) |
| 489 | c----------------------------------------------------------------------- |
| 490 | c |
| 491 | c x*f(x) |
| 492 | c |
| 493 | c f = F & EsoftGluon &=convolution |
| 494 | c |
| 495 | c F(x) = alpff(k)*x**betff(ipt)*(1-x)**alplea(k) |
| 496 | c |
| 497 | c EsoftGluon(x) = x**(-1-dels) * EsoftGluonTil(x) |
| 498 | c |
| 499 | c z - light cone x |
| 500 | c k - hadron class |
| 501 | c ipt - 1=proj 2=targ |
| 502 | c----------------------------------------------------------------------- |
| 503 | double precision xpmin,xp |
| 504 | include 'epos.inc' |
| 505 | common /ar3/ x1(7),a1(7) |
| 506 | include 'epos.incsem' |
| 507 | |
| 508 | fzeroGlu=0. |
| 509 | xpmin=z |
| 510 | xpmin=xpmin**(1+betff(ipt)+dels) |
| 511 | do i=1,7 |
| 512 | do m=1,2 |
| 513 | xp=(.5*(1.+xpmin+(2*m-3)*x1(i)*(1.-xpmin)))**(1./ |
| 514 | * (1+betff(ipt)+dels)) |
| 515 | zz=z/xp |
| 516 | fzeroGlu=fzeroGlu+a1(i)*(1.-xp)**alplea(k)*EsoftGluonTil(zz) |
| 517 | enddo |
| 518 | enddo |
| 519 | fzeroGlu=fzeroGlu*.5*(1.-xpmin)/(1+betff(ipt)+dels) |
| 520 | |
| 521 | fzeroGlu=fzeroGlu *alpff(k) *z**(-dels) |
| 522 | |
| 523 | end |
| 524 | |
| 525 | c------------------------------------------------------------------------ |
| 526 | function fzeroSea(z,k,ipt) |
| 527 | c----------------------------------------------------------------------- |
| 528 | c |
| 529 | c x*f(x) |
| 530 | c |
| 531 | c f = F & EsoftQuark &=convolution |
| 532 | c |
| 533 | c F(x) = alpff(k)*x**betff(ipt)*(1-x)**alplea(k) |
| 534 | c |
| 535 | c EsoftQuark(x) = x**(-1-dels) * EsoftQuarkTil(x) |
| 536 | c |
| 537 | c z - light cone x of the quark, |
| 538 | c k - hadron class |
| 539 | c----------------------------------------------------------------------- |
| 540 | double precision xpmin,xp |
| 541 | common /ar3/ x1(7),a1(7) |
| 542 | include 'epos.inc' |
| 543 | include 'epos.incsem' |
| 544 | |
| 545 | fzeroSea=0. |
| 546 | xpmin=z |
| 547 | xpmin=xpmin**(1+betff(ipt)+dels) |
| 548 | do i=1,7 |
| 549 | do m=1,2 |
| 550 | xp=(.5*(1.+xpmin+(2*m-3)*x1(i)*(1.-xpmin)))**(1./ |
| 551 | * (1+betff(ipt)+dels)) |
| 552 | zz=z/xp |
| 553 | fzeroSea=fzeroSea+a1(i)*(1.-xp)**alplea(k)*EsoftQuarkTil(zz) |
| 554 | enddo |
| 555 | enddo |
| 556 | fzeroSea=fzeroSea*.5*(1.-xpmin)/(1+betff(ipt)+dels) |
| 557 | |
| 558 | fzeroSea=fzeroSea *alpff(k) *z**(-dels) |
| 559 | |
| 560 | end |
| 561 | |
| 562 | c------------------------------------------------------------------------ |
| 563 | function EsoftGluonTil(zz) |
| 564 | c----------------------------------------------------------------------- |
| 565 | c EsoftGluon = zz^(-1-dels) * EsoftGluonTil |
| 566 | c----------------------------------------------------------------------- |
| 567 | include 'epos.inc' |
| 568 | include 'epos.incsem' |
| 569 | EsoftGluonTil=gamsoft*(1-glusea)*(1.-zz)**betpom |
| 570 | end |
| 571 | |
| 572 | c------------------------------------------------------------------------ |
| 573 | function EsoftQuarkTil(zz) |
| 574 | c----------------------------------------------------------------------- |
| 575 | c EsoftQuark = zz^(-1-dels) * EsoftQuarkTil |
| 576 | c----------------------------------------------------------------------- |
| 577 | double precision zmin,z |
| 578 | common /ar3/ x1(7),a1(7) |
| 579 | include 'epos.inc' |
| 580 | include 'epos.incsem' |
| 581 | |
| 582 | EsoftQuarkTil=0. |
| 583 | zmin=zz |
| 584 | zmin=zmin**(1.+dels) |
| 585 | do i=1,7 |
| 586 | do m=1,2 |
| 587 | z=(.5d0*(1.+zmin+(2*m-3)*x1(i)*(1.d0-zmin))) |
| 588 | * **(1.d0/(1.d0+dels)) |
| 589 | EsoftQuarkTil=EsoftQuarkTil+a1(i)*max(1.d-5,(1.d0-zz/z))**betpom |
| 590 | * *(z**2+(1.-z)**2) |
| 591 | enddo |
| 592 | enddo |
| 593 | EsoftQuarkTil=EsoftQuarkTil*1.5*(1.d0-zmin)/(1.+dels) |
| 594 | !1.5=naflav/2 at Q0 |
| 595 | EsoftQuarkTil=gamsoft*glusea*EsoftQuarkTil |
| 596 | |
| 597 | end |
| 598 | |
| 599 | c------------------------------------------------------------------------ |
| 600 | function EsoftQZero(zz) ! former psftilf |
| 601 | c----------------------------------------------------------------------- |
| 602 | c |
| 603 | c EsoftQuark = EsoftQZero * wsplit * z^(-1-dels) * gamsoft |
| 604 | c |
| 605 | c zz - ratio of the quark and pomeron light cone x (zz=x_G/x_P) |
| 606 | c integration over quark to gluon light cone momentum ratio (z=x/x_G): |
| 607 | c |
| 608 | c EsoftQZero = int(dz) z^dels * (1-zz/z)^betpom * P_qG(z) |
| 609 | c |
| 610 | c----------------------------------------------------------------------- |
| 611 | double precision zmin,z |
| 612 | common /ar3/ x1(7),a1(7) |
| 613 | include 'epos.incsem' |
| 614 | |
| 615 | EsoftQZero=0. |
| 616 | zmin=zz |
| 617 | zmin=zmin**(1.+dels) |
| 618 | do i=1,7 |
| 619 | do m=1,2 |
| 620 | z=(.5d0*(1.+zmin+(2*m-3)*x1(i)*(1.d0-zmin))) |
| 621 | * **(1.d0/(1.d0+dels)) |
| 622 | EsoftQZero=EsoftQZero+a1(i)*max(1.d-5,(1.d0-zz/z))**betpom |
| 623 | * *(z**2+(1.-z)**2) |
| 624 | enddo |
| 625 | enddo |
| 626 | EsoftQZero=EsoftQZero*1.5*(1.d0-zmin)/(1.+dels) !1.5=naflav/2 at Q0 |
| 627 | return |
| 628 | end |
| 629 | |
| 630 | c------------------------------------------------------------------------ |
| 631 | function ffsigi(qq,y0) !former psjx1 (sto) |
| 632 | c------------------------------------------------------------------------ |
| 633 | c |
| 634 | c dsigma/dpt_jet = \int dy \int dx1 ffsig(x1,x2(x1)) |
| 635 | c |
| 636 | c x1=xplus, x2=xminus |
| 637 | c x2=x2(x1) due to u+t+s=0 |
| 638 | c ( s=x1*x2*spp, t/spp=-x1*xt*exp(-y)/2, u/spp=-x2*xt*exp(y)/2 ) |
| 639 | c |
| 640 | c qq = pt**2, xt=2.*sqrt(qq/s) |
| 641 | c rapidity range: 0 to y0 |
| 642 | c |
| 643 | c ffsig = function ffsig(t,qq,x1,x2) |
| 644 | c |
| 645 | c----------------------------------------------------------------------- |
| 646 | include 'epos.incsem' |
| 647 | include 'epos.inc' |
| 648 | double precision xx1,xx2,xt,ymax,ymin,y,xmin,xmax |
| 649 | ig=3 |
| 650 | ig1=3 |
| 651 | s=engy**2 |
| 652 | ffsigi=0. |
| 653 | if(s.le.4.*qq)return |
| 654 | if(qq.lt.q2min)return |
| 655 | xt=2d0*sqrt(dble(qq)/dble(s)) |
| 656 | ymax=min(dble(y0),log(1d0/xt+sqrt((1d0/xt-1d0)*(1d0/xt+1d0)))) |
| 657 | ymin=-ymax !final result must be divided by 2 |
| 658 | do i=1,ig |
| 659 | do m=1,2 |
| 660 | y=.5d0*(ymax+ymin+(ymin-ymax)*dble((2*m-3)*tgss(ig,i))) |
| 661 | !for xx1-integration, use variable x=xx1-xt*exp(y)/2.,with xmin<x<xmax |
| 662 | xmin=xt**2/2.d0/(2.d0-xt*exp(-y)) !condition x2<1 |
| 663 | xmax=1.d0-xt*exp(y)/2.d0 !condition x1<1 |
| 664 | fx=0. |
| 665 | do i1=1,ig1 |
| 666 | do m1=1,2 |
| 667 | xx1=xt*exp(y)/2.d0+xmin*(xmax/xmin)**dble(.5 |
| 668 | & +tgss(ig1,i1)*(m1-1.5)) |
| 669 | xx2=xt*exp(-y)*xx1/(2.d0*xx1-xt*exp(y)) |
| 670 | z=sngl(xx1*xx2) |
| 671 | sh=z*s |
| 672 | aa=1.-4.*qq/sh |
| 673 | aa=max(1e-10,aa) |
| 674 | t=sh/2.*(1.-sqrt(aa)) !formula in parton-parton cms |
| 675 | ft=ffsig(t,qq,sngl(xx1),sngl(xx2)) |
| 676 | fx=fx+wgss(ig1,i1)*ft/sh**2 |
| 677 | enddo |
| 678 | enddo |
| 679 | fx=fx*0.5*sngl(log(xmax/xmin)) !dx/x=0.5*log(xmax/xmin)dt (gauss) |
| 680 | ffsigi=ffsigi+wgss(ig,i)*fx |
| 681 | enddo |
| 682 | enddo |
| 683 | ffsigi=ffsigi*0.5*sngl(ymax-ymin) !dy=0.5*(ymax-ymin)dt (gauss) |
| 684 | * *2*pi*(2*pi*pssalf(qq/qcdlam))**2 !alpha = 2*pi*pssalf |
| 685 | * *2*sqrt(qq) !d2pt=2*pi*pt*dpt |
| 686 | * /2 ! y interval 2 * Delta_y |
| 687 | * /2 ! condition t < sqrt(s)/2, |
| 688 | ! since t > sqrt(s)/2 is automatically included, |
| 689 | ! see psbori |
| 690 | return |
| 691 | end |
| 692 | |
| 693 | c------------------------------------------------------------------------ |
| 694 | function psbori(s,t,j,l,n) |
| 695 | c----------------------------------------------------------------------- |
| 696 | c contribution to the born cross-section: |
| 697 | c |
| 698 | c dsigmaBorn/d2pt/dy = s/pi * delta(s+t+u) * 2*pi*alpha**2 /s**2 *psbori |
| 699 | c |
| 700 | c s - c.m. energy squared for the born scattering, |
| 701 | c t - invariant variable for the born scattering |(p1-p3)**2|, |
| 702 | c j - parton type at current end of the ladder (0 - g, 1,-1,2,... - q) |
| 703 | c l - parton type at opposite end of the ladder (0 - g, 1,-1,2,... - q) |
| 704 | c n - subprocess number |
| 705 | c----------------------------------------------------------------------- |
| 706 | include 'epos.incsem' |
| 707 | |
| 708 | psbori=0. |
| 709 | u=s-t |
| 710 | if(u.le.0.d0)return |
| 711 | |
| 712 | if(iabs(j).ne.4)then !light quarks and gluons |
| 713 | if(n.eq.1)then |
| 714 | if(j.eq.0.and.l.eq.0)then !gg->gg |
| 715 | psbori=(3.-t*u/s**2+s*u/t**2+s*t/u**2)*4.5 |
| 716 | elseif(j*l.eq.0)then !gq->gq |
| 717 | psbori=(s**2+u**2)/t**2+(s/u+u/s)/2.25 |
| 718 | elseif(j.eq.l)then !qq->qq |
| 719 | psbori=((s**2+u**2)/t**2+(s**2+t**2)/u**2)/2.25 |
| 720 | * -s**2/t/u/3.375 |
| 721 | elseif(j.eq.-l)then !qq~->qq~ |
| 722 | psbori=((s**2+u**2)/t**2+(u**2+t**2)/s**2)/2.25 |
| 723 | * +u**2/t/s/3.375 |
| 724 | else !qq'->qq' |
| 725 | psbori=(s**2+u**2)/t**2/2.25 |
| 726 | endif |
| 727 | elseif(n.eq.2)then |
| 728 | if(j.eq.0.and.l.eq.0)then !gg->qq~ |
| 729 | psbori=.5*(t/u+u/t)-1.125*(t*t+u*u)/s**2 |
| 730 | elseif(j.eq.-l)then !qq~->q'q'~ |
| 731 | psbori=(t*t+u*u)/s**2/1.125 |
| 732 | else |
| 733 | psbori=0. |
| 734 | endif |
| 735 | elseif(n.eq.3)then |
| 736 | if(j.ne.0.and.j.eq.-l)then !qq~->gg |
| 737 | psbori=32./27.*(t/u+u/t)-(t*t+u*u)/s**2/.375 |
| 738 | else |
| 739 | psbori=0. |
| 740 | endif |
| 741 | |
| 742 | c............ n=4 for photon product processes, make e_q**2 =2/9., |
| 743 | c the average value of charge squared for all types of quarks. |
| 744 | elseif(n.eq.4) then |
| 745 | if(j.ne.0.and.j.eq.-l)then !qq~->g+gamma |
| 746 | psbori=16*factgam*(u/t+t/u)/81. |
| 747 | elseif (j*l.eq.0.and.j+l.ne.0) then !q(q~)g->q(q~)+gamma |
| 748 | psbori=2*factgam*(u/s+s/u)/27. |
| 749 | else |
| 750 | psbori=0. |
| 751 | endif |
| 752 | elseif(n.eq.5) then |
| 753 | if(j.ne.0.and.j.eq.-l)then !qq~->gamma+gamma |
| 754 | psbori=4*factgam*(t/u+u/t)/81. |
| 755 | else |
| 756 | psbori=0. |
| 757 | endif |
| 758 | endif |
| 759 | |
| 760 | elseif(n.eq.1)then !c-quark |
| 761 | |
| 762 | if(l.eq.0)then !cg->cg |
| 763 | xm=qcmass**2/s/u |
| 764 | psbori=(s**2+u**2)/t**2+(s/u+u/s)/2.25 |
| 765 | * -4.*qcmass**2/t+xm*(xm*t**2-t)/.5625+4.*qcmass**2*xm |
| 766 | else !cq->cq |
| 767 | psbori=(s**2+u**2)/t**2/2.25-qcmass**2/t/1.125 |
| 768 | endif |
| 769 | |
| 770 | else |
| 771 | |
| 772 | psbori=0. |
| 773 | |
| 774 | endif |
| 775 | return |
| 776 | end |
| 777 | |
| 778 | c----------------------------------------------------------------------- |
| 779 | double precision function om51p(sy,xh,yp,b,iqq) |
| 780 | c----------------------------------------------------------------------- |
| 781 | c om5p - chi~(x,y) |
| 782 | c xh - fraction of the energy squared s for the pomeron; |
| 783 | c yp - rapidity for the pomeron; |
| 784 | c b - impact parameter between the pomeron ends; |
| 785 | c iqq =-1 - 0+1+2+3+4, |
| 786 | c iqq = 0 - soft pomeron, |
| 787 | c iqq = 1 - gg, |
| 788 | c iqq = 2 - qg, |
| 789 | c iqq = 3 - gq, |
| 790 | c iqq = 4 - qq, |
| 791 | c iqq = 5 - soft(int)|b, |
| 792 | c iqq = 6 - gg(int)|b, |
| 793 | c iqq = 7 - soft(proj)|b, |
| 794 | c iqq = 8 - gg(proj)|b, |
| 795 | c iqq = 9 - qg(proj)|b, |
| 796 | c iqq = 10 - total fro-uncut integrated, |
| 797 | c iqq = 11 - total uncut integrated, |
| 798 | c iqq = 12 - soft(int), |
| 799 | c iqq = 13 - gg(int), |
| 800 | c iqq = 14 - <b^2*soft(int)>, |
| 801 | c iqq = 15 - <b^2*gg(int)>, |
| 802 | c iqq = 16 - soft(proj-int), |
| 803 | c iqq = 17 - gg(proj-int), |
| 804 | c iqq = 18 - qg(proj-int), |
| 805 | c iqq = 19 - <b^2*soft(proj)>, |
| 806 | c iqq = 20 - <b^2*gg(proj)>, |
| 807 | c iqq = 21 - <b^2*qg(proj)> |
| 808 | c----------------------------------------------------------------------- |
| 809 | double precision xh,yp!,coefom1,coefom2 |
| 810 | common /psar7/ delx,alam3p,gam3p |
| 811 | common /psar37/ coefom1,coefom2 |
| 812 | include 'epos.inc' |
| 813 | include 'epos.incsem' |
| 814 | |
| 815 | xp=dsqrt(xh)*exp(yp) |
| 816 | if(xh.ne.0.d0)then |
| 817 | xm=xh/xp |
| 818 | else |
| 819 | xm=0. |
| 820 | endif |
| 821 | rp=r2had(iclpro)+r2had(icltar)+slopom*log(max(1.,sy)) |
| 822 | zb=exp(-b**2/(4.*.0389*rp)) |
| 823 | rh=r2had(iclpro)+r2had(icltar) |
| 824 | |
| 825 | if(iqq.eq.0)then !soft |
| 826 | c rp=r2hads(iclpro)+r2hads(icltar)+slopoms*log(max(1.,sy)) |
| 827 | zb=exp(-b**2/(4.*.0389*rp)) |
| 828 | om51p=chad(iclpro)*chad(icltar)*gamhads(iclpro) |
| 829 | * *gamhads(icltar)*sy**dels*(xp*xm)**(-alppar)*zb/rp |
| 830 | elseif(iqq.le.4)then !gg,qg,gq,qq |
| 831 | om51p=psvin(sy,xp,xm,zb,iqq) |
| 832 | elseif(iqq.eq.5)then !soft(int)|b |
| 833 | c rh=alam3p+slopoms*log(max(1.,sy)) |
| 834 | om51p=sy**dels*zb**(rp/rh)/rh |
| 835 | elseif(iqq.eq.6)then !gg(int)|b |
| 836 | om51p=psvin(sy,xp,xm,zb,14) |
| 837 | elseif(iqq.eq.7)then !soft(proj)b |
| 838 | c rh=r2hads(iclpro)+.5*alam3p+slopoms*log(max(1.,sy)) |
| 839 | om51p=chad(iclpro)*gamhads(iclpro)*sy**dels |
| 840 | * *xp**(-alppar)*zb**(rp/rh)/rh |
| 841 | elseif(iqq.eq.8)then !gg(proj)b |
| 842 | om51p=psvin(sy,xp,xm,zb,16) |
| 843 | elseif(iqq.eq.9)then !qg(proj)b |
| 844 | om51p=psvin(sy,xp,xm,zb,18) |
| 845 | elseif(iqq.eq.10)then !total fro-uncut integrated |
| 846 | om51p=0.d0 |
| 847 | return |
| 848 | elseif(iqq.eq.11)then !total uncut integrated |
| 849 | om51p=psvin(sy,xp,xm,zb,9) |
| 850 | c om51p=om51p+dble(coefom1)/2.d0*om51p**2+dble(coefom2)/6.d0*om51p**3 !!!!!!!!!! |
| 851 | c if(om51p.gt.100.d0)om51p=100.d0 |
| 852 | elseif(iqq.eq.12)then !soft(int) |
| 853 | om51p=sy**dels*4.*.0389 |
| 854 | elseif(iqq.eq.13)then !gg(int) |
| 855 | om51p=psvin(sy,xp,xm,zb,5) |
| 856 | elseif(iqq.eq.14)then !<b^2*soft(int)> |
| 857 | c rh=alam3p+slopoms*log(max(1.,sy)) |
| 858 | om51p=sy**dels*rh*(4.*.0389)**2 |
| 859 | elseif(iqq.eq.15)then !<b^2*gg(int)> |
| 860 | om51p=psvin(sy,xp,xm,zb,15) |
| 861 | elseif(iqq.eq.16)then !soft(proj-int) |
| 862 | om51p=chad(iclpro)*gamhads(iclpro)*sy**dels |
| 863 | * *xp**(-alppar)*4.*.0389 |
| 864 | elseif(iqq.eq.17)then !gg(proj-int) |
| 865 | om51p=psvin(sy,xp,xm,zb,6) |
| 866 | elseif(iqq.eq.18)then !qg(proj-int) |
| 867 | om51p=psvin(sy,xp,xm,zb,7) |
| 868 | elseif(iqq.eq.19)then !<b^2*soft(proj)> |
| 869 | c rh=r2hads(iclpro)+.5*alam3p+slopoms*log(max(1.,sy)) |
| 870 | om51p=chad(iclpro)*gamhads(iclpro)*sy**dels |
| 871 | * *xp**(-alppar)*rh*(4.*.0389)**2 |
| 872 | elseif(iqq.eq.20)then !<b^2*gg(proj)> |
| 873 | om51p=psvin(sy,xp,xm,zb,17) |
| 874 | elseif(iqq.eq.21)then !<b^2*qg(proj)> |
| 875 | om51p=psvin(sy,xp,xm,zb,19) |
| 876 | endif |
| 877 | |
| 878 | return |
| 879 | end |
| 880 | |
| 881 | cc----------------------------------------------------------------------- |
| 882 | c double precision function om2p(xh,yp,xprem0,xmrem0,b,iqq) |
| 883 | cc----------------------------------------------------------------------- |
| 884 | cc om2p - chi~(x,y) for cut pomeron |
| 885 | cc xh - fraction of the energy squared s for the pomeron; |
| 886 | cc yp - rapidity for the pomeron; |
| 887 | cc xprem - x+ for the projectile remnant; |
| 888 | cc xmrem - x- for the target remnant; |
| 889 | cc b - impact parameter between the pomeron ends; |
| 890 | cc iqq = 0 - total, |
| 891 | cc iqq = 1 - 1-cut, |
| 892 | cc iqq = 2 - Y+, |
| 893 | cc iqq = -2 - Y-, |
| 894 | cc iqq = 3 - 1-cut(soft), |
| 895 | cc iqq = 4 - 1+(gg), |
| 896 | cc iqq = 5 - 1+(qg), |
| 897 | cc iqq = 6 - 1+(gq), |
| 898 | cc iqq = 7 - 1+(difr) |
| 899 | cc iqq = -7 - 1-(difr) |
| 900 | cc----------------------------------------------------------------------- |
| 901 | c double precision xh,yp,xprem0,xmrem0 |
| 902 | c include 'epos.inc' |
| 903 | c include 'epos.incsem' |
| 904 | c |
| 905 | c om2p=0.d0 |
| 906 | c sy=xh*engy**2 |
| 907 | c xprem=sngl(xprem0) |
| 908 | c xmrem=sngl(xmrem0) |
| 909 | c xp=dsqrt(xh)*dexp(yp) |
| 910 | c if(xh.ne.0.d0)then |
| 911 | c xm=xh/xp |
| 912 | c else |
| 913 | c xm=0. |
| 914 | c endif |
| 915 | c rp=r2had(iclpro)+r2had(icltar)+slopom*log(max(1.,sy)) |
| 916 | c zb=exp(-b**2/(4.*.0389*rp)) |
| 917 | c |
| 918 | c if(iqq.eq.0)then |
| 919 | c om2p=psvy(xp,xprem,xm,xmrem,b,2) |
| 920 | c * +psvy(xp,xprem,xm,xmrem,b,-2) |
| 921 | c * +psvy(xp,xprem,xm,xmrem,b,3) |
| 922 | c * +psvy(xp,xprem,xm,xmrem,b,-3) |
| 923 | c * +psvy(xp,xprem,xm,xmrem,b,9) |
| 924 | c * +psvy(xp,xprem,xm,xmrem,b,-9) |
| 925 | c * +psvx(xp,xprem,xm,xmrem,b,1) |
| 926 | c * +psvx(xp,xprem,xm,xmrem,b,2) |
| 927 | c * +psvx(xp,xprem,xm,xmrem,b,-2) |
| 928 | c * +psvx(xp,xprem,xm,xmrem,b,6) |
| 929 | c * +psvx(xp,xprem,xm,xmrem,b,-6) |
| 930 | c om2p=om2p+(chad(iclpro)*chad(icltar)*gamhad(iclpro) |
| 931 | c * *gamhad(icltar)*sy**dels*(xp*xm)**(-alppar)*zb/rp |
| 932 | c * +psvin(sy,xp,xm,zb,1)+psvin(sy,xp,xm,zb,2) |
| 933 | c * +psvin(sy,xp,xm,zb,3)+psvin(sy,xp,xm,zb,4)) |
| 934 | c elseif(iqq.eq.1)then |
| 935 | c om2p=psvy(xp,xprem,xm,xmrem,b,2)+psvy(xp,xprem,xm,xmrem,b,-2) |
| 936 | c * +psvx(xp,xprem,xm,xmrem,b,1) |
| 937 | c elseif(iqq.eq.2)then |
| 938 | c om2p=psvy(xp,xprem,xm,xmrem,b,3) |
| 939 | c * +psvx(xp,xprem,xm,xmrem,b,2) |
| 940 | c elseif(iqq.eq.-2)then |
| 941 | c om2p=psvy(xp,xprem,xm,xmrem,b,-3) |
| 942 | c * +psvx(xp,xprem,xm,xmrem,b,-2) |
| 943 | c elseif(iqq.eq.3)then |
| 944 | c om2p=psvy(xp,xprem,xm,xmrem,b,4)+psvy(xp,xprem,xm,xmrem,b,-4) |
| 945 | c * +psvx(xp,xprem,xm,xmrem,b,3) |
| 946 | c elseif(iqq.eq.4)then |
| 947 | c om2p=psvy(xp,xprem,xm,xmrem,b,5)+psvy(xp,xprem,xm,xmrem,b,7) |
| 948 | c * +psvy(xp,xprem,xm,xmrem,b,-5)+psvy(xp,xprem,xm,xmrem,b,-7) |
| 949 | c * +psvx(xp,xprem,xm,xmrem,b,4)+psvx(xp,xprem,xm,xmrem,b,-4) |
| 950 | c elseif(iqq.eq.5)then |
| 951 | c om2p=psvy(xp,xprem,xm,xmrem,b,6)+psvy(xp,xprem,xm,xmrem,b,-8) |
| 952 | c * +psvx(xp,xprem,xm,xmrem,b,5) |
| 953 | c elseif(iqq.eq.6)then |
| 954 | c om2p=psvy(xp,xprem,xm,xmrem,b,-6)+psvy(xp,xprem,xm,xmrem,b,8) |
| 955 | c * +psvx(xp,xprem,xm,xmrem,b,-5) |
| 956 | c elseif(iqq.eq.7)then |
| 957 | c om2p=psvy(xp,xprem,xm,xmrem,b,9) |
| 958 | c * +psvx(xp,xprem,xm,xmrem,b,6) |
| 959 | c elseif(iqq.eq.-7)then |
| 960 | c om2p=psvy(xp,xprem,xm,xmrem,b,-9) |
| 961 | c * +psvx(xp,xprem,xm,xmrem,b,-6) |
| 962 | c else |
| 963 | c stop'om2p-wrong iqq!!!' |
| 964 | c endif |
| 965 | c return |
| 966 | c end |
| 967 | c |
| 968 | cc----------------------------------------------------------------------- |
| 969 | c double precision function om3p(xh,yp,xleg,xprem,xmrem,xlrem |
| 970 | c *,b1,b2,b12,iqq) |
| 971 | cc----------------------------------------------------------------------- |
| 972 | cc om3p - chi~(x,y) for cut pomeron (nuclear effects) |
| 973 | cc xh - fraction of the energy squared s for the pomeron; |
| 974 | cc yp - rapidity for the pomeron; |
| 975 | cc xleg - x for the pomeron leg; |
| 976 | cc xprem - x+ for the projectile remnant; |
| 977 | cc xmrem - x- for the target remnant; |
| 978 | cc xlrem - x for the leg remnant; |
| 979 | cc b1 - impact parameter between the pomeron ends; |
| 980 | cc b2 - impact parameter for the second pomeron end; |
| 981 | cc iqq = 1 - uncut+, |
| 982 | cc iqq = 2 - cut+, |
| 983 | cc iqq = 3 - scr+, |
| 984 | cc iqq = 4 - diffr+, |
| 985 | cc iqq = 5 - uncut-, |
| 986 | cc iqq = 6 - cut-, |
| 987 | cc iqq = 7 - scr-, |
| 988 | cc iqq = 8 - diff- |
| 989 | cc iqq = 9 - uncut-h+, |
| 990 | cc iqq = 10 - uncut-h-, |
| 991 | cc iqq = 11 - uncut-YY+, |
| 992 | cc iqq = 12 - uncut-YY-, |
| 993 | cc----------------------------------------------------------------------- |
| 994 | c double precision xh,yp,xleg,xprem,xmrem,xlrem |
| 995 | c |
| 996 | c om3p=0.d0 |
| 997 | c return !!!!!!!!!!!!!!! |
| 998 | cc if(iqq.ne.1.and.iqq.ne.5.and.iqq.ne.9.and.iqq.ne.10 |
| 999 | cc *.and.iqq.ne.11.and.iqq.ne.12)return |
| 1000 | c |
| 1001 | cc$$$ xp=dsqrt(xh)*exp(yp) |
| 1002 | cc$$$ if(xh.ne.0.d0)then |
| 1003 | cc$$$ xm=xh/xp |
| 1004 | cc$$$ else |
| 1005 | cc$$$ xm=0.d0 |
| 1006 | cc$$$ endif |
| 1007 | cc$$$ |
| 1008 | cc$$$ return |
| 1009 | c end |
| 1010 | c |
| 1011 | cc----------------------------------------------------------------------- |
| 1012 | c double precision function om4p(xx1,xx2,xx3,xx4 |
| 1013 | c *,b12,b13,b14,b23,b24,b34,iqq) |
| 1014 | cc----------------------------------------------------------------------- |
| 1015 | cc om4p - chi for 2-leg contributions |
| 1016 | cc xx_i - x+- for pomeron ends; |
| 1017 | cc b_ij - impact parameter diff. between pomeron ends; |
| 1018 | cc iqq = 1 - uncut-H, |
| 1019 | cc iqq = 2 - uncut-YY+, |
| 1020 | cc iqq = 3 - uncut-YY- |
| 1021 | cc----------------------------------------------------------------------- |
| 1022 | c double precision xx1,xx2xx3,xx4 |
| 1023 | c om4p=0.d0 |
| 1024 | c return |
| 1025 | c end |
| 1026 | c |
| 1027 | cc------------------------------------------------------------------------ |
| 1028 | c function omi5pp(sy,xpp,xpm,z,iqq) !former psfsh1 |
| 1029 | cc----------------------------------------------------------------------- |
| 1030 | cc omi5pp - integrated semihard interaction eikonal |
| 1031 | cc sy - energy squared for the hard interaction, |
| 1032 | cc z - impact parameter factor, z=exp(-b**2/rp), |
| 1033 | cc iqq - type of the hard interaction: |
| 1034 | cc 0 - soft, 1 - gg, 2 - qg, 3 - gq |
| 1035 | cc----------------------------------------------------------------------- |
| 1036 | c common /ar3/ x1(7),a1(7) |
| 1037 | c common /ar9/ x9(3),a9(3) |
| 1038 | c include 'epos.inc' |
| 1039 | c include 'epos.incsem' |
| 1040 | c fsy(zsy)=zsy**dels !*(1.-1./zsy)**betpom |
| 1041 | c |
| 1042 | c omi5pp=0. |
| 1043 | c if(iclpro.eq.4.and.iqq.eq.2.or.icltar.eq.4.and.iqq.eq.3)then |
| 1044 | c spmin=4.*q2min+2.*qcmass**2 |
| 1045 | c elseif(iqq.ne.0)then |
| 1046 | c spmin=4.*q2min |
| 1047 | c else |
| 1048 | c spmin=0. |
| 1049 | c endif |
| 1050 | c if(sy.le.spmin)return |
| 1051 | c |
| 1052 | c rp=r2had(iclpro)+r2had(icltar)+slopom*log(max(1.,sy)) |
| 1053 | c alpq=(alppar+1.)/2. |
| 1054 | c if(iqq.eq.3)then |
| 1055 | c iclt=iclpro |
| 1056 | c iclp=icltar |
| 1057 | c else |
| 1058 | c iclp=iclpro |
| 1059 | c iclt=icltar |
| 1060 | c endif |
| 1061 | c |
| 1062 | c if(iqq.eq.0)then |
| 1063 | c xpmax=(1.-spmin/sy)**(1.+alplea(iclp)) |
| 1064 | c do i=1,3 |
| 1065 | c do m=1,2 |
| 1066 | c xp=1.-(xpmax*(.5+x9(i)*(m-1.5)))**(1./(1.+alplea(iclp))) |
| 1067 | c xmmax=(1.-spmin/sy/xp)**(1.+alplea(iclt)) |
| 1068 | c do i1=1,3 |
| 1069 | c do m1=1,2 |
| 1070 | c xm=1.-(xmmax*(.5+x9(i1)*(m1-1.5)))**(1./(1.+alplea(iclt))) |
| 1071 | c |
| 1072 | c sy1=sy*xp*xm |
| 1073 | c rh=r2had(iclpro)+r2had(icltar)+slopom*log(max(1.,sy1)) |
| 1074 | c omi5pp=omi5pp+a9(i)*a9(i1)*fsy(sy1)*xmmax*z**(rp/rh)/rh |
| 1075 | c * *(xp*xm)**(-alppar) |
| 1076 | c enddo |
| 1077 | c enddo |
| 1078 | c enddo |
| 1079 | c enddo |
| 1080 | c omi5pp=omi5pp*xpmax/(1.+alplea(iclp))/(1.+alplea(iclt)) |
| 1081 | c * *chad(iclpro)*chad(icltar)*gamhad(iclpro)*gamhad(icltar) |
| 1082 | c * *(xpp*xpm)**(1.-alppar)/4. |
| 1083 | c return |
| 1084 | c else |
| 1085 | c |
| 1086 | c xmin=(spmin/sy)**(delh-dels) |
| 1087 | c do i=1,3 |
| 1088 | c do m=1,2 |
| 1089 | c zh=(.5*(1.+xmin-(2*m-3)*x9(i)*(1.-xmin)))**(1./(delh-dels)) |
| 1090 | c if(iclpro.eq.4.and.iqq.eq.2.or.icltar.eq.4.and.iqq.eq.3)then |
| 1091 | c call psjti0(zh*sy,sgq,sgqb,4,0) |
| 1092 | c call psjti0(zh*sy,sqq,sqqb,4,1) |
| 1093 | c else |
| 1094 | c call psjti0(zh*sy,sgg,sggb,0,0) |
| 1095 | c call psjti0(zh*sy,sgq,sgqb,0,1) |
| 1096 | c call psjti0(zh*sy,sqq,sqqb,1,1) |
| 1097 | c call psjti0(zh*sy,sqaq,sqaqb,-1,1) |
| 1098 | c call psjti0(zh*sy,sqqp,sqqpb,1,2) |
| 1099 | c sqq=(sqq+sqaq+2.*(naflav-1)*sqqp)/naflav/2. |
| 1100 | c endif |
| 1101 | c |
| 1102 | c if(iqq.eq.1)then |
| 1103 | c stg=0. |
| 1104 | c do i1=1,3 |
| 1105 | c do m1=1,2 |
| 1106 | c xx=.5+x9(i1)*(m1-1.5) |
| 1107 | c xp=zh**xx |
| 1108 | c xm=zh/xp |
| 1109 | c |
| 1110 | c xp1max=(1.-xp)**(1.+alplea(iclp)) |
| 1111 | c xm1max=(1.-xm)**(1.+alplea(iclt)) |
| 1112 | c do i2=1,3 |
| 1113 | c do m2=1,2 |
| 1114 | c xp1=1.-(xp1max*(.5+x9(i2)*(m2-1.5))) |
| 1115 | c * **(1./(1.+alplea(iclp))) |
| 1116 | c do i3=1,3 |
| 1117 | c do m3=1,2 |
| 1118 | c xm1=1.-(xm1max*(.5+x9(i3)*(m3-1.5))) |
| 1119 | c * **(1./(1.+alplea(iclt))) |
| 1120 | c if(xp1.lt.xp.or.xm1.lt.xm)write (*,*)'xp1,xm1,xp,xm' |
| 1121 | c * ,xp1,xm1,xp,xm |
| 1122 | c |
| 1123 | c rh=r2had(iclpro)+r2had(icltar)+slopom |
| 1124 | c * *log(xp1*xm1/xp/xm) |
| 1125 | c glu1=(1.-xp/xp1)**betpom*(1.-glusea) |
| 1126 | c sea1=EsoftQZero(xp/xp1)*glusea |
| 1127 | c glu2=(1.-xm/xm1)**betpom*(1.-glusea) |
| 1128 | c sea2=EsoftQZero(xm/xm1)*glusea |
| 1129 | c stg=stg+a9(i1)*a9(i2)*a9(i3)*(glu1*glu2*sgg |
| 1130 | c * +(glu1*sea2+sea1*glu2)*sgq+sea1*sea2*sqq) |
| 1131 | c * *xp1max*xm1max*(xp1*xm1)**(dels-alppar) |
| 1132 | c * *z**(rp/rh)/rh |
| 1133 | c enddo |
| 1134 | c enddo |
| 1135 | c enddo |
| 1136 | c enddo |
| 1137 | c enddo |
| 1138 | c enddo |
| 1139 | c omi5pp=omi5pp-a9(i)*log(zh)*stg/zh**delh |
| 1140 | c |
| 1141 | c else |
| 1142 | c stq=0. |
| 1143 | c xpmin=zh**(dels+.5) |
| 1144 | c do i1=1,3 |
| 1145 | c do m1=1,2 |
| 1146 | c xp=(.5*(1.+xpmin-(2*m1-3)*x9(i1)*(1.-xpmin))) |
| 1147 | c * **(1./(dels+.5)) |
| 1148 | c xm=zh/xp |
| 1149 | c if(xp*xpp.lt..99999)then |
| 1150 | c uv1=psdfh4(xp*xpp,q2min,0.,iclp,1) |
| 1151 | c dv1=psdfh4(xp*xpp,q2min,0.,iclp,2) |
| 1152 | c xm1max=(1.-xm)**(1.+alplea(iclt)) |
| 1153 | c do i2=1,3 |
| 1154 | c do m2=1,2 |
| 1155 | c xm1=1.-(xm1max*(.5+x9(i2)*(m2-1.5))) |
| 1156 | c * **(1./(1.+alplea(iclt))) |
| 1157 | c |
| 1158 | c rh=r2had(iclpro)+r2had(icltar)+slopom*log(xm1/xm) |
| 1159 | c glu2=(1.-xm/xm1)**betpom*(1.-glusea) |
| 1160 | c sea2=EsoftQZero(xm/xm1)*glusea |
| 1161 | c stq=stq+a9(i1)*a9(i2)*(glu2*sgq+sea2*sqq)*(uv1+dv1) |
| 1162 | c * *z**(rp/rh)/rh*xm1max*xm1**(dels-alppar)/sqrt(xp) |
| 1163 | c * *((1.-xp)/(1.-xp*xpp))**(1.-alpq+alplea(iclp)) |
| 1164 | c enddo |
| 1165 | c enddo |
| 1166 | c endif |
| 1167 | c enddo |
| 1168 | c enddo |
| 1169 | c stq=stq*(1.-xpmin) |
| 1170 | c omi5pp=omi5pp+a9(i)*stq/zh**delh |
| 1171 | c endif |
| 1172 | c enddo |
| 1173 | c enddo |
| 1174 | c endif |
| 1175 | c |
| 1176 | c omi5pp=omi5pp*(1.-xmin)/(delh-dels) |
| 1177 | c if(iqq.eq.1)then |
| 1178 | c omi5pp=omi5pp*chad(iclp)*chad(iclt)*gamhad(iclp) |
| 1179 | c * *gamhad(iclt)*rr**2*(xpp*xpm)**(1.-alppar) |
| 1180 | c * /(1.+alplea(iclp))/(1.+alplea(iclt))*pi/8.*factk |
| 1181 | c else |
| 1182 | c omi5pp=omi5pp*chad(iclp)*chad(iclt)*rr*gamhad(iclt) |
| 1183 | c * *xpp**(1.-alpq)*xpm**(1.-alppar)/(.5+dels) |
| 1184 | c * /(1.+alplea(iclt))/16.*factk |
| 1185 | c endif |
| 1186 | c return |
| 1187 | c end |
| 1188 | c |
| 1189 | c------------------------------------------------------------------------ |
| 1190 | function om52pi(sy,xpp,xpm,iqq,je1,je2) !modified om51pp |
| 1191 | c----------------------------------------------------------------------- |
| 1192 | c sy - energy squared for the hard interaction |
| 1193 | c |
| 1194 | c iqq = 0 - sea-sea, |
| 1195 | c iqq = 1 - val-sea, |
| 1196 | c iqq = 2 - sea-val, |
| 1197 | c iqq = 3 - val-val, |
| 1198 | c |
| 1199 | c je = emission type |
| 1200 | c 0 ... no emissions |
| 1201 | c 1 ... emissions |
| 1202 | c else ... all |
| 1203 | c |
| 1204 | c already b-averaged (\int d2b /sigine*10) |
| 1205 | c----------------------------------------------------------------------- |
| 1206 | common /ar3/ x1(7),a1(7) |
| 1207 | common /psar7/ delx,alam3p,gam3p |
| 1208 | include 'epos.inc' |
| 1209 | include 'epos.incsem' |
| 1210 | if(iqq.lt.0.or.iqq.gt.3)stop'om52pi: unvalid iqq' |
| 1211 | |
| 1212 | om52pi=0. |
| 1213 | |
| 1214 | ef1=0 |
| 1215 | ef2=0 |
| 1216 | ef3=0 |
| 1217 | ef4=0 |
| 1218 | if( je1.ge.1 .and. je2.ge.1) ef1=1 |
| 1219 | if( je1.ge.1 .and.(je2.eq.0.or.je2.eq.2))ef2=1 |
| 1220 | if((je1.eq.0.or.je1.eq.2).and. je2.ge.1) ef3=1 |
| 1221 | if((je1.eq.0.or.je1.eq.2).and.(je2.eq.0.or.je2.eq.2))ef4=1 |
| 1222 | |
| 1223 | spmin=4.*q2min |
| 1224 | if(sy.le.spmin)goto999 |
| 1225 | |
| 1226 | if(iqq.eq.1)then |
| 1227 | iclv=iclpro |
| 1228 | ctp060829 icls=icltar |
| 1229 | elseif(iqq.eq.2)then |
| 1230 | ctp060829 icls=iclpro |
| 1231 | iclv=icltar |
| 1232 | endif |
| 1233 | |
| 1234 | delss=dels |
| 1235 | if(iqq.eq.3)delss=-0.5 |
| 1236 | xmin=spmin/sy |
| 1237 | xmin=xmin**(delh-delss) |
| 1238 | alpq=(alppar+1.)/2. |
| 1239 | |
| 1240 | c numerical integration over zh |
| 1241 | do i=1,7 |
| 1242 | do m=1,2 |
| 1243 | zh=(.5*(1.+xmin-(2*m-3)*x1(i)*(1.-xmin)))**(1./(delh-delss)) |
| 1244 | sgg= ef1 *pijet(2,q2min,q2min,zh*sy,0,0) |
| 1245 | * + (ef2+ef3)*pijet(1,q2min,q2min,zh*sy,0,0) |
| 1246 | * + ef4 *pijet(0,q2min,q2min,zh*sy,0,0) |
| 1247 | sgq= ef1 *pijet(2,q2min,q2min,zh*sy,0,1) |
| 1248 | * + (ef2+ef3)*pijet(1,q2min,q2min,zh*sy,0,1) |
| 1249 | * + ef4 *pijet(0,q2min,q2min,zh*sy,0,1) |
| 1250 | sqq= ef1 *pijet(2,q2min,q2min,zh*sy,1,1) |
| 1251 | * + (ef2+ef3)*pijet(1,q2min,q2min,zh*sy,1,1) |
| 1252 | * + ef4 *pijet(0,q2min,q2min,zh*sy,1,1) |
| 1253 | sqaq= ef1 *pijet(2,q2min,q2min,zh*sy,-1,1) |
| 1254 | * + (ef2+ef3)*pijet(1,q2min,q2min,zh*sy,-1,1) |
| 1255 | * + ef4 *pijet(0,q2min,q2min,zh*sy,-1,1) |
| 1256 | sqqp= ef1 *pijet(2,q2min,q2min,zh*sy,1,2) |
| 1257 | * + (ef2+ef3)*pijet(1,q2min,q2min,zh*sy,1,2) |
| 1258 | * + ef4 *pijet(0,q2min,q2min,zh*sy,1,2) |
| 1259 | sqqi=sqq |
| 1260 | sqq=(sqq+sqaq+2.*(naflav-1)*sqqp)/naflav/2. |
| 1261 | if(iqq.eq.0)then |
| 1262 | stg=0. |
| 1263 | do i1=1,7 |
| 1264 | do m1=1,2 |
| 1265 | xx=.5+x1(i1)*(m1-1.5) |
| 1266 | xp=zh**xx |
| 1267 | xm=zh/xp |
| 1268 | glu1=EsoftGluonTil(xp) |
| 1269 | sea1=EsoftQuarkTil(xp) |
| 1270 | glu2=EsoftGluonTil(xm) |
| 1271 | sea2=EsoftQuarkTil(xm) |
| 1272 | dstg= glu1*glu2*sgg |
| 1273 | * +(glu1*sea2+sea1*glu2)*sgq !ccccc |
| 1274 | * +sea1*sea2*sqq !ccccc |
| 1275 | stg=stg+a1(i1)*dstg |
| 1276 | enddo |
| 1277 | enddo |
| 1278 | om52pi=om52pi-a1(i)*log(zh)*stg/zh**delh |
| 1279 | elseif(iqq.eq.3)then |
| 1280 | stq=0. !int^1_(sqrt(z)) dx_p / x_p / sqrt(1-x_p) =int^(tmax)_(0) dt |
| 1281 | tmax=sqrt(1.-sqrt(zh)) !t=ln((1+sqrt(1-x_p))/(1-sqrt(1-x_p))) |
| 1282 | tmax=log((1.+tmax)/(1.-tmax)) |
| 1283 | if(tmax.gt.1.e-20)then |
| 1284 | do i1=1,7 |
| 1285 | do m1=1,2 |
| 1286 | t=tmax*(.5+x1(i1)*(m1-1.5)) |
| 1287 | z01=((1.d0-exp(-1.d0*t))/(1.d0+exp(-1.d0*t)))**2 |
| 1288 | xp=1.-z01 |
| 1289 | xm=zh/xp |
| 1290 | if(xp*xpp.le..9999.and.xm*xpm.le..9999 |
| 1291 | * .or.xm*xpp.le..9999.and.xp*xpm.le..9999)then |
| 1292 | stq=stq+a1(i1) |
| 1293 | * *(psharg(xp*xpp,xm*xpm,sqqi,sqqp,sqaq) |
| 1294 | * +psharg(xm*xpp,xp*xpm,sqqi,sqqp,sqaq)) |
| 1295 | * *max(1e-20,1.-xp)**(.5-alpq) |
| 1296 | * *max(1e-20,1.-xm)**(-alpq) |
| 1297 | * *xp**delss*xm**delss |
| 1298 | * *xpp**alppar/gamhad(iclpro) ! Eval |
| 1299 | * *xpm**alppar/gamhad(icltar) ! Eval |
| 1300 | endif |
| 1301 | enddo |
| 1302 | enddo |
| 1303 | stq=stq*tmax |
| 1304 | endif |
| 1305 | om52pi=om52pi+a1(i)*stq/zh**delh |
| 1306 | elseif(iqq.eq.1.or.iqq.eq.2)then |
| 1307 | stq=0. |
| 1308 | tmax=acos(sqrt(zh)) |
| 1309 | do i1=1,7 |
| 1310 | do m1=1,2 |
| 1311 | t=tmax*(.5+x1(i1)*(m1-1.5)) |
| 1312 | xp=cos(t)**2 |
| 1313 | xm=zh/xp |
| 1314 | if(xp*xpp.lt..99999)then |
| 1315 | uv1=psdfh4(xp*xpp,q2min,0.,iclv,1) ! Eval |
| 1316 | dv1=psdfh4(xp*xpp,q2min,0.,iclv,2) ! Eval |
| 1317 | glu2=EsoftGluonTil(xm) |
| 1318 | sea2=EsoftQuarkTil(xm) |
| 1319 | dstq=0 |
| 1320 | if(xp.ne.1.) |
| 1321 | * dstq=(glu2*sgq+sea2*sqq)*(uv1+dv1) |
| 1322 | * *(1.-xp*xpp)**(-1.+alpq-alplea(iclv)) ! Eval |
| 1323 | * *xp**(delss-.5)*(1.-xp)**(-alpq+.5) ! Eval *sqrt(1-x)/sqrt(x) |
| 1324 | * *xpp**alppar/gamhad(iclv) ! Eval |
| 1325 | stq=stq+a1(i1)*dstq |
| 1326 | endif |
| 1327 | enddo |
| 1328 | enddo |
| 1329 | stq=stq*tmax |
| 1330 | om52pi=om52pi+a1(i)*stq/zh**delh |
| 1331 | else |
| 1332 | stop'om52pi: unvalid iqq (2). ' |
| 1333 | endif |
| 1334 | enddo |
| 1335 | enddo |
| 1336 | |
| 1337 | om52pi=om52pi*(1.-xmin)/(delh-delss) |
| 1338 | |
| 1339 | if(iqq.eq.0)then |
| 1340 | om52pi=om52pi/4 |
| 1341 | elseif(iqq.eq.3)then |
| 1342 | om52pi=om52pi/4 |
| 1343 | * * utgam1(2.+alplea(iclpro)-alpq) ! Eval |
| 1344 | * /utgam1(1.+alplea(iclpro))/utgam1(1.-alpq) ! Eval |
| 1345 | * * utgam1(2.+alplea(icltar)-alpq) ! Eval |
| 1346 | * /utgam1(1.+alplea(icltar))/utgam1(1.-alpq) ! Eval |
| 1347 | * /xpp**alpq/xpm**alpq ! Eval |
| 1348 | elseif(iqq.le.2)then |
| 1349 | om52pi=om52pi/2 |
| 1350 | * *utgam1(2.+alplea(iclv)-alpq)/utgam1(1.+alplea(iclv)) ! Eval |
| 1351 | * /utgam1(1.-alpq) ! Eval |
| 1352 | * /xpp**alpq ! Eval |
| 1353 | endif |
| 1354 | |
| 1355 | 999 continue |
| 1356 | om52pi=om52pi*factk * .0390 /sigine*10 /2. |
| 1357 | end |
| 1358 | |
| 1359 | c------------------------------------------------------------------------ |
| 1360 | function psharg(zh1,zh2,sqq,sqqp,sqaq) |
| 1361 | c----------------------------------------------------------------------- |
| 1362 | include 'epos.incsem' |
| 1363 | include 'epos.inc' |
| 1364 | |
| 1365 | alpq=(alppar+1.)/2. |
| 1366 | if(zh1.le..9999.and.zh2.le..9999)then |
| 1367 | uv1=psdfh4(zh1,q2min,0.,iclpro,1) |
| 1368 | dv1=psdfh4(zh1,q2min,0.,iclpro,2) |
| 1369 | uv2=psdfh4(zh2,q2min,0.,icltar,1) |
| 1370 | dv2=psdfh4(zh2,q2min,0.,icltar,2) |
| 1371 | if(iclpro.eq.2.and.icltar.eq.2)then !proton |
| 1372 | fff=sqq*(uv1*uv2+dv1*dv2)+sqqp*(uv1*dv2+dv1*uv2) |
| 1373 | elseif(iclpro.eq.1.or.icltar.eq.1)then !pion |
| 1374 | fff=sqq*uv1*uv2+sqaq*dv1*dv2+sqqp*(uv1*dv2+dv1*uv2) |
| 1375 | elseif(iclpro.eq.3.or.icltar.eq.3)then !kaon |
| 1376 | fff=sqq*uv1*uv2+sqqp*(uv1*dv2+dv1*uv2+dv1*dv2) |
| 1377 | elseif(iclpro.eq.4.or.icltar.eq.4)then !J/psi |
| 1378 | fff=sqq*uv1*(uv2+dv2) |
| 1379 | endif |
| 1380 | psharg=fff |
| 1381 | * *(1.-zh1)**(-1.+alpq-alplea(iclpro)) |
| 1382 | * *(1.-zh2)**(-1.+alpq-alplea(icltar)) |
| 1383 | else |
| 1384 | psharg=0. |
| 1385 | endif |
| 1386 | return |
| 1387 | end |
| 1388 | |
| 1389 | c------------------------------------------------------------------------ |
| 1390 | function om51pp(sy,xpp,z,iqq) !former psfsh |
| 1391 | c----------------------------------------------------------------------- |
| 1392 | c om51pp - semihard interaction eikonal |
| 1393 | c sy - energy squared for the hard interaction, |
| 1394 | c z - impact parameter factor, z=exp(-b**2/rp), |
| 1395 | c iqq - type of the hard interaction: |
| 1396 | c 0 - gg, 1 - qg, 2 - gq, 3 - gg(int), 4 - gg(proj), 5 - qg(proj), |
| 1397 | c 6 - gg(int)|b=0, 7 - <b^2*gg(int)>, 8 - gg(proj)|b=0, |
| 1398 | c 9 - <b^2*gg(proj)>, 10 - qg(proj)|b=0, 11 - <b^2*qg(proj)> |
| 1399 | c----------------------------------------------------------------------- |
| 1400 | common /ar3/ x1(7),a1(7) |
| 1401 | common /psar7/ delx,alam3p,gam3p |
| 1402 | include 'epos.inc' |
| 1403 | include 'epos.incsem' |
| 1404 | |
| 1405 | om51pp=0. |
| 1406 | if(iqq.eq.0.or.iqq.eq.3.or.iqq.eq.4 |
| 1407 | *.or.iqq.eq.6.or.iqq.eq.7.or.iqq.eq.8.or.iqq.eq.9 |
| 1408 | *.or.iclpro.ne.4.and.(iqq.eq.1.or.iqq.eq.5 |
| 1409 | *.or.iqq.eq.10.or.iqq.eq.11) |
| 1410 | *.or.icltar.ne.4.and.iqq.eq.2)then |
| 1411 | spmin=4.*q2min |
| 1412 | else |
| 1413 | spmin=4.*q2min+2.*qcmass**2 |
| 1414 | endif |
| 1415 | if(sy.le.spmin)goto999 |
| 1416 | |
| 1417 | if(iqq.eq.1.or.iqq.eq.5.or.iqq.eq.10.or.iqq.eq.11)then |
| 1418 | iclv=iclpro |
| 1419 | icls=icltar |
| 1420 | elseif(iqq.eq.2)then |
| 1421 | icls=iclpro |
| 1422 | iclv=icltar |
| 1423 | endif |
| 1424 | |
| 1425 | xmin=spmin/sy |
| 1426 | xmin=xmin**(delh-dels) |
| 1427 | rp=r2had(iclpro)+r2had(icltar)+slopom*log(max(1.,sy)) |
| 1428 | alpq=(alppar+1.)/2. |
| 1429 | |
| 1430 | c numerical integration over zh |
| 1431 | do i=1,7 |
| 1432 | do m=1,2 |
| 1433 | zh=(.5*(1.+xmin-(2*m-3)*x1(i)*(1.-xmin)))**(1./ |
| 1434 | * (delh-dels)) |
| 1435 | if(iqq.eq.0.or.iqq.eq.3.or.iqq.eq.4 |
| 1436 | * .or.iqq.eq.6.or.iqq.eq.7.or.iqq.eq.8.or.iqq.eq.9 |
| 1437 | * .or.iclpro.ne.4.and.(iqq.eq.1.or.iqq.eq.5 |
| 1438 | * .or.iqq.eq.10.or.iqq.eq.11) |
| 1439 | * .or.icltar.ne.4.and.iqq.eq.2)then |
| 1440 | call psjti0(zh*sy,sgg,sggb,0,0) !inclusive (sj) and born (sjb) |
| 1441 | call psjti0(zh*sy,sgq,sgqb,0,1) |
| 1442 | call psjti0(zh*sy,sqq,sqqb,1,1) |
| 1443 | call psjti0(zh*sy,sqaq,sqaqb,-1,1) |
| 1444 | call psjti0(zh*sy,sqqp,sqqpb,1,2) |
| 1445 | sqq=(sqq+sqaq+2.*(naflav-1)*sqqp)/naflav/2. |
| 1446 | c...........test....... |
| 1447 | c tgg= psjet(q2min,q2min,q2min,zh*sy,0,0,0) |
| 1448 | c * +2*psjet1(q2min,q2min,q2min,zh*sy,0,0,0) |
| 1449 | c * + psborn(q2min,q2min,q2min,zh*sy,0,0,0,1) |
| 1450 | c tgq= psjet(q2min,q2min,q2min,zh*sy,0,1,0) |
| 1451 | c * +2*psjet1(q2min,q2min,q2min,zh*sy,0,1,0) |
| 1452 | c * + psborn(q2min,q2min,q2min,zh*sy,0,1,0,1) |
| 1453 | c tqq= psjet(q2min,q2min,q2min,zh*sy,1,1,0) |
| 1454 | c * +2*psjet1(q2min,q2min,q2min,zh*sy,1,1,0) |
| 1455 | c * + psborn(q2min,q2min,q2min,zh*sy,1,1,0,1) |
| 1456 | c tqa= psjet(q2min,q2min,q2min,zh*sy,-1,1,0) |
| 1457 | c * +2*psjet1(q2min,q2min,q2min,zh*sy,-1,1,0) |
| 1458 | c * + psborn(q2min,q2min,q2min,zh*sy,-1,1,0,1) |
| 1459 | c tqqp= psjet(q2min,q2min,q2min,zh*sy,1,2,0) |
| 1460 | c * +2*psjet1(q2min,q2min,q2min,zh*sy,1,2,0) |
| 1461 | c * + psborn(q2min,q2min,q2min,zh*sy,1,2,0,1) |
| 1462 | c write(6,'(f12.2,3x,2f7.3,2(3x,2f7.3))') |
| 1463 | c * zh*sy,tgg,sgg, tgq,sgq, tqqp,sqqp |
| 1464 | c....................... |
| 1465 | else |
| 1466 | call psjti0(zh*sy,sgq,sgqb,4,0) |
| 1467 | call psjti0(zh*sy,sqq,sqqb,4,1) |
| 1468 | endif |
| 1469 | |
| 1470 | if(iqq.eq.0.or.iqq.eq.3.or.iqq.eq.4 |
| 1471 | * .or.iqq.eq.6.or.iqq.eq.7.or.iqq.eq.8.or.iqq.eq.9)then |
| 1472 | stg=0. |
| 1473 | do i1=1,7 |
| 1474 | do m1=1,2 |
| 1475 | xx=.5+x1(i1)*(m1-1.5) |
| 1476 | xp=zh**xx |
| 1477 | xm=zh/xp |
| 1478 | glu1=(1.-xp)**betpom*(1.-glusea) |
| 1479 | sea1=EsoftQZero(xp)*glusea |
| 1480 | glu2=(1.-xm)**betpom*(1.-glusea) |
| 1481 | sea2=EsoftQZero(xm)*glusea |
| 1482 | if(iqq.eq.0)then |
| 1483 | rh=r2had(iclpro)+r2had(icltar)-slopom*log(zh) |
| 1484 | elseif(iqq.eq.3.or.iqq.eq.4)then |
| 1485 | rh=1. |
| 1486 | elseif(iqq.eq.6.or.iqq.eq.7)then |
| 1487 | rh=alam3p-slopom*log(zh) |
| 1488 | elseif(iqq.eq.8.or.iqq.eq.9)then |
| 1489 | rh=r2had(iclpro)+.5*alam3p-slopom*log(zh) |
| 1490 | endif |
| 1491 | dstg=(glu1*glu2*sgg+ |
| 1492 | * (glu1*sea2+sea1*glu2)*sgq+sea1*sea2*sqq) |
| 1493 | * *z**(rp/rh)/rh |
| 1494 | if(iqq.eq.7.or.iqq.eq.9)dstg=dstg*rh**2 |
| 1495 | stg=stg+a1(i1)*dstg |
| 1496 | enddo |
| 1497 | enddo |
| 1498 | om51pp=om51pp-a1(i)*log(zh)*stg/zh**delh |
| 1499 | else |
| 1500 | stq=0. |
| 1501 | tmax=acos(sqrt(zh)) |
| 1502 | do i1=1,7 |
| 1503 | do m1=1,2 |
| 1504 | t=tmax*(.5+x1(i1)*(m1-1.5)) |
| 1505 | xp=cos(t)**2 |
| 1506 | xm=zh/xp |
| 1507 | if(xp*xpp.lt..99999)then |
| 1508 | uv1=psdfh4(xp*xpp,q2min,0.,iclv,1) |
| 1509 | dv1=psdfh4(xp*xpp,q2min,0.,iclv,2) |
| 1510 | glu2=(1.-xm)**betpom*(1.-glusea) |
| 1511 | sea2=EsoftQZero(xm)*glusea |
| 1512 | if(iqq.le.2)then |
| 1513 | rh=r2had(iclpro)+r2had(icltar)-slopom*log(xm) |
| 1514 | elseif(iqq.eq.5)then |
| 1515 | rh=1. |
| 1516 | elseif(iqq.le.10.or.iqq.le.11)then |
| 1517 | rh=r2had(iclpro)+.5*alam3p-slopom*log(xm) |
| 1518 | endif |
| 1519 | dstq=0 |
| 1520 | if(xp.ne.1.) |
| 1521 | * dstq=(glu2*sgq+sea2*sqq)*(uv1+dv1) |
| 1522 | * *z**(rp/rh)/rh |
| 1523 | * *(1.-xp*xpp)**(-1.+alpq-alplea(iclv)) |
| 1524 | * *xp**(dels-.5)*(1.-xp)**(-alpq+.5) |
| 1525 | if(iqq.eq.11)dstq=dstq*rh**2 |
| 1526 | stq=stq+a1(i1)*dstq |
| 1527 | endif |
| 1528 | enddo |
| 1529 | enddo |
| 1530 | stq=stq*tmax |
| 1531 | om51pp=om51pp+a1(i)*stq/zh**delh |
| 1532 | endif |
| 1533 | enddo |
| 1534 | enddo |
| 1535 | |
| 1536 | om51pp=om51pp*(1.-xmin)/(delh-dels)/sy**delh/2. |
| 1537 | if(iqq.eq.0)then |
| 1538 | om51pp=om51pp*chad(iclpro)*chad(icltar)*gamhad(iclpro) |
| 1539 | * *gamhad(icltar)*rr**2*pi |
| 1540 | elseif(iqq.eq.3)then |
| 1541 | om51pp=om51pp*rr**2*pi*4.*.0389 |
| 1542 | elseif(iqq.eq.6)then |
| 1543 | om51pp=om51pp*rr**2*pi |
| 1544 | elseif(iqq.eq.7)then |
| 1545 | om51pp=om51pp*rr**2*pi*(4.*.0389)**2 |
| 1546 | elseif(iqq.eq.4.or.iqq.eq.8.or.iqq.eq.9)then |
| 1547 | om51pp=om51pp*rr**2*pi*chad(iclpro)*gamhad(iclpro) |
| 1548 | if(iqq.eq.4)om51pp=om51pp*4.*.0389 |
| 1549 | if(iqq.eq.9)om51pp=om51pp*(4.*.0389)**2 |
| 1550 | elseif(iqq.le.2)then |
| 1551 | om51pp=om51pp*chad(iclpro)*chad(icltar)*rr*gamhad(icls) |
| 1552 | * *utgam1(2.+alplea(iclv)-alpq)/utgam1(1.+alplea(iclv)) |
| 1553 | * /utgam1(1.-alpq)/2./xpp**alpq |
| 1554 | elseif(iqq.eq.5.or.iqq.eq.10.or.iqq.eq.11)then |
| 1555 | om51pp=om51pp*chad(iclv)*rr |
| 1556 | * *utgam1(2.+alplea(iclv)-alpq)/utgam1(1.+alplea(iclv)) |
| 1557 | * /utgam1(1.-alpq)/2./xpp**alpq |
| 1558 | if(iqq.eq.5)om51pp=om51pp*4.*.0389 |
| 1559 | if(iqq.eq.11)om51pp=om51pp*(4.*.0389)**2 |
| 1560 | endif |
| 1561 | 999 continue |
| 1562 | end |
| 1563 | |
| 1564 | c------------------------------------------------------------------------ |
| 1565 | subroutine psfz(gz2,b) |
| 1566 | c----------------------------------------------------------------------- |
| 1567 | c hadron-nucleus cross sections calculation |
| 1568 | c b - impact parameter squared |
| 1569 | c----------------------------------------------------------------------- |
| 1570 | double precision PhiExpo |
| 1571 | include 'epos.inc' |
| 1572 | common /ar3/ x1(7),a1(7) |
| 1573 | external pttcs,pprcs |
| 1574 | |
| 1575 | gz2=0. |
| 1576 | e1=exp(-1.) |
| 1577 | rs=r2had(iclpro)+r2had(icltar)+max(slopom,slopoms)*log(engy**2) |
| 1578 | & +gwidth*(r2had(iclpro)+r2had(icltar)) |
| 1579 | & +bmxdif(iclpro,icltar)/4./0.0389 |
| 1580 | rpom=4.*.0389*rs |
| 1581 | |
| 1582 | |
| 1583 | do i1=1,7 |
| 1584 | do m=1,2 |
| 1585 | z=.5+x1(i1)*(m-1.5) |
| 1586 | zv1=exp(-z) |
| 1587 | zv2=(e1*z) |
| 1588 | b1=sqrt(-rpom*log(zv1)) |
| 1589 | b2=sqrt(-rpom*log(zv2)) |
| 1590 | |
| 1591 | vv21=sngl(PhiExpo(1.,1.d0,1.d0,engy**2,b1)) |
| 1592 | vv22=sngl(PhiExpo(1.,1.d0,1.d0,engy**2,b2)) |
| 1593 | |
| 1594 | if(maproj.eq.1.and.matarg.eq.1)then |
| 1595 | cg1=1. |
| 1596 | cg2=1. |
| 1597 | elseif(matarg.eq.1)then |
| 1598 | cg1=ptrot(pprcs,b,b1) |
| 1599 | cg2=ptrot(pprcs,b,b2) |
| 1600 | else |
| 1601 | cg1=ptrot(pttcs,b,b1) |
| 1602 | cg2=ptrot(pttcs,b,b2) |
| 1603 | endif |
| 1604 | |
| 1605 | gz2=gz2+a1(i1)*(cg1*(1.-vv21)+cg2*(1.-vv22)/z) |
| 1606 | enddo |
| 1607 | enddo |
| 1608 | gz2=gz2*rpom/2. |
| 1609 | |
| 1610 | return |
| 1611 | end |
| 1612 | |
| 1613 | |
| 1614 | c------------------------------------------------------------------------ |
| 1615 | function ptgau(func,bm,iqq) |
| 1616 | c----------------------------------------------------------------------- |
| 1617 | c impact parameter integration for impact parameters <bm - |
| 1618 | c for nucleus-nucleus and hadron-nucleus cross-sections calculation |
| 1619 | c iqq=1 : projectile, iqq=2 : target |
| 1620 | c----------------------------------------------------------------------- |
| 1621 | include 'epos.inc' |
| 1622 | common /ar3/ x1(7),a1(7) |
| 1623 | external func |
| 1624 | |
| 1625 | ptgau=0. |
| 1626 | do i=1,7 |
| 1627 | do m=1,2 |
| 1628 | b=bm*sqrt(.5+x1(i)*(m-1.5)) |
| 1629 | ptgau=ptgau+func(b,iqq)*a1(i) |
| 1630 | enddo |
| 1631 | enddo |
| 1632 | ptgau=ptgau*bm**2*pi*.5 |
| 1633 | return |
| 1634 | end |
| 1635 | |
| 1636 | c------------------------------------------------------------------------ |
| 1637 | function ptgau1(bm,iqq) |
| 1638 | c----------------------------------------------------------------------- |
| 1639 | c impact parameter integration for impact parameters >bm - |
| 1640 | c for hadron-nucleus cross-sections calculation |
| 1641 | c iqq=1 : projectile, iqq=2 : target |
| 1642 | c----------------------------------------------------------------------- |
| 1643 | include 'epos.inc' |
| 1644 | common /ar5/ x5(2),a5(2) |
| 1645 | |
| 1646 | ptgau1=0. |
| 1647 | if(iqq.eq.1)then |
| 1648 | difn=difnuc(maproj) |
| 1649 | else |
| 1650 | difn=difnuc(matarg) |
| 1651 | endif |
| 1652 | do i=1,2 |
| 1653 | b=bm+x5(i)*difn |
| 1654 | ptgau1=ptgau1+ptfau(b,iqq)*a5(i)*exp(x5(i))*b*2.*pi*difn |
| 1655 | enddo |
| 1656 | return |
| 1657 | end |
| 1658 | c------------------------------------------------------------------------ |
| 1659 | function ptgau2(bm) |
| 1660 | c----------------------------------------------------------------------- |
| 1661 | c impact parameter integration for impact parameters >bm - |
| 1662 | c for nucleus-nucleus cross-sections calculation |
| 1663 | c----------------------------------------------------------------------- |
| 1664 | include 'epos.inc' |
| 1665 | common /ar5/ x5(2),a5(2) |
| 1666 | |
| 1667 | ptgau2=0. |
| 1668 | difn=difnuc(maproj)+difnuc(matarg) |
| 1669 | do i=1,2 |
| 1670 | b=bm+x5(i)*difn |
| 1671 | ptgau2=ptgau2+ptfauAA(b)*a5(i)*exp(x5(i))*b*2.*pi*difn |
| 1672 | enddo |
| 1673 | return |
| 1674 | end |
| 1675 | |
| 1676 | |
| 1677 | c------------------------------------------------------------------------ |
| 1678 | function ptfau(b,iqq) |
| 1679 | c----------------------------------------------------------------------- |
| 1680 | c ptfau - integrands for hadron-nucleus cross-sections calculation |
| 1681 | c iqq=1 : projectile, iqq=2 : target |
| 1682 | c----------------------------------------------------------------------- |
| 1683 | include 'epos.inc' |
| 1684 | common /psar35/ anorm,anormp |
| 1685 | |
| 1686 | call psfz(gz2,b) |
| 1687 | |
| 1688 | if(iqq.eq.1)then |
| 1689 | ptfau=1.-max(0.,(1.-anormp*gz2))**maproj |
| 1690 | else |
| 1691 | ptfau=1.-max(0.,(1.-anorm*gz2))**matarg |
| 1692 | endif |
| 1693 | |
| 1694 | return |
| 1695 | end |
| 1696 | |
| 1697 | c------------------------------------------------------------------------ |
| 1698 | function ptfauAA(b) |
| 1699 | c----------------------------------------------------------------------- |
| 1700 | c ptfau - integrands for hadron-nucleus cross-sections calculation |
| 1701 | c----------------------------------------------------------------------- |
| 1702 | include 'epos.inc' |
| 1703 | common /ar3/ x1(7),a1(7) |
| 1704 | common /psar35/ anorm,anormp |
| 1705 | external pprcs |
| 1706 | |
| 1707 | ptfauAA=0. |
| 1708 | e1=exp(-1.) |
| 1709 | rs=r2had(iclpro)+r2had(icltar)+max(slopom,slopoms)*log(engy**2) |
| 1710 | & +gwidth*(r2had(iclpro)+r2had(icltar)) |
| 1711 | & +bmxdif(iclpro,icltar)/4./0.0389 |
| 1712 | rpom=4.*.0389*rs |
| 1713 | do i1=1,7 |
| 1714 | do m=1,2 |
| 1715 | z=.5+x1(i1)*(m-1.5) |
| 1716 | zv1=exp(-z) |
| 1717 | zv2=(e1*z) |
| 1718 | b1=sqrt(-rpom*log(zv1)) |
| 1719 | b2=sqrt(-rpom*log(zv2)) |
| 1720 | call psfz(gz21,b1) |
| 1721 | call psfz(gz22,b2) |
| 1722 | ptfau1=max(0.,(1.-anorm*gz21))**matarg |
| 1723 | ptfau2=max(0.,(1.-anorm*gz22))**matarg |
| 1724 | cg1=ptrot(pprcs,b,b1) |
| 1725 | cg2=ptrot(pprcs,b,b2) |
| 1726 | ptfauAA=ptfauAA+a1(i1)*(cg1*(1.-ptfau1)+cg2*(1.-ptfau2)/z) |
| 1727 | enddo |
| 1728 | enddo |
| 1729 | ptfauAA=ptfauAA*rpom/2. |
| 1730 | ptfauAA=1.-max(0.,(1.-anormp*ptfauAA))**maproj |
| 1731 | |
| 1732 | return |
| 1733 | end |
| 1734 | |
| 1735 | c------------------------------------------------------------------------ |
| 1736 | function ptrot(func,s,b) |
| 1737 | c----------------------------------------------------------------------- |
| 1738 | c convolution of nuclear profile functions (axial angle integration) |
| 1739 | c----------------------------------------------------------------------- |
| 1740 | common /ar8/ x2(4),a2 |
| 1741 | external func |
| 1742 | |
| 1743 | ptrot=0. |
| 1744 | do i=1,4 |
| 1745 | sb1=b**2+s**2-2.*b*s*(2.*x2(i)-1.) |
| 1746 | sb2=b**2+s**2-2.*b*s*(1.-2.*x2(i)) |
| 1747 | ptrot=ptrot+(func(sb1)+func(sb2)) |
| 1748 | enddo |
| 1749 | ptrot=ptrot*a2 |
| 1750 | return |
| 1751 | end |
| 1752 | |
| 1753 | c------------------------------------------------------------------------ |
| 1754 | function pttcs(b0) |
| 1755 | c----------------------------------------------------------------------- |
| 1756 | c ptt - nuclear profile function value at imp param squared b*difnuc**2 |
| 1757 | c----------------------------------------------------------------------- |
| 1758 | include 'epos.inc' |
| 1759 | common /psar34/ rrr,rrrm |
| 1760 | common /ar5/ x5(2),a5(2) |
| 1761 | common /ar9/ x9(3),a9(3) |
| 1762 | |
| 1763 | b=b0/difnuc(matarg)**2 |
| 1764 | pttcs=0. |
| 1765 | zm=rrrm**2-b |
| 1766 | if(zm.gt.4.*b)then |
| 1767 | zm=sqrt(zm) |
| 1768 | else |
| 1769 | zm=2.*sqrt(b) |
| 1770 | endif |
| 1771 | |
| 1772 | do i=1,3 |
| 1773 | z1=zm*(1.+x9(i))*0.5 |
| 1774 | z2=zm*(1.-x9(i))*0.5 |
| 1775 | quq=sqrt(b+z1**2)-rrr |
| 1776 | if (quq.lt.85.)pttcs=pttcs+a9(i)/(1.+exp(quq)) |
| 1777 | quq=sqrt(b+z2**2)-rrr |
| 1778 | if (quq.lt.85.)pttcs=pttcs+a9(i)/(1.+exp(quq)) |
| 1779 | enddo |
| 1780 | pttcs=pttcs*zm*0.5 |
| 1781 | |
| 1782 | dt=0. |
| 1783 | do i=1,2 |
| 1784 | z1=x5(i)+zm |
| 1785 | quq=sqrt(b+z1**2)-rrr-x5(i) |
| 1786 | if (quq.lt.85.)dt=dt+a5(i)/(exp(-x5(i))+exp(quq)) |
| 1787 | enddo |
| 1788 | |
| 1789 | pttcs=pttcs+dt |
| 1790 | return |
| 1791 | end |
| 1792 | |
| 1793 | c------------------------------------------------------------------------ |
| 1794 | function pprcs(b0) |
| 1795 | c----------------------------------------------------------------------- |
| 1796 | c ptt - nuclear profile function value at imp param squared b*difnuc**2 |
| 1797 | c----------------------------------------------------------------------- |
| 1798 | include 'epos.inc' |
| 1799 | common /psar41/ rrrp,rrrmp |
| 1800 | common /ar5/ x5(2),a5(2) |
| 1801 | common /ar9/ x9(3),a9(3) |
| 1802 | |
| 1803 | b=b0/difnuc(maproj)**2 |
| 1804 | pprcs=0. |
| 1805 | zm=rrrmp**2-b |
| 1806 | if(zm.gt.4.*b)then |
| 1807 | zm=sqrt(zm) |
| 1808 | else |
| 1809 | zm=2.*sqrt(b) |
| 1810 | endif |
| 1811 | |
| 1812 | do i=1,3 |
| 1813 | z1=zm*(1.+x9(i))*0.5 |
| 1814 | z2=zm*(1.-x9(i))*0.5 |
| 1815 | quq=sqrt(b+z1**2)-rrrp |
| 1816 | if (quq.lt.85.)pprcs=pprcs+a9(i)/(1.+exp(quq)) |
| 1817 | quq=sqrt(b+z2**2)-rrrp |
| 1818 | if (quq.lt.85.)pprcs=pprcs+a9(i)/(1.+exp(quq)) |
| 1819 | enddo |
| 1820 | pprcs=pprcs*zm*0.5 |
| 1821 | |
| 1822 | dt=0. |
| 1823 | do i=1,2 |
| 1824 | z1=x5(i)+zm |
| 1825 | quq=sqrt(b+z1**2)-rrrp-x5(i) |
| 1826 | if (quq.lt.85.)dt=dt+a5(i)/(exp(-x5(i))+exp(quq)) |
| 1827 | enddo |
| 1828 | |
| 1829 | pprcs=pprcs+dt |
| 1830 | return |
| 1831 | end |
| 1832 | |
| 1833 | c------------------------------------------------------------------------------ |
| 1834 | function pscrse(ek,mapr,matg) |
| 1835 | c------------------------------------------------------------------------------ |
| 1836 | c hadron-nucleus (hadron-proton) and nucl-nucl particle production cross section |
| 1837 | c ek - lab kinetic energy for the interaction |
| 1838 | c maproj - projec mass number (1<maproj<64) |
| 1839 | c matarg - target mass number (1<matarg<64) |
| 1840 | c------------------------------------------------------------------------------ |
| 1841 | dimension wk(3),wa(3),wb(3) |
| 1842 | include 'epos.inc' |
| 1843 | common /psar33/ asect(7,4,7),asectn(7,7,7) |
| 1844 | common /psar34/ rrr,rrrm |
| 1845 | common /psar35/ anorm,anormp |
| 1846 | common /psar41/ rrrp,rrrmp |
| 1847 | external ptfau,ptfauAA |
| 1848 | |
| 1849 | pscrse=0. |
| 1850 | call idmass(1120,amt1) |
| 1851 | call idmass(1220,amt2) |
| 1852 | amtar=0.5*(amt1+amt2) |
| 1853 | if(matg.eq.1)amtar=amt1 |
| 1854 | if(mapr.eq.1)then |
| 1855 | call idmass(idproj,ampro) |
| 1856 | else |
| 1857 | ampro=amtar |
| 1858 | endif |
| 1859 | egy=ek+ampro |
| 1860 | c p=sqrt(max(0.,egy**2-ampro**2)) |
| 1861 | egy=sqrt( 2*egy*amtar+amtar**2+ampro**2 ) |
| 1862 | |
| 1863 | if(isetcs.le.1)then |
| 1864 | maprojsave=maproj |
| 1865 | matargsave=matarg |
| 1866 | engysave=engy |
| 1867 | maproj=mapr |
| 1868 | matarg=matg |
| 1869 | engy=egy |
| 1870 | if(matg.eq.1.and.mapr.eq.1)then |
| 1871 | call psfz(gz2,0.) |
| 1872 | gin=gz2*pi*10. |
| 1873 | elseif(mapr.eq.1)then |
| 1874 | rad=radnuc(matg) |
| 1875 | bm=rad+2. |
| 1876 | rrr=rad/difnuc(matg) |
| 1877 | rrrm=rrr+log(9.) |
| 1878 | anorm=1.5/pi/rrr**3/(1.+(pi/rrr)**2)/difnuc(matg)**2 |
| 1879 | gin=(ptgau(ptfau,bm,2)+ptgau1(bm,2))*10. !sig_in |
| 1880 | elseif(matg.eq.1)then |
| 1881 | rad=radnuc(mapr) |
| 1882 | bm=rad+2. |
| 1883 | rrrp=rad/difnuc(mapr) |
| 1884 | rrrmp=rrrp+log(9.) |
| 1885 | anormp=1.5/pi/rrrp**3/(1.+(pi/rrrp)**2)/difnuc(mapr)**2 |
| 1886 | gin=(ptgau(ptfau,bm,1)+ptgau1(bm,1))*10. !sig_in |
| 1887 | else |
| 1888 | rad=radnuc(matg)+1. |
| 1889 | radp=radnuc(mapr)+1. |
| 1890 | bm=rad+radp+2. |
| 1891 | rrr=rad/difnuc(matg) |
| 1892 | rrrm=rrr+log(9.) |
| 1893 | rrrp=radp/difnuc(mapr) |
| 1894 | rrrmp=rrrp+log(9.) |
| 1895 | anorm=1.5/pi/rrr**3/(1.+(pi/rrr)**2)/difnuc(matg)**2 |
| 1896 | anormp=1.5/pi/rrrp**3/(1.+(pi/rrrp)**2)/difnuc(mapr)**2 |
| 1897 | gin=(ptgau(ptfauAA,bm,2)+ptgau2(bm))*10. |
| 1898 | endif |
| 1899 | pscrse=gin |
| 1900 | maproj=maprojsave |
| 1901 | matarg=matargsave |
| 1902 | engy=engysave |
| 1903 | else |
| 1904 | ye=log10(max(1.,egy/1.5))+1. |
| 1905 | je=min(5,int(ye)) |
| 1906 | |
| 1907 | wk(2)=ye-je |
| 1908 | wk(3)=wk(2)*(wk(2)-1.)*.5 |
| 1909 | wk(1)=1.-wk(2)+wk(3) |
| 1910 | wk(2)=wk(2)-2.*wk(3) |
| 1911 | |
| 1912 | ya=matg |
| 1913 | ya=log(ya)/.69315+1. |
| 1914 | ja=min(int(ya),4) |
| 1915 | wa(2)=ya-ja |
| 1916 | wa(3)=wa(2)*(wa(2)-1.)*.5 |
| 1917 | wa(1)=1.-wa(2)+wa(3) |
| 1918 | wa(2)=wa(2)-2.*wa(3) |
| 1919 | |
| 1920 | if(mapr.eq.1)then |
| 1921 | |
| 1922 | do i=1,3 |
| 1923 | do m=1,3 |
| 1924 | pscrse=pscrse+asect(je+i-1,iclpro,ja+m-1)*wk(i)*wa(m) |
| 1925 | enddo |
| 1926 | enddo |
| 1927 | |
| 1928 | else |
| 1929 | |
| 1930 | yb=mapr |
| 1931 | yb=log(yb)/.69315+1. |
| 1932 | jb=min(int(yb),4) |
| 1933 | wb(2)=yb-jb |
| 1934 | wb(3)=wb(2)*(wb(2)-1.)*.5 |
| 1935 | wb(1)=1.-wb(2)+wb(3) |
| 1936 | wb(2)=wb(2)-2.*wb(3) |
| 1937 | |
| 1938 | do i=1,3 |
| 1939 | do m=1,3 |
| 1940 | do n=1,3 |
| 1941 | pscrse=pscrse+asectn(je+i-1,jb+n-1,ja+m-1)*wk(i)*wa(m)*wb(n) |
| 1942 | enddo |
| 1943 | enddo |
| 1944 | enddo |
| 1945 | |
| 1946 | endif |
| 1947 | |
| 1948 | pscrse=exp(pscrse) |
| 1949 | endif |
| 1950 | return |
| 1951 | end |
| 1952 | |
| 1953 | c------------------------------------------------------------------------------ |
| 1954 | function eposcrse(ek,mapro,matar,id) |
| 1955 | c------------------------------------------------------------------------------ |
| 1956 | c inelastic cross section of epos |
| 1957 | c (id=0 corresponds to air) |
| 1958 | c ek - kinetic energy for the interaction |
| 1959 | c maproj - projec mass number (1<maproj<64) |
| 1960 | c matarg - target mass number (1<matarg<64) |
| 1961 | c------------------------------------------------------------------------------ |
| 1962 | include 'epos.inc' |
| 1963 | |
| 1964 | eposcrse=0. |
| 1965 | if(id.eq.0)then |
| 1966 | do k=1,3 |
| 1967 | mt=int(airanxs(k)) |
| 1968 | eposcrse=eposcrse+airwnxs(k)*pscrse(ek,mapro,mt) |
| 1969 | enddo |
| 1970 | else |
| 1971 | eposcrse=pscrse(ek,mapro,matar) |
| 1972 | endif |
| 1973 | |
| 1974 | return |
| 1975 | end |
| 1976 | |
| 1977 | |
| 1978 | cc------------------------------------------------------------------------ |
| 1979 | c function pshard1(sy,xpp,xpm,z) |
| 1980 | cc----------------------------------------------------------------------- |
| 1981 | cc pshard - qq-pomeron eikonal |
| 1982 | cc sy - energy squared for the pomeron, |
| 1983 | cc xpp - lc+ for the pomeron, |
| 1984 | cc xpm - lc- for the pomeron |
| 1985 | cc----------------------------------------------------------------------- |
| 1986 | c common /ar3/ x1(7),a1(7) |
| 1987 | c common /ar9/ x9(3),a9(3) |
| 1988 | c include 'epos.inc' |
| 1989 | c include 'epos.incsem' |
| 1990 | c |
| 1991 | c pshard1=0. |
| 1992 | c if(iclpro.ne.4.and.icltar.ne.4)then |
| 1993 | c spmin=4.*q2min |
| 1994 | c else |
| 1995 | c spmin=4.*q2min+2.*qcmass**2 |
| 1996 | c endif |
| 1997 | c if(sy.le.spmin)return |
| 1998 | c |
| 1999 | c rp=r2had(iclpro)+r2had(icltar)+slopom*log(max(1.,sy)) |
| 2000 | c alpq=(alppar+1.)/2. |
| 2001 | c xmin=spmin/sy !min hard pomeron mass share |
| 2002 | c xminl=xmin**(delh+.5) |
| 2003 | c |
| 2004 | c do i=1,3 |
| 2005 | c do m=1,2 |
| 2006 | c zh=(.5*(1.+xminl-(2*m-3)*x9(i)*(1.-xminl)))**(1./(delh+.5)) |
| 2007 | c if(iclpro.ne.4.and.icltar.ne.4)then |
| 2008 | c call psjti0(zh*sy,sqq,sqqb,1,1) |
| 2009 | c call psjti0(zh*sy,sqqp,sqqpb,1,2) |
| 2010 | c call psjti0(zh*sy,sqaq,sqaqb,-1,1) |
| 2011 | c else |
| 2012 | c call psjti0(zh*sy,sqq,sqqb,4,1) |
| 2013 | c sqq=0. |
| 2014 | c sqaq=0. |
| 2015 | c endif |
| 2016 | c |
| 2017 | c stq=0. |
| 2018 | c do i1=1,3 |
| 2019 | c do m1=1,2 |
| 2020 | c xx=.5+x9(i1)*(m1-1.5) |
| 2021 | c xp=zh**xx |
| 2022 | c xm=zh/xp |
| 2023 | c if(xp*xpp.le..9999.and.xm*xpm.le..9999.or. |
| 2024 | c * xm*xpp.le..9999.and.xp*xpm.le..9999)then |
| 2025 | c stq=stq+a9(i1)*psharf(xp*xpp,xm*xpm,sqq,sqqp,sqaq) |
| 2026 | c * *(1.-xp)**(1.+alplea(iclpro)-alpq) |
| 2027 | c * *(1.-xm)**(1.+alplea(icltar)-alpq) |
| 2028 | c endif |
| 2029 | c enddo |
| 2030 | c enddo |
| 2031 | c pshard1=pshard1-a9(i)*stq/zh**(delh+0.5)*log(zh) |
| 2032 | c enddo |
| 2033 | c enddo |
| 2034 | c pshard1=pshard1*(1.-xminl)/(delh+.5)/4.*factk |
| 2035 | c **chad(iclpro)*chad(icltar)*(xpp*xpm)**(1.-alpq) |
| 2036 | c **z**(rp/(r2had(iclpro)+r2had(icltar))) |
| 2037 | c */(8.*pi*(r2had(iclpro)+r2had(icltar))) |
| 2038 | c return |
| 2039 | c end |
| 2040 | c |
| 2041 | c------------------------------------------------------------------------ |
| 2042 | function pshard(sy,xpp,xpm) |
| 2043 | c----------------------------------------------------------------------- |
| 2044 | c pshard - qq-pomeron eikonal |
| 2045 | c sy - energy squared for the pomeron, |
| 2046 | c xpp - lc+ for the pomeron, |
| 2047 | c xpm - lc- for the pomeron |
| 2048 | c----------------------------------------------------------------------- |
| 2049 | double precision z01 |
| 2050 | common /ar3/ x1(7),a1(7) |
| 2051 | include 'epos.inc' |
| 2052 | include 'epos.incsem' |
| 2053 | |
| 2054 | pshard=0. |
| 2055 | if(iclpro.ne.4.and.icltar.ne.4)then |
| 2056 | spmin=4.*q2min |
| 2057 | else |
| 2058 | spmin=4.*q2min+2.*qcmass**2 |
| 2059 | endif |
| 2060 | if(sy.le.spmin)return |
| 2061 | |
| 2062 | alpq=(alppar+1.)/2. |
| 2063 | xmin=spmin/sy !min hard pomeron mass share |
| 2064 | xminl=xmin**(delh+.5) |
| 2065 | |
| 2066 | do i=1,7 |
| 2067 | do m=1,2 |
| 2068 | zh=(.5*(1.+xminl-(2*m-3)*x1(i)*(1.-xminl)))**(1./(delh+.5)) |
| 2069 | if(iclpro.ne.4.and.icltar.ne.4)then |
| 2070 | call psjti0(zh*sy,sqq,sqqb,1,1) |
| 2071 | call psjti0(zh*sy,sqqp,sqqpb,1,2) |
| 2072 | call psjti0(zh*sy,sqaq,sqaqb,-1,1) |
| 2073 | else |
| 2074 | call psjti0(zh*sy,sqq,sqqb,4,1) |
| 2075 | sqqp=0. |
| 2076 | sqaq=0. |
| 2077 | endif |
| 2078 | |
| 2079 | stq=0. !int^1_(sqrt(z)) dx_p / x_p / sqrt(1-x_p) =int^(tmax)_(0) dt |
| 2080 | tmax=sqrt(1.-sqrt(zh)) !t=ln((1+sqrt(1-x_p))/(1-sqrt(1-x_p))) |
| 2081 | tmax=log((1.+tmax)/(1.-tmax)) |
| 2082 | if(tmax.gt.1.e-20)then |
| 2083 | do i1=1,7 |
| 2084 | do m1=1,2 |
| 2085 | t=tmax*(.5+x1(i1)*(m1-1.5)) |
| 2086 | z01=((1.d0-exp(-1.d0*t))/(1.d0+exp(-1.d0*t)))**2 |
| 2087 | xp=1.-z01 |
| 2088 | xm=zh/xp |
| 2089 | if(xp*xpp.le..9999.and.xm*xpm.le..9999.or. |
| 2090 | * xm*xpp.le..9999.and.xp*xpm.le..9999)then |
| 2091 | stq=stq+a1(i1)*(psharf(xp*xpp,xm*xpm,sqq,sqqp,sqaq)+ |
| 2092 | * psharf(xm*xpp,xp*xpm,sqq,sqqp,sqaq)) |
| 2093 | * *z01**(.5-alpq)/(1.-xm)**alpq |
| 2094 | endif |
| 2095 | enddo |
| 2096 | enddo |
| 2097 | stq=stq*tmax |
| 2098 | endif |
| 2099 | pshard=pshard+a1(i)*stq/zh**(delh+0.5) |
| 2100 | enddo |
| 2101 | enddo |
| 2102 | pshard=pshard*(1.-xminl)/(delh+.5)/4.* |
| 2103 | *utgam1(2.+alplea(iclpro)-alpq)/utgam1(1.+alplea(iclpro))/ |
| 2104 | *utgam1(1.-alpq)* |
| 2105 | *utgam1(2.+alplea(icltar)-alpq)/utgam1(1.+alplea(icltar))/ |
| 2106 | *utgam1(1.-alpq)* |
| 2107 | *chad(iclpro)*chad(icltar)/(8.*pi*(r2had(iclpro)+r2had(icltar)))* |
| 2108 | *(xpp*xpm)**(-alpq)/sy**delh |
| 2109 | return |
| 2110 | end |
| 2111 | |
| 2112 | c------------------------------------------------------------------------ |
| 2113 | function psharf(zh1,zh2,sqq,sqqp,sqaq) |
| 2114 | c----------------------------------------------------------------------- |
| 2115 | include 'epos.incsem' |
| 2116 | include 'epos.inc' |
| 2117 | |
| 2118 | alpq=(alppar+1.)/2. |
| 2119 | if(zh1.le..9999.and.zh2.le..9999)then |
| 2120 | uv1=psdfh4(zh1,q2min,0.,iclpro,1) |
| 2121 | dv1=psdfh4(zh1,q2min,0.,iclpro,2) |
| 2122 | uv2=psdfh4(zh2,q2min,0.,icltar,1) |
| 2123 | dv2=psdfh4(zh2,q2min,0.,icltar,2) |
| 2124 | if(iclpro.eq.2.and.icltar.eq.2)then !proton |
| 2125 | fff=sqq*(uv1*uv2+dv1*dv2)+sqqp*(uv1*dv2+dv1*uv2) |
| 2126 | elseif(iclpro.eq.1.or.icltar.eq.1)then !pion |
| 2127 | fff=sqq*uv1*uv2+sqaq*dv1*dv2+sqqp*(uv1*dv2+dv1*uv2) |
| 2128 | elseif(iclpro.eq.3.or.icltar.eq.3)then !kaon |
| 2129 | fff=sqq*uv1*uv2+sqqp*(uv1*dv2+dv1*uv2+dv1*dv2) |
| 2130 | elseif(iclpro.eq.4.or.icltar.eq.4)then !J/psi |
| 2131 | fff=sqq*uv1*(uv2+dv2) |
| 2132 | endif |
| 2133 | psharf=fff*(1.-zh1)**(-1.+alpq-alplea(iclpro))* |
| 2134 | * (1.-zh2)**(-1.+alpq-alplea(icltar)) |
| 2135 | else |
| 2136 | psharf=0. |
| 2137 | endif |
| 2138 | return |
| 2139 | end |
| 2140 | |
| 2141 | c------------------------------------------------------------------------ |
| 2142 | function psvin(sy,xpp,xpm,z,iqq) |
| 2143 | c----------------------------------------------------------------------- |
| 2144 | c psvin - contributions to the interaction eikonal |
| 2145 | c sy - energy squared for the hard interaction, |
| 2146 | c xpp - lc+ for the sh pomeron, |
| 2147 | c xpm - lc- for the sh pomeron, |
| 2148 | c z - impact parameter factor, z=exp(-b**2/4*rp), |
| 2149 | c iqq = 1 - gg, |
| 2150 | c iqq = 2 - qg, |
| 2151 | c iqq = 3 - gq, |
| 2152 | c iqq = 4 - qq, |
| 2153 | c iqq = 5 - gg(int), |
| 2154 | c iqq = 6 - gg(proj), |
| 2155 | c iqq = 7 - qg(proj), |
| 2156 | c iqq = 9 - total uncut-integrated, |
| 2157 | c iqq = 10 - total cut, |
| 2158 | c iqq = 14 - gg(int)|b=0, |
| 2159 | c iqq = 15 - <b^2*gg(int)>, |
| 2160 | c iqq = 16 - gg(proj)|b=0, |
| 2161 | c iqq = 17 - <b^2*gg(proj)>, |
| 2162 | c iqq = 18 - qg(proj)|b=0, |
| 2163 | c iqq = 19 - <b^2*qg(proj)> |
| 2164 | c----------------------------------------------------------------------- |
| 2165 | dimension wk(3),wi(3),wj(3),wz(3),fa(3) |
| 2166 | common /psar2/ edmax,epmax |
| 2167 | common /psar4/ fhgg(11,10,8),fhqg(11,10,80) |
| 2168 | *,fhgq(11,10,80),fhqq(11,10,80),fhgg0(11,10),fhgg1(11,10,4) |
| 2169 | *,fhqg1(11,10,40),fhgg01(11),fhgg02(11),fhgg11(11,4) |
| 2170 | *,fhgg12(11,4),fhqg11(11,10,4),fhqg12(11,10,4) |
| 2171 | *,ftoint(11,14,2,2,3) |
| 2172 | common /psar7/ delx,alam3p,gam3p |
| 2173 | include 'epos.inc' |
| 2174 | include 'epos.incsem' |
| 2175 | |
| 2176 | if(iqq.eq.3)then |
| 2177 | xp=xpm |
| 2178 | xm=xpp |
| 2179 | iclp=icltar |
| 2180 | iclt=iclpro |
| 2181 | else |
| 2182 | xp=xpp |
| 2183 | xm=xpm |
| 2184 | iclp=iclpro |
| 2185 | iclt=icltar |
| 2186 | endif |
| 2187 | rp=r2had(iclpro)+r2had(icltar)+slopom*log(max(1.,sy)) |
| 2188 | |
| 2189 | psvin=0. |
| 2190 | if(iqq.eq.1.or.iqq.eq.5.or.iqq.eq.6.or.iqq.eq.14 |
| 2191 | *.or.iqq.eq.15.or.iqq.eq.16.or.iqq.eq.17 |
| 2192 | *.or.iclpro.ne.4.and.(iqq.eq.2.or.iqq.eq.7 |
| 2193 | *.or.iqq.eq.18.or.iqq.eq.19) |
| 2194 | *.or.icltar.ne.4.and.iqq.eq.3 |
| 2195 | *.or.iclpro.ne.4.and.icltar.ne.4)then |
| 2196 | spmin=4.*q2min |
| 2197 | else |
| 2198 | spmin=4.*q2min+2.*qcmass**2 |
| 2199 | endif |
| 2200 | if(sy.le.spmin.and.(iqq.le.7.or.iqq.gt.13))return |
| 2201 | |
| 2202 | if(iqq.le.7.or.iqq.gt.13)then |
| 2203 | yl=log(sy/spmin)/log(epmax/2./spmin)*10.+1 |
| 2204 | k=int(yl) |
| 2205 | if(k.gt.9)k=9 |
| 2206 | wk(2)=yl-k |
| 2207 | wk(3)=wk(2)*(wk(2)-1.)*.5 |
| 2208 | wk(1)=1.-wk(2)+wk(3) |
| 2209 | wk(2)=wk(2)-2.*wk(3) |
| 2210 | |
| 2211 | if(iqq.ne.4)then !---------------- not 4 ------------------ |
| 2212 | |
| 2213 | if(iqq.eq.5)then |
| 2214 | if(k.eq.1)then |
| 2215 | psvin=max(0.,exp(fhgg01(k+1))*wk(2) |
| 2216 | * +exp(fhgg01(k+2))*wk(3)) |
| 2217 | else |
| 2218 | psvin=exp(fhgg01(k)*wk(1)+fhgg01(k+1)*wk(2) |
| 2219 | * +fhgg01(k+2)*wk(3)) |
| 2220 | endif |
| 2221 | psvin=psvin*factk*sy**delh |
| 2222 | return |
| 2223 | |
| 2224 | elseif(iqq.eq.15)then |
| 2225 | if(k.eq.1)then |
| 2226 | psvin=max(0.,exp(fhgg02(k+1))*wk(2) |
| 2227 | * +exp(fhgg02(k+2))*wk(3)) |
| 2228 | else |
| 2229 | psvin=exp(fhgg02(k)*wk(1)+fhgg02(k+1)*wk(2) |
| 2230 | * +fhgg02(k+2)*wk(3)) |
| 2231 | endif |
| 2232 | psvin=psvin*factk*sy**delh |
| 2233 | return |
| 2234 | |
| 2235 | elseif(iqq.eq.6)then |
| 2236 | if(k.eq.1)then |
| 2237 | psvin=max(0.,exp(fhgg11(k+1,iclpro))*wk(2) |
| 2238 | * +exp(fhgg11(k+2,iclpro))*wk(3)) |
| 2239 | else |
| 2240 | psvin=exp(fhgg11(k,iclpro)*wk(1)+fhgg11(k+1,iclpro)*wk(2) |
| 2241 | * +fhgg11(k+2,iclpro)*wk(3)) |
| 2242 | endif |
| 2243 | psvin=psvin*factk*sy**delh*xp**(-alppar) |
| 2244 | return |
| 2245 | |
| 2246 | elseif(iqq.eq.17)then |
| 2247 | if(k.eq.1)then |
| 2248 | psvin=max(0.,exp(fhgg12(k+1,iclpro))*wk(2) |
| 2249 | * +exp(fhgg12(k+2,iclpro))*wk(3)) |
| 2250 | else |
| 2251 | psvin=exp(fhgg12(k,iclpro)*wk(1)+fhgg12(k+1,iclpro)*wk(2) |
| 2252 | * +fhgg12(k+2,iclpro)*wk(3)) |
| 2253 | endif |
| 2254 | psvin=psvin*factk*sy**delh*xp**(-alppar) |
| 2255 | return |
| 2256 | |
| 2257 | elseif(iqq.eq.7.or.iqq.eq.19)then |
| 2258 | if(xp.lt..2)then |
| 2259 | xl=log(10.*xp)/log(2.)+5. |
| 2260 | else |
| 2261 | xl=5.*xp+5. |
| 2262 | endif |
| 2263 | i=int(xl) |
| 2264 | if(i.lt.1)i=1 |
| 2265 | if(i.eq.5)i=4 |
| 2266 | if(i.gt.8)i=8 |
| 2267 | wi(2)=xl-i |
| 2268 | wi(3)=wi(2)*(wi(2)-1.)*.5 |
| 2269 | wi(1)=1.-wi(2)+wi(3) |
| 2270 | wi(2)=wi(2)-2.*wi(3) |
| 2271 | do k1=1,3 |
| 2272 | fa(k1)=0. |
| 2273 | do i1=1,3 |
| 2274 | k2=k+k1-1 |
| 2275 | if(iqq.eq.7)then |
| 2276 | fhhh=fhqg11(k2,i+i1-1,iclpro) |
| 2277 | elseif(iqq.eq.19)then |
| 2278 | fhhh=fhqg12(k2,i+i1-1,iclpro) |
| 2279 | endif |
| 2280 | fa(k1)=fa(k1)+fhhh*wi(i1) |
| 2281 | enddo |
| 2282 | enddo |
| 2283 | if(k.eq.1)then |
| 2284 | psvin=max(0.,exp(fa(2))*wk(2)+exp(fa(3))*wk(3)) |
| 2285 | else |
| 2286 | psvin=exp(fa(1)*wk(1)+fa(2)*wk(2)+fa(3)*wk(3)) |
| 2287 | endif |
| 2288 | psvin=psvin*factk*sy**delh |
| 2289 | return |
| 2290 | endif |
| 2291 | |
| 2292 | jz=int(10.*z) |
| 2293 | if(jz.gt.8)jz=8 |
| 2294 | if(jz.lt.1)jz=1 |
| 2295 | wz(2)=10.*z-jz |
| 2296 | wz(3)=wz(2)*(wz(2)-1.)*.5 |
| 2297 | wz(1)=1.-wz(2)+wz(3) |
| 2298 | wz(2)=wz(2)-2.*wz(3) |
| 2299 | |
| 2300 | if(iqq.eq.14)then |
| 2301 | do k1=1,3 |
| 2302 | k2=k+k1-1 |
| 2303 | fa(k1)=fhgg0(k2,jz)*wz(1)+fhgg0(k2,jz+1) |
| 2304 | * *wz(2)+fhgg0(k2,jz+2)*wz(3) |
| 2305 | enddo |
| 2306 | if(k.eq.1)then |
| 2307 | psvin=max(0.,exp(fa(2))*wk(2)+exp(fa(3))*wk(3)) |
| 2308 | else |
| 2309 | psvin=exp(fa(1)*wk(1)+fa(2)*wk(2)+fa(3)*wk(3)) |
| 2310 | endif |
| 2311 | psvin=psvin*z*factk*sy**delh |
| 2312 | |
| 2313 | elseif(iqq.eq.16)then |
| 2314 | do k1=1,3 |
| 2315 | k2=k+k1-1 |
| 2316 | fa(k1)=fhgg1(k2,jz,iclpro)*wz(1)+fhgg1(k2,jz+1,iclpro) |
| 2317 | * *wz(2)+fhgg1(k2,jz+2,iclpro)*wz(3) |
| 2318 | enddo |
| 2319 | if(k.eq.1)then |
| 2320 | psvin=max(0.,exp(fa(2))*wk(2)+exp(fa(3))*wk(3)) |
| 2321 | else |
| 2322 | psvin=exp(fa(1)*wk(1)+fa(2)*wk(2)+fa(3)*wk(3)) |
| 2323 | endif |
| 2324 | psvin=psvin*z*factk*sy**delh*xp**(-alppar) |
| 2325 | |
| 2326 | elseif(iqq.eq.18)then |
| 2327 | if(xp.lt..2)then |
| 2328 | xl=log(10.*xp)/log(2.)+5. |
| 2329 | else |
| 2330 | xl=5.*xp+5. |
| 2331 | endif |
| 2332 | i=int(xl) |
| 2333 | if(i.lt.1)i=1 |
| 2334 | if(i.eq.5)i=4 |
| 2335 | if(i.gt.8)i=8 |
| 2336 | wi(2)=xl-i |
| 2337 | wi(3)=wi(2)*(wi(2)-1.)*.5 |
| 2338 | wi(1)=1.-wi(2)+wi(3) |
| 2339 | wi(2)=wi(2)-2.*wi(3) |
| 2340 | do k1=1,3 |
| 2341 | fa(k1)=0. |
| 2342 | do i1=1,3 |
| 2343 | do l1=1,3 |
| 2344 | k2=k+k1-1 |
| 2345 | l2=jz+l1-1+10*(iclpro-1) |
| 2346 | fhhh=fhqg1(k2,i+i1-1,l2) |
| 2347 | fa(k1)=fa(k1)+fhhh*wi(i1)*wz(l1) |
| 2348 | enddo |
| 2349 | enddo |
| 2350 | enddo |
| 2351 | if(k.eq.1)then |
| 2352 | psvin=max(0.,exp(fa(2))*wk(2)+exp(fa(3))*wk(3)) |
| 2353 | else |
| 2354 | psvin=exp(fa(1)*wk(1)+fa(2)*wk(2)+fa(3)*wk(3)) |
| 2355 | endif |
| 2356 | psvin=psvin*z*factk*sy**delh |
| 2357 | |
| 2358 | elseif(iqq.eq.1)then !1111111111111111111111111111111111 |
| 2359 | |
| 2360 | do k1=1,3 |
| 2361 | k2=k+k1-1 |
| 2362 | iclpt=iclpro+4*(icltar-1) |
| 2363 | fa(k1)=fhgg(k2,jz,iclpt)*wz(1)+fhgg(k2,jz+1,iclpt) |
| 2364 | * *wz(2)+fhgg(k2,jz+2,iclpt)*wz(3) |
| 2365 | enddo |
| 2366 | if(k.eq.1)then |
| 2367 | psvin=max(0.,exp(fa(2))*wk(2)+exp(fa(3))*wk(3)) |
| 2368 | else |
| 2369 | psvin=exp(fa(1)*wk(1)+fa(2)*wk(2)+fa(3)*wk(3)) |
| 2370 | endif |
| 2371 | psvin=psvin*z*factk*sy**delh*(xp*xm)**(-alppar) |
| 2372 | |
| 2373 | else ! 2222222222222222222222 3333333333333333333333 .... |
| 2374 | |
| 2375 | if(xp.lt..2)then |
| 2376 | xl=log(10.*xp)/log(2.)+5. |
| 2377 | else |
| 2378 | xl=5.*xp+5. |
| 2379 | endif |
| 2380 | i=int(xl) |
| 2381 | if(i.lt.1)i=1 |
| 2382 | if(i.eq.5)i=4 |
| 2383 | if(i.gt.8)i=8 |
| 2384 | wi(2)=xl-i |
| 2385 | wi(3)=wi(2)*(wi(2)-1.)*.5 |
| 2386 | wi(1)=1.-wi(2)+wi(3) |
| 2387 | wi(2)=wi(2)-2.*wi(3) |
| 2388 | do k1=1,3 |
| 2389 | fa(k1)=0. |
| 2390 | do i1=1,3 |
| 2391 | do l1=1,3 |
| 2392 | k2=k+k1-1 |
| 2393 | if(iqq.eq.2)then |
| 2394 | l2=jz+l1-1+10*(iclpro+4*(icltar-1)-1) |
| 2395 | fhhh=fhqg(k2,i+i1-1,l2) |
| 2396 | elseif(iqq.eq.3)then |
| 2397 | l2=jz+l1-1+10*(iclpro+4*(icltar-1)-1) |
| 2398 | fhhh=fhgq(k2,i+i1-1,l2) |
| 2399 | endif |
| 2400 | fa(k1)=fa(k1)+fhhh*wi(i1)*wz(l1) |
| 2401 | enddo |
| 2402 | enddo |
| 2403 | enddo |
| 2404 | if(k.eq.1)then |
| 2405 | psvin=max(0.,exp(fa(2))*wk(2)+exp(fa(3))*wk(3)) |
| 2406 | else |
| 2407 | psvin=exp(fa(1)*wk(1)+fa(2)*wk(2)+fa(3)*wk(3)) |
| 2408 | endif |
| 2409 | psvin=psvin*xm**(-alppar)*z*factk*sy**delh |
| 2410 | endif |
| 2411 | |
| 2412 | else ! ------------- 4444444444444444444 ----------------------- |
| 2413 | |
| 2414 | if(xp.lt..2)then |
| 2415 | xl1=log(10.*xp)/log(2.)+5. |
| 2416 | else |
| 2417 | xl1=5.*xp+5. |
| 2418 | endif |
| 2419 | i=max(1,int(xl1)) |
| 2420 | if(i.eq.5)i=4 |
| 2421 | i=min(8,i) |
| 2422 | wi(2)=xl1-i |
| 2423 | wi(3)=wi(2)*(wi(2)-1.)*.5 |
| 2424 | wi(1)=1.-wi(2)+wi(3) |
| 2425 | wi(2)=wi(2)-2.*wi(3) |
| 2426 | |
| 2427 | if(xm.lt..2)then |
| 2428 | xl2=log(10.*xm)/log(2.)+5. |
| 2429 | else |
| 2430 | xl2=5.*xm+5. |
| 2431 | endif |
| 2432 | j=max(1,int(xl2)) |
| 2433 | if(j.eq.5)j=4 |
| 2434 | j=min(8,j) |
| 2435 | wj(2)=xl2-j |
| 2436 | wj(3)=wj(2)*(wj(2)-1.)*.5 |
| 2437 | wj(1)=1.-wj(2)+wj(3) |
| 2438 | wj(2)=wj(2)-2.*wj(3) |
| 2439 | |
| 2440 | do k1=1,3 |
| 2441 | fa(k1)=0. |
| 2442 | do i1=1,3 |
| 2443 | do j1=1,3 |
| 2444 | k2=k+k1-1 |
| 2445 | j2=j+j1-1+10*(iclp+4*(iclt-1)-1) |
| 2446 | fa(k1)=fa(k1)+fhqq(k2,i+i1-1,j2)*wi(i1)*wj(j1) |
| 2447 | enddo |
| 2448 | enddo |
| 2449 | enddo |
| 2450 | if(k.eq.1)then |
| 2451 | psvin=max(0.,exp(fa(2))*wk(2)+exp(fa(3))*wk(3)) |
| 2452 | else |
| 2453 | psvin=exp(fa(1)*wk(1)+fa(2)*wk(2)+fa(3)*wk(3)) |
| 2454 | endif |
| 2455 | psvin=psvin*z**(rp/(r2had(iclpro)+r2had(icltar)))* |
| 2456 | * factk*sy**delh |
| 2457 | |
| 2458 | endif !-------------------------------------------- |
| 2459 | |
| 2460 | return |
| 2461 | endif |
| 2462 | |
| 2463 | yl=log(sy)/log(1.e8)*10.+1 |
| 2464 | k=max(1,int(yl)) |
| 2465 | k=min(k,9) !?????????????9 |
| 2466 | wk(2)=yl-k |
| 2467 | wk(3)=wk(2)*(wk(2)-1.)*.5 |
| 2468 | wk(1)=1.-wk(2)+wk(3) |
| 2469 | wk(2)=wk(2)-2.*wk(3) |
| 2470 | |
| 2471 | if(z.gt..1)then |
| 2472 | zz=10.*z+4 |
| 2473 | else |
| 2474 | zz=50.*z |
| 2475 | endif |
| 2476 | jz=min(12,int(zz)) |
| 2477 | if(jz.eq.0)jz=1 |
| 2478 | if(jz.eq.4)jz=3 |
| 2479 | wz(2)=zz-jz |
| 2480 | wz(3)=wz(2)*(wz(2)-1.)*.5 |
| 2481 | wz(1)=1.-wz(2)+wz(3) |
| 2482 | wz(2)=wz(2)-2.*wz(3) |
| 2483 | |
| 2484 | if(iqq.eq.9)then |
| 2485 | do k1=1,3 |
| 2486 | do l1=1,3 |
| 2487 | k2=k+k1-1 |
| 2488 | l2=jz+l1-1 |
| 2489 | psvin=psvin+ftoint(k2,l2,icdp,icdt,iclp)*wk(k1)*wz(l1) |
| 2490 | enddo |
| 2491 | enddo |
| 2492 | psvin=exp(psvin)*z |
| 2493 | |
| 2494 | endif |
| 2495 | return |
| 2496 | end |
| 2497 | |
| 2498 | c------------------------------------------------------------------------ |
| 2499 | function psbint(q1,q2,qqcut,ss,m1,l1,jdis) |
| 2500 | c----------------------------------------------------------------------- |
| 2501 | c psbint - born cross-section interpolation |
| 2502 | c q1 - virtuality cutoff at current end of the ladder; |
| 2503 | c q2 - virtuality cutoff at opposite end of the ladder; |
| 2504 | c qqcut - p_t cutoff for the born process; |
| 2505 | c s - total c.m. energy squared for the scattering, |
| 2506 | c m1 - parton type at current end of the ladder (0 - g, 1,-1,2,... - q) |
| 2507 | c l1 - parton type at opposite end of the ladder (0 - g, 1,-1,2,... - q) |
| 2508 | c----------------------------------------------------------------------- |
| 2509 | dimension wi(3),wk(3) |
| 2510 | common /psar2/ edmax,epmax |
| 2511 | common /psar21/ csbor(20,160,2) |
| 2512 | include 'epos.incsem' |
| 2513 | double precision psuds |
| 2514 | |
| 2515 | psbint=0. |
| 2516 | if(jdis.eq.0)then |
| 2517 | qq=max(q1,q2) |
| 2518 | else |
| 2519 | qq=max(q1/4.,q2) |
| 2520 | endif |
| 2521 | qq=max(qq,qqcut) |
| 2522 | if(iabs(m1).ne.4)then |
| 2523 | q2mass=0. |
| 2524 | if(m1.ne.0.and.m1.eq.l1)then |
| 2525 | m=2 |
| 2526 | l=2 |
| 2527 | elseif(m1.ne.0.and.m1.eq.-l1)then |
| 2528 | m=3 |
| 2529 | l=1 |
| 2530 | elseif(m1.ne.0.and.l1.ne.0.and.m1.ne.l1)then |
| 2531 | m=3 |
| 2532 | l=2 |
| 2533 | else |
| 2534 | m=min(1,iabs(m1))+1 |
| 2535 | l=min(1,iabs(l1))+1 |
| 2536 | endif |
| 2537 | else |
| 2538 | q2mass=qcmass**2 |
| 2539 | m=4 |
| 2540 | l=min(1,iabs(l1))+1 |
| 2541 | endif |
| 2542 | s=ss-q2mass |
| 2543 | spmin=4.*q2min+q2mass |
| 2544 | s2min=4.*qq+q2mass |
| 2545 | if(s.le.s2min)return |
| 2546 | |
| 2547 | p1=s/(1.+q2mass/s) |
| 2548 | if(p1.gt.4.*qq)then |
| 2549 | tmin=2.*qq/(1.+sqrt(1.-4.*qq/p1)) |
| 2550 | else |
| 2551 | tmin=2.*qq |
| 2552 | endif |
| 2553 | qmax=p1/4. |
| 2554 | tmax=p1/2. |
| 2555 | |
| 2556 | ml=20*(m-1)+80*(l-1) |
| 2557 | qli=log(qq/q2min)/log(qmax/q2min)*19.+1. |
| 2558 | sl=log(s/spmin)/log(epmax/2./spmin)*19.+1. |
| 2559 | k=int(sl) |
| 2560 | i=int(qli) |
| 2561 | if(k.lt.1)k=1 |
| 2562 | if(i.lt.1)i=1 |
| 2563 | if(k.gt.18)k=18 |
| 2564 | if(i.gt.18)i=18 |
| 2565 | |
| 2566 | wi(2)=qli-i |
| 2567 | wi(3)=wi(2)*(wi(2)-1.)*.5 |
| 2568 | wi(1)=1.-wi(2)+wi(3) |
| 2569 | wi(2)=wi(2)-2.*wi(3) |
| 2570 | |
| 2571 | wk(2)=sl-k |
| 2572 | wk(3)=wk(2)*(wk(2)-1.)*.5 |
| 2573 | wk(1)=1.-wk(2)+wk(3) |
| 2574 | wk(2)=wk(2)-2.*wk(3) |
| 2575 | |
| 2576 | do i1=1,3 |
| 2577 | do k1=1,3 |
| 2578 | psbint=psbint+csbor(i+i1-1,k+k1+ml-1,jdis+1) |
| 2579 | * *wi(i1)*wk(k1) |
| 2580 | enddo |
| 2581 | enddo |
| 2582 | psbint=exp(psbint)*(1./tmin-1./tmax) |
| 2583 | if(jdis.eq.0.and.qq.gt.q1)then |
| 2584 | psbint=psbint*sngl(psuds(qq,m1)/psuds(q1,m1)) |
| 2585 | elseif(jdis.eq.1.and.4.*qq.gt.q1)then |
| 2586 | psbint=psbint*sngl(psuds(4.*qq,m1)/psuds(q1,m1)) |
| 2587 | endif |
| 2588 | if(qq.gt.q2)psbint=psbint*sngl(psuds(qq,l1)/psuds(q2,l1)) |
| 2589 | return |
| 2590 | end |
| 2591 | |
| 2592 | c----------------------------------------------------------------------- |
| 2593 | function psborn(q1,q2,qqcut,s,j,l,jdis,md) |
| 2594 | c----------------------------------------------------------------------- |
| 2595 | c |
| 2596 | c hard 2->2 parton scattering born cross-section |
| 2597 | c including sudakov on both sides |
| 2598 | c |
| 2599 | c q1 - virtuality cutoff at current end of the ladder; |
| 2600 | c q2 - virtuality cutoff at opposite end of the ladder; |
| 2601 | c qqcut - p_t cutoff for the born process; |
| 2602 | c s - c.m. energy squared for the scattering; |
| 2603 | c j - parton type at current end of the ladder (0 - g, 1,2 etc. - q); |
| 2604 | c l - parton type at opposite end of the ladder (0 - g, 1,2 etc. - q). |
| 2605 | c----------------------------------------------------------------------- |
| 2606 | common /ar3/ x1(7),a1(7) |
| 2607 | double precision sud0,psbornd,psuds |
| 2608 | include 'epos.inc' |
| 2609 | include 'epos.incsem' |
| 2610 | |
| 2611 | psborn=0 |
| 2612 | |
| 2613 | if(jdis.eq.0)then |
| 2614 | qq=max(q1,q2) |
| 2615 | else |
| 2616 | qq=max(q1/4.,q2) |
| 2617 | endif |
| 2618 | qq=max(qq,qqcut) |
| 2619 | c if(j.ne.3)then !kkkkkkkkkk charm is 3 ??? |
| 2620 | if(j.ne.4)then |
| 2621 | j1=j |
| 2622 | q2mass=0. |
| 2623 | else |
| 2624 | j1=4 |
| 2625 | q2mass=qcmass**2 |
| 2626 | endif |
| 2627 | p1=s/(1.+q2mass/s) |
| 2628 | if(p1.gt.4.*qq)then |
| 2629 | tmin=2.*qq/(1.+sqrt(1.-4.*qq/p1)) |
| 2630 | else |
| 2631 | tmin=2.*qq |
| 2632 | ! return !tmin=2.*qq !kkkkkkk !????????????? tp why not ? |
| 2633 | endif |
| 2634 | tmax=p1/2. |
| 2635 | sud0=psuds(q1,j1)*psuds(q2,l) |
| 2636 | |
| 2637 | psbornd=0.d0 |
| 2638 | do i=1,7 |
| 2639 | do m=1,2 |
| 2640 | t=2.*tmin/(1.+tmin/tmax-x1(i)*(2*m-3) |
| 2641 | & *(1.-tmin/tmax)) |
| 2642 | qt=t*(1.-t/p1) |
| 2643 | if(qt.lt..999*qq.and.ish.ge.1)write(ifch,*)'psborn:qt,qq,q1,q2' |
| 2644 | & ,qq,qt,q1,q2 |
| 2645 | |
| 2646 | if(jdis.eq.0)then |
| 2647 | scale=qt |
| 2648 | else |
| 2649 | scale=qt*4. |
| 2650 | endif |
| 2651 | if(j1.eq.0.and.l.eq.0)then |
| 2652 | fb=ffborn(s,t, 1. , 0. , 0. , 0. , 0. ) !gg |
| 2653 | elseif(j1*l.eq.0)then |
| 2654 | fb=ffborn(s,t, 0. , 1. , 0. , 0. , 0.) !qg |
| 2655 | elseif(j1.eq.l)then |
| 2656 | fb=ffborn(s,t, 0. , 0. , 1. , 0. , 0.) !qq |
| 2657 | elseif(j1.eq.-l)then |
| 2658 | fb=ffborn(s,t, 0. , 0. , 0. , 1. , 0.) !qq |
| 2659 | else |
| 2660 | fb=ffborn(s,t, 0. , 0. , 0. , 0. , 1.) !qq |
| 2661 | endif |
| 2662 | fb=fb*pssalf(qt/qcdlam)**2 |
| 2663 | psbornd=psbornd+dble(a1(i)*fb)*dble(t)**2 |
| 2664 | & *psuds(scale,j1)*psuds(qt,l) |
| 2665 | enddo |
| 2666 | enddo |
| 2667 | psbornd=psbornd*dble(2.*pi**3)/dble(s)**2/sud0*2 |
| 2668 | * /2 !CS for parton pair |
| 2669 | if(md.eq.1)psbornd=psbornd*(1./tmin-1./tmax) |
| 2670 | psborn=sngl(psbornd) |
| 2671 | return |
| 2672 | end |
| 2673 | |
| 2674 | c------------------------------------------------------------------------ |
| 2675 | function psdgh(s,qq,long) |
| 2676 | c----------------------------------------------------------------------- |
| 2677 | c psdgh |
| 2678 | c s - energy squared for the interaction (hadron-hadron), |
| 2679 | c----------------------------------------------------------------------- |
| 2680 | common/ar3/ x1(7),a1(7) |
| 2681 | common /cnsta/ pi,pii,hquer,prom,piom,ainfin |
| 2682 | include 'epos.incsem' |
| 2683 | double precision psuds |
| 2684 | |
| 2685 | xd=qq/s |
| 2686 | if(long.eq.0)then |
| 2687 | psdgh=(psdfh4(xd,q2min,0.,2,1)/2.25+psdfh4(xd,q2min,0.,2,2)/9. |
| 2688 | * +psdfh4(xd,q2min,0.,2,3)/9.+ |
| 2689 | * 2.*(psdfh4(xd,q2min,0.,2,-1)+psdfh4(xd,q2min,0.,2,-2)+ |
| 2690 | * psdfh4(xd,q2min,0.,2,-3))/4.5) |
| 2691 | * *sngl(psuds(qq,1)/psuds(q2min,1))*4.*pi**2*alfe/qq |
| 2692 | else |
| 2693 | psdgh=0. |
| 2694 | endif |
| 2695 | |
| 2696 | dgh=0. |
| 2697 | if(long.eq.0)then |
| 2698 | s2min=qq/(1.-q2ini/qq) |
| 2699 | else |
| 2700 | s2min=4.*max(q2min,qcmass**2)+qq |
| 2701 | s2min=s2min/(1.-4.*q2ini/(s2min-qq)) |
| 2702 | endif |
| 2703 | xmin=s2min/s |
| 2704 | |
| 2705 | if(xmin.lt.1.)then |
| 2706 | do i=1,7 !numerical integration over z1 |
| 2707 | do m=1,2 |
| 2708 | if(long.eq.0)then |
| 2709 | z1=qq/s+(xmin-qq/s)*((1.-qq/s)/(xmin-qq/s)) |
| 2710 | * **(.5+(m-1.5)*x1(i)) |
| 2711 | else |
| 2712 | z1=.5*(1.+xmin+(2*m-3)*x1(i)*(1.-xmin)) |
| 2713 | endif |
| 2714 | call psdint(z1*s,qq,sds,sdn,sdb,sdt,sdr,1,long) |
| 2715 | call psdint(z1*s,qq,sdsg,sdng,sdbg,sdtg,sdrg,0,long) |
| 2716 | tu=psdfh4(z1,q2min,0.,2,1) |
| 2717 | td=psdfh4(z1,q2min,0.,2,2) |
| 2718 | ts=psdfh4(z1,q2min,0.,2,3) |
| 2719 | tg=psdfh4(z1,q2min,0.,2,0) |
| 2720 | tsea=2.*(psdfh4(z1,q2min,0.,2,-1)+psdfh4(z1,q2min,0.,2,-2) |
| 2721 | * +psdfh4(z1,q2min,0.,2,-3)) |
| 2722 | gy=sdn*(tu/2.25+td/9.+ts/9.+tsea/4.5)+sdtg*tg/4.5 |
| 2723 | * +sdt*(tu+td+ts+tsea)/4.5 |
| 2724 | dgh=dgh+a1(i)*gy*(1.-qq/s/z1) |
| 2725 | enddo |
| 2726 | enddo |
| 2727 | dgh=dgh*log((1.-qq/s)/(xmin-qq/s))*.5 |
| 2728 | endif |
| 2729 | psdgh=psdgh+dgh |
| 2730 | return |
| 2731 | end |
| 2732 | |
| 2733 | c------------------------------------------------------------------------ |
| 2734 | function psdh(s,qq,iclpro0,long) |
| 2735 | c----------------------------------------------------------------------- |
| 2736 | c pshard - hard quark-quark interaction cross-section |
| 2737 | c s - energy squared for the interaction (hadron-hadron), |
| 2738 | c iclpro0 - type of the primary hadron (nucleon) |
| 2739 | c----------------------------------------------------------------------- |
| 2740 | common /ar3/ x1(7),a1(7) |
| 2741 | include 'epos.incsem' |
| 2742 | include 'epos.inc' |
| 2743 | double precision psuds |
| 2744 | |
| 2745 | xd=qq/s |
| 2746 | qqs=q2min |
| 2747 | if(long.eq.0.and.(idisco.eq.0.or.idisco.eq.1))then |
| 2748 | psdh=(psdfh4(xd,qqs,0.,iclpro0,1)/2.25+ |
| 2749 | * psdfh4(xd,qqs,0.,iclpro0,2)/9.) |
| 2750 | * *sngl(psuds(qq,1)/psuds(qqs,1)) |
| 2751 | * *4.*pi**2*alfe/qq |
| 2752 | else |
| 2753 | psdh=0. |
| 2754 | endif |
| 2755 | |
| 2756 | dh=0. |
| 2757 | if(long.eq.0)then |
| 2758 | s2min=qq/(1.-q2ini/qq) |
| 2759 | else |
| 2760 | s2min=4.*max(q2min,qcmass**2)+qq |
| 2761 | s2min=s2min/(1.-4.*q2ini/(s2min-qq)) |
| 2762 | endif |
| 2763 | xmin=s2min/s |
| 2764 | if(xmin.lt.1.)then |
| 2765 | do i=1,7 !numerical integration over z1 |
| 2766 | do m=1,2 |
| 2767 | if(long.eq.0)then |
| 2768 | z1=qq/s+(xmin-qq/s)*((1.-qq/s)/(xmin-qq/s)) |
| 2769 | * **(.5+(m-1.5)*x1(i)) |
| 2770 | else |
| 2771 | z1=.5*(1.+xmin+(2*m-3)*x1(i)*(1.-xmin)) |
| 2772 | endif |
| 2773 | call psdint(z1*s,qq,sds,sdn,sdb,sdt,sdr,1,long) |
| 2774 | tu=psdfh4(z1,qqs,0.,iclpro0,1) |
| 2775 | td=psdfh4(z1,qqs,0.,iclpro0,2) |
| 2776 | gy=sdt*(tu+td)/4.5+sdn*(tu/2.25+td/9.) |
| 2777 | if(long.eq.0)then |
| 2778 | gy=gy*(1.-qq/s/z1) |
| 2779 | else |
| 2780 | gy=gy/z1 |
| 2781 | endif |
| 2782 | dh=dh+a1(i)*gy |
| 2783 | enddo |
| 2784 | enddo |
| 2785 | if(long.eq.0)then |
| 2786 | dh=dh*log((1.-qq/s)/(xmin-qq/s))*.5 |
| 2787 | else |
| 2788 | dh=dh*(1.-xmin)*.5 |
| 2789 | endif |
| 2790 | endif |
| 2791 | psdh=psdh+dh |
| 2792 | return |
| 2793 | end |
| 2794 | |
| 2795 | c------------------------------------------------------------------------ |
| 2796 | function psdsh(s,qq,iclpro0,dqsh,long) |
| 2797 | c----------------------------------------------------------------------- |
| 2798 | c psdsh - semihard interaction eikonal |
| 2799 | c s - energy squared for the interaction (hadron-hadron), |
| 2800 | c iclpro0 - hadron class, |
| 2801 | c z - impact parameter factor, z=exp(-b**2/rp), |
| 2802 | c iqq - type of the hard interaction (0 - gg, 1 - qg, 2 - gq) |
| 2803 | c----------------------------------------------------------------------- |
| 2804 | common /ar3/ x1(7),a1(7) |
| 2805 | include 'epos.inc' |
| 2806 | include 'epos.incsem' |
| 2807 | double precision psuds |
| 2808 | |
| 2809 | xd=qq/s |
| 2810 | if(long.eq.0.and.(idisco.eq.0.or.idisco.eq.1))then |
| 2811 | dqsh=fzeroSeaZZ(xd,iclpro0)/xd**dels |
| 2812 | * *rr*4.*pi*gamhad(iclpro0)/ |
| 2813 | * 4.5*sngl(psuds(qq,1)/psuds(q2min,1)) |
| 2814 | * *4.*pi**2*alfe/qq |
| 2815 | else |
| 2816 | dqsh=0. |
| 2817 | endif |
| 2818 | |
| 2819 | if(long.eq.0)then |
| 2820 | s2min=qq/(1.-q2ini/qq) |
| 2821 | else |
| 2822 | s2min=qq+4.*max(q2min,qcmass**2) |
| 2823 | endif |
| 2824 | xmin=s2min/s |
| 2825 | xmin=xmin**(delh-dels) |
| 2826 | dsh=0. |
| 2827 | if(xmin.lt.1.)then |
| 2828 | c numerical integration over z1 |
| 2829 | do i=1,7 |
| 2830 | do m=1,2 |
| 2831 | z1=(.5*(1.+xmin-(2*m-3)*x1(i)*(1.-xmin)))**(1./ |
| 2832 | * (delh-dels)) |
| 2833 | call psdint(z1*s,qq,sdsg,sdng,sdbg,sdtg,sdrg,0,long) |
| 2834 | call psdint(z1*s,qq,sdsq,sdnq,sdbq,sdtq,sdrq,1,long) |
| 2835 | dsh=dsh+a1(i)/z1**delh*(sdtg*fzeroGluZZ(z1,iclpro0) |
| 2836 | * +(sdtq+sdnq)*fzeroSeaZZ(z1,iclpro0)) |
| 2837 | enddo |
| 2838 | enddo |
| 2839 | dsh=dsh*(1.-xmin)/(delh-dels)/2. |
| 2840 | endif |
| 2841 | psdsh=dqsh+dsh*rr*4.*pi*gamhad(iclpro0)/4.5 !*ccorr(1,1,iclpro0) |
| 2842 | return |
| 2843 | end |
| 2844 | |
| 2845 | c------------------------------------------------------------------------ |
| 2846 | function psdsh1(s,qq,iclpro0,dqsh,long) |
| 2847 | c----------------------------------------------------------------------- |
| 2848 | c psdsh - semihard interaction eikonal |
| 2849 | c s - energy squared for the interaction (hadron-hadron), |
| 2850 | c iclpro0 - hadron class, |
| 2851 | c z - impact parameter factor, z=exp(-b**2/rp), |
| 2852 | c iqq - type of the hard interaction (0 - gg, 1 - qg, 2 - gq) |
| 2853 | c----------------------------------------------------------------------- |
| 2854 | common /ar3/ x1(7),a1(7) |
| 2855 | include 'epos.inc' |
| 2856 | include 'epos.incsem' |
| 2857 | c double precision psuds |
| 2858 | |
| 2859 | psdsh1=0. !only for plotting in psaevp : not use any more |
| 2860 | |
| 2861 | c$$$ xd=qq/s |
| 2862 | c$$$ write(ifch,*)'Psdsh1 for xd,qq',xd,qq |
| 2863 | c$$$ if(long.eq.0.and.(idisco.eq.0.or.idisco.eq.1))then |
| 2864 | c$$$ dqsh=psftist(xd)/4.5*sngl(psuds(qq,1)/psuds(q2min,1)) |
| 2865 | c$$$ * *4.*pi**2*alfe/qq |
| 2866 | c$$$ else |
| 2867 | c$$$ dqsh=0. |
| 2868 | c$$$ endif |
| 2869 | c$$$ |
| 2870 | c$$$ if(long.eq.0)then |
| 2871 | c$$$ s2min=qq/(1.-q2ini/qq) |
| 2872 | c$$$ else |
| 2873 | c$$$ s2min=qq+4.*max(q2min,qcmass**2) |
| 2874 | c$$$ endif |
| 2875 | c$$$ xmin=s2min/s |
| 2876 | c$$$ xmin=xmin**(delh-dels) |
| 2877 | c$$$ dsh=0. |
| 2878 | c$$$ if(xmin.lt.1.)then |
| 2879 | c$$$c numerical integration over z1 |
| 2880 | c$$$ do i=1,7 |
| 2881 | c$$$ do m=1,2 |
| 2882 | c$$$ z1=(.5*(1.+xmin-(2*m-3)*x1(i)*(1.-xmin)))**(1./ |
| 2883 | c$$$ * (delh-dels)) |
| 2884 | c$$$ call psdint(z1*s,qq,sdsg,sdng,sdbg,sdtg,sdrg,0,long) |
| 2885 | c$$$ call psdint(z1*s,qq,sdsq,sdnq,sdbq,sdtq,sdrq,1,long) |
| 2886 | c$$$ dsh=dsh+a1(i)/z1**delh*(sdtg*psftigt(z1) |
| 2887 | c$$$ * +(sdtq+sdnq)*psftist(z1))*z1**dels |
| 2888 | c$$$ enddo |
| 2889 | c$$$ enddo |
| 2890 | c$$$ dsh=dsh*(1.-xmin)/(delh-dels)/2. |
| 2891 | c$$$ endif |
| 2892 | c$$$ psdsh1=dqsh+dsh/4.5 |
| 2893 | return |
| 2894 | end |
| 2895 | |
| 2896 | |
| 2897 | c------------------------------------------------------------------------ |
| 2898 | function psev0(q1,qq,xx,j) |
| 2899 | c----------------------------------------------------------------------- |
| 2900 | double precision xx,psuds,psev00 |
| 2901 | common /ar3/ x1(7),a1(7) |
| 2902 | include 'epos.incsem' |
| 2903 | |
| 2904 | psev0=0. |
| 2905 | psev00=0.d0 |
| 2906 | do i=1,7 |
| 2907 | do m=1,2 |
| 2908 | if(j.eq.1)then !g->q |
| 2909 | qi=2.*q1/(1.+q1/qq+(1.-q1/qq)*(2.*m-3.)*x1(i)) |
| 2910 | psev00=psev00+a1(i)*qi*psuds(qi,0)/psuds(qi,1) |
| 2911 | * /log(qi*(1.d0-xx)/qcdlam) |
| 2912 | else !q->g |
| 2913 | qi=(.5*(q1+qq+(q1-qq)*(2.*m-3.)*x1(i))) |
| 2914 | psev00=psev00+a1(i)/qi/psuds(qi,0)*psuds(qi,1) |
| 2915 | * /log(qi*(1.d0-xx)/qcdlam) |
| 2916 | endif |
| 2917 | enddo |
| 2918 | enddo |
| 2919 | |
| 2920 | if(j.eq.1)then |
| 2921 | psev00=psev00*(1.d0/q1-1.d0/qq)*psuds(qq,1)/psuds(qq,0)/2.d0 |
| 2922 | else |
| 2923 | psev00=psev00*(qq-q1)*psuds(qq,0)/psuds(qq,1)/2.d0 |
| 2924 | endif |
| 2925 | psev00=psev00/log(log(qq*(1.d0-xx)/qcdlam) |
| 2926 | & /log(q1*(1.d0-xx)/qcdlam)) |
| 2927 | psev0=sngl(psev00) |
| 2928 | return |
| 2929 | end |
| 2930 | |
| 2931 | c------------------------------------------------------------------------ |
| 2932 | function psev(q1,qq,xx,j,l,n) |
| 2933 | c------------------------------------------------------------------------ |
| 2934 | double precision xx,zmax,zmax1,zmin,zmin1,z,psuds,fk,fq |
| 2935 | &,fz1,fz2 |
| 2936 | common /ar3/ x1(7),a1(7) |
| 2937 | include 'epos.incsem' |
| 2938 | |
| 2939 | zmax=1.d0-q2ini/qq |
| 2940 | zmin=xx/zmax |
| 2941 | qmax=qq |
| 2942 | fz1=0.d0 |
| 2943 | fz2=0.d0 |
| 2944 | |
| 2945 | if(zmin.lt.zmax)then |
| 2946 | if(zmin.lt..1d0)then |
| 2947 | zmax1=min(.1d0,zmax) |
| 2948 | do i=1,7 |
| 2949 | do m=1,2 |
| 2950 | if(n.eq.2)then |
| 2951 | z=xx+(zmin-xx)*((zmax1-xx)/(zmin-xx))**(.5+(m-1.5)*x1(i)) |
| 2952 | elseif(j.eq.1)then |
| 2953 | z=zmin*(zmax1/zmin)**(.5+(m-1.5)*x1(i)) |
| 2954 | else |
| 2955 | z=(.5d0*(zmax1+zmin+(zmax1-zmin)*(2*m-3)*x1(i))) |
| 2956 | endif |
| 2957 | qmin=max(q2ini/(1.d0-xx/z),q2ini/(1.d0-z)) |
| 2958 | qmin=max(qmin,q1) |
| 2959 | |
| 2960 | do k=1,2 |
| 2961 | fq=0.d0 |
| 2962 | do i1=1,7 |
| 2963 | do m1=1,2 |
| 2964 | if(n.eq.2)then |
| 2965 | qi=qmin*(qmax/qmin)**(.5+x1(i1)*(m1-1.5)) |
| 2966 | else |
| 2967 | qi=(.5*(qmax+qmin+(qmax-qmin)*(2.*m1-3.)*x1(i1))) |
| 2968 | endif |
| 2969 | |
| 2970 | if(j.eq.3.and.k.eq.1)then |
| 2971 | fk=0.d0 |
| 2972 | else |
| 2973 | if(n.eq.2)then |
| 2974 | fk=dble(psevi0(q1,qi,xx/z,min(2,j),k)) |
| 2975 | else |
| 2976 | fk=dble(psevi(q1,qi,xx/z,j,k)/qi) |
| 2977 | endif |
| 2978 | endif |
| 2979 | qt=qi*(1.d0-z) |
| 2980 | fq=fq+a1(i1)*fk/psuds(qi,l-1)*pssalf(qt/qcdlam) |
| 2981 | enddo |
| 2982 | enddo |
| 2983 | if(n.eq.2)then |
| 2984 | fq=fq*log(qmax/qmin)*(1.d0-xx/z) |
| 2985 | elseif(j.eq.1)then |
| 2986 | fq=fq*(qmax-qmin) |
| 2987 | else |
| 2988 | fq=fq*(qmax-qmin)/z |
| 2989 | endif |
| 2990 | fz1=fz1+a1(i)*fq*psfap(z,k-1,l-1) |
| 2991 | enddo |
| 2992 | enddo |
| 2993 | enddo |
| 2994 | if(n.eq.2)then |
| 2995 | fz1=fz1*log((zmax1-xx)/(zmin-xx))/4. |
| 2996 | elseif(j.eq.1)then |
| 2997 | fz1=fz1*log(zmax1/zmin)/4. |
| 2998 | else |
| 2999 | fz1=fz1*(zmax1-zmin)/4. |
| 3000 | endif |
| 3001 | endif |
| 3002 | |
| 3003 | if(zmax.gt..1d0)then |
| 3004 | zmin1=max(.1d0,zmin) |
| 3005 | do i=1,7 |
| 3006 | do m=1,2 |
| 3007 | z=1.d0-(1.d0-zmax)*((1.d0-zmin1)/(1.d0-zmax))** |
| 3008 | * (.5+x1(i)*(m-1.5)) |
| 3009 | qmin=max(q2ini/(1.d0-z),q2ini/(1.d0-xx/z)) |
| 3010 | qmin=max(qmin,q1) |
| 3011 | |
| 3012 | do k=1,2 |
| 3013 | fq=0. |
| 3014 | do i1=1,7 |
| 3015 | do m1=1,2 |
| 3016 | if(n.eq.2)then |
| 3017 | qi=qmin*(qmax/qmin)**(.5+x1(i1)*(m1-1.5)) |
| 3018 | else |
| 3019 | qi=(.5*(qmax+qmin+(qmax-qmin)*(2.*m1-3.)*x1(i1))) |
| 3020 | endif |
| 3021 | |
| 3022 | if(j.eq.3.and.k.eq.1)then |
| 3023 | fk=0.d0 |
| 3024 | else |
| 3025 | if(n.eq.2)then |
| 3026 | fk=dble(psevi0(q1,qi,xx/z,min(2,j),k)) |
| 3027 | else |
| 3028 | fk=dble(psevi(q1,qi,xx/z,j,k)/qi) |
| 3029 | endif |
| 3030 | endif |
| 3031 | qt=qi*(1.d0-z) |
| 3032 | fq=fq+a1(i1)*fk/psuds(qi,l-1)*pssalf(qt/qcdlam) |
| 3033 | enddo |
| 3034 | enddo |
| 3035 | if(n.eq.2)then |
| 3036 | fq=fq*log(qmax/qmin) |
| 3037 | else |
| 3038 | fq=fq*(qmax-qmin) |
| 3039 | endif |
| 3040 | fz2=fz2+a1(i)*fq*psfap(z,k-1,l-1)*(1.d0/z-1.d0) |
| 3041 | enddo |
| 3042 | enddo |
| 3043 | enddo |
| 3044 | fz2=fz2*log((1.d0-zmin1)/(1.d0-zmax))/4. |
| 3045 | endif |
| 3046 | endif |
| 3047 | psev=sngl((fz1+fz2)*psuds(qq,l-1)) |
| 3048 | return |
| 3049 | end |
| 3050 | |
| 3051 | c------------------------------------------------------------------------ |
| 3052 | function psevi0(q1,qq,xx,m,l) |
| 3053 | c------------------------------------------------------------------------ |
| 3054 | double precision xx,xmax,psuds |
| 3055 | dimension wi(3),wj(3),wk(3) |
| 3056 | common /psar2/ edmax,epmax |
| 3057 | common /psar31/ evk0(21,21,54) |
| 3058 | include 'epos.inc' |
| 3059 | include 'epos.incsem' |
| 3060 | |
| 3061 | xmax=1.d0-2.d0*q2ini/epmax |
| 3062 | qmin=max(1.d0*q2min,q2ini/(1.d0-xx)) |
| 3063 | qm1=max(q1,qmin) |
| 3064 | if(qq.gt..5001*epmax.and.ish.ge.1)then |
| 3065 | write(ifch,*)'0-extrap.:q1,qq,epmax,xx,m,l:',q1,qq,epmax,xx,m,l |
| 3066 | c stop |
| 3067 | endif |
| 3068 | if(xx.ge.xmax.or.qq.le.1.000*qm1)then |
| 3069 | psevi0=0. |
| 3070 | c write (*,*)'xx,xmax,qq,qm1,qmin,q1',xx,xmax,qq,qm1,qmin,q1 |
| 3071 | return |
| 3072 | endif |
| 3073 | |
| 3074 | if(m.eq.l)then |
| 3075 | psevi0=1. |
| 3076 | else |
| 3077 | if(xx.lt..1d0)then |
| 3078 | yx=log(10.d0*xx)+13. |
| 3079 | k=int(yx) |
| 3080 | if(k.gt.11)k=11 |
| 3081 | if(k.lt.1)k=1 |
| 3082 | elseif(xx.lt..9d0)then |
| 3083 | yx=10.*xx+12. |
| 3084 | k=int(yx) |
| 3085 | if(k.gt.19)k=19 |
| 3086 | else |
| 3087 | yx=log(10.d0*(1.d0-xx))/log(10.d0*(1.d0-xmax))*6.+21 |
| 3088 | k=int(yx) |
| 3089 | if(k.gt.25)k=25 |
| 3090 | endif |
| 3091 | wk(2)=yx-k |
| 3092 | wk(3)=wk(2)*(wk(2)-1.)*.5 |
| 3093 | wk(1)=1.-wk(2)+wk(3) |
| 3094 | wk(2)=wk(2)-2.*wk(3) |
| 3095 | |
| 3096 | qli=log(qq/qmin)/log(.5*epmax/qmin)*20.+1. |
| 3097 | qlj=log(qm1/qmin)/log(qq/qmin)*20.+1. |
| 3098 | i=int(qli) |
| 3099 | if(i.gt.19)i=19 |
| 3100 | if(i.lt.1)i=1 |
| 3101 | wi(2)=qli-i |
| 3102 | wi(3)=wi(2)*(wi(2)-1.)*.5 |
| 3103 | wi(1)=1.-wi(2)+wi(3) |
| 3104 | wi(2)=wi(2)-2.*wi(3) |
| 3105 | |
| 3106 | j=int(qlj) |
| 3107 | if(j.lt.1)j=1 |
| 3108 | if(j.gt.19)j=19 |
| 3109 | wj(2)=qlj-j |
| 3110 | wj(3)=wj(2)*(wj(2)-1.)*.5 |
| 3111 | wj(1)=1.-wj(2)+wj(3) |
| 3112 | wj(2)=wj(2)-2.*wj(3) |
| 3113 | |
| 3114 | psevi0=0. |
| 3115 | do i1=1,3 |
| 3116 | do j1=1,3 |
| 3117 | do k1=1,3 |
| 3118 | psevi0=psevi0+evk0(i+i1-1,j+j1-1,k+k1-1+27*(m-1)) |
| 3119 | * *wi(i1)*wj(j1)*wk(k1) |
| 3120 | enddo |
| 3121 | enddo |
| 3122 | enddo |
| 3123 | psevi0=exp(psevi0) |
| 3124 | endif |
| 3125 | psevi0=psevi0*psfap(xx,m-1,l-1)*log(log(qq*(1.d0-xx)/qcdlam) |
| 3126 | */log(qm1*(1.d0-xx)/qcdlam))*sngl(psuds(qq,m-1)/psuds(q1,m-1))/4.5 |
| 3127 | return |
| 3128 | end |
| 3129 | |
| 3130 | c------------------------------------------------------------------------ |
| 3131 | function psevi(q1,qq,xx,m,l) |
| 3132 | c------------------------------------------------------------------------ |
| 3133 | c m l: 1 1 ... gluon -> gluon |
| 3134 | c 2 1 ... quark -> gluon |
| 3135 | c 1 2 ... gluon -> quark |
| 3136 | c 3 2 ... quark -> quark non singlet |
| 3137 | c 2 2 ... quark -> quark all |
| 3138 | c singlet = all - non singlet |
| 3139 | c----------------------------------------------------------------------- |
| 3140 | double precision xx,xmax,psuds |
| 3141 | dimension wi(3),wj(3),wk(3) |
| 3142 | common /psar2/ edmax,epmax |
| 3143 | common /psar32/ evk(21,21,135) |
| 3144 | include 'epos.inc' |
| 3145 | include 'epos.incsem' |
| 3146 | |
| 3147 | psevi=0. |
| 3148 | xmax=1.d0-2.d0*q2ini/epmax |
| 3149 | if(qq.gt..5001*epmax.and.ish.ge.1)then |
| 3150 | write(ifch,*)'1-extrap.:q1,qq,epmax,xx,m,l:',q1,qq,epmax,xx,m,l |
| 3151 | c stop |
| 3152 | endif |
| 3153 | qmin=max(1.d0*q2min,q2ini/(1.d0-xx)) |
| 3154 | qm1=max(q1,qmin) |
| 3155 | if(xx.ge.xmax.or.qq.le.1.0001*qm1)then |
| 3156 | return |
| 3157 | endif |
| 3158 | qmin1=max(1.d0*qmin,q2ini/(1.d0-dsqrt(xx))) |
| 3159 | if(qq.le.1.0001*qmin1)then |
| 3160 | psevi=psevi0(q1,qq,xx,min(m,2),l) |
| 3161 | return |
| 3162 | endif |
| 3163 | |
| 3164 | if(xx.lt..1d0)then |
| 3165 | yx=log(10.d0*xx)+13. |
| 3166 | k=int(yx) |
| 3167 | if(k.gt.11)k=11 |
| 3168 | if(k.lt.1)k=1 |
| 3169 | elseif(xx.lt..9d0)then |
| 3170 | yx=10.*xx+12. |
| 3171 | k=int(yx) |
| 3172 | if(k.gt.19)k=19 |
| 3173 | else |
| 3174 | yx=log(10.d0*(1.d0-xx))/log(10.d0*(1.d0-xmax))*6.+21 |
| 3175 | k=int(yx) |
| 3176 | if(k.gt.25)k=25 |
| 3177 | endif |
| 3178 | wk(2)=yx-k |
| 3179 | wk(3)=wk(2)*(wk(2)-1.)*.5 |
| 3180 | wk(1)=1.-wk(2)+wk(3) |
| 3181 | wk(2)=wk(2)-2.*wk(3) |
| 3182 | |
| 3183 | qli=log(qq/qmin)/log(.5*epmax/qmin)*20.+1. |
| 3184 | qlj=log(qm1/qmin)/log(qq/qmin)*20.+1. |
| 3185 | i=int(qli) |
| 3186 | if(i.lt.1)i=1 |
| 3187 | if(i.gt.19)i=19 |
| 3188 | wi(2)=qli-i |
| 3189 | wi(3)=wi(2)*(wi(2)-1.)*.5 |
| 3190 | wi(1)=1.-wi(2)+wi(3) |
| 3191 | wi(2)=wi(2)-2.*wi(3) |
| 3192 | |
| 3193 | j=int(qlj) |
| 3194 | if(j.lt.1)j=1 |
| 3195 | if(j.gt.19)j=19 |
| 3196 | wj(2)=qlj-j |
| 3197 | wj(3)=wj(2)*(wj(2)-1.)*.5 |
| 3198 | wj(1)=1.-wj(2)+wj(3) |
| 3199 | wj(2)=wj(2)-2.*wj(3) |
| 3200 | |
| 3201 | do i1=1,3 |
| 3202 | do j1=1,3 |
| 3203 | do k1=1,3 |
| 3204 | if(m.eq.3)then |
| 3205 | k2=k+k1-1+108 |
| 3206 | else |
| 3207 | k2=k+k1-1+27*(m-1)+54*(l-1) |
| 3208 | endif |
| 3209 | psevi=psevi+evk(i+i1-1,j+j1-1,k2) |
| 3210 | * *wi(i1)*wj(j1)*wk(k1) |
| 3211 | enddo |
| 3212 | enddo |
| 3213 | enddo |
| 3214 | psevi=exp(psevi)*psfap(xx,m-1,l-1)*log(log(qq*(1.d0-xx)/qcdlam) |
| 3215 | */log(qm1*(1.d0-xx)/qcdlam))/4.5 |
| 3216 | if(q1.lt.qm1)psevi=psevi*sngl(psuds(qm1,m-1)/psuds(q1,m-1)) |
| 3217 | return |
| 3218 | end |
| 3219 | |
| 3220 | c------------------------------------------------------------------------ |
| 3221 | function psjci(q1,s,l1) |
| 3222 | c----------------------------------------------------------------------- |
| 3223 | c psjci - inclusive ordered ladder cross-section interpolation for c-quark |
| 3224 | c q1 - virtuality cutoff at current end of the ladder |
| 3225 | c s - total c.m. energy squared for the ladder, |
| 3226 | c l1 - parton type at current end of the ladder (0-g, 1,2,etc.-q) |
| 3227 | c----------------------------------------------------------------------- |
| 3228 | dimension wi(3),wk(3) |
| 3229 | common /psar2/ edmax,epmax |
| 3230 | common /psar23/ cschar(20,20,2) |
| 3231 | include 'epos.incsem' |
| 3232 | |
| 3233 | psjci=0. |
| 3234 | q2mass=qcmass**2 |
| 3235 | spmin=4.*q2min+q2mass |
| 3236 | qq=q1 |
| 3237 | s2min=4.*qq+q2mass |
| 3238 | if(s.le.s2min)return |
| 3239 | |
| 3240 | smins=s2min/(1.-q2ini/q1) |
| 3241 | c if(s.le.smins)goto 1 |
| 3242 | if(s.le.smins.or.qq.le.q2min)goto 1 !??????? ctp070618 |
| 3243 | |
| 3244 | p1=s/(1.+q2mass/s) |
| 3245 | if(p1.gt.4.*qq)then |
| 3246 | tmin=2.*qq/(1.+sqrt(1.-4.*qq/p1)) |
| 3247 | else |
| 3248 | tmin=2.*qq |
| 3249 | endif |
| 3250 | tmax=p1/2. |
| 3251 | qmax=p1/4. |
| 3252 | |
| 3253 | l=min(1,iabs(l1))+1 |
| 3254 | qli=log(qq/q2min)/log(qmax/q2min)*19.+1. |
| 3255 | sl=log(s/spmin)/log(epmax/2./spmin)*19.+1. |
| 3256 | k=int(sl) |
| 3257 | i=int(qli) |
| 3258 | if(i.lt.1)i=1 |
| 3259 | if(k.gt.18)k=18 |
| 3260 | if(i.gt.18)i=18 |
| 3261 | |
| 3262 | wi(2)=qli-i |
| 3263 | wi(3)=wi(2)*(wi(2)-1.)*.5 |
| 3264 | wi(1)=1.-wi(2)+wi(3) |
| 3265 | wi(2)=wi(2)-2.*wi(3) |
| 3266 | |
| 3267 | wk(2)=sl-k |
| 3268 | wk(3)=wk(2)*(wk(2)-1.)*.5 |
| 3269 | wk(1)=1.-wk(2)+wk(3) |
| 3270 | wk(2)=wk(2)-2.*wk(3) |
| 3271 | |
| 3272 | do i1=1,3 |
| 3273 | do k1=1,3 |
| 3274 | psjci=psjci+cschar(i+i1-1,k+k1-1,l)*wi(i1)*wk(k1) |
| 3275 | enddo |
| 3276 | enddo |
| 3277 | psjci=exp(psjci)*(1./tmin-1./tmax) |
| 3278 | return |
| 3279 | 1 psjci=psbint(q2min,q1,0.,s,4,l1,0) |
| 3280 | return |
| 3281 | end |
| 3282 | |
| 3283 | c----------------------------------------------------------------------- |
| 3284 | function psjct(s,l) |
| 3285 | c----------------------------------------------------------------------- |
| 3286 | c psjct - unordered ladder cross-section for c-quark |
| 3287 | c s - c.m. energy squared for the scattering; |
| 3288 | c l - parton type at opposite end of the ladder (0 - g, 1,2 etc. - q). |
| 3289 | c----------------------------------------------------------------------- |
| 3290 | double precision xx,zmax,qmax,qmin,qi,zmin,fsj,z,s2,sj |
| 3291 | common /ar3/ x1(7),a1(7) |
| 3292 | include 'epos.inc' |
| 3293 | include 'epos.incsem' |
| 3294 | |
| 3295 | psjct=0. |
| 3296 | q2mass=qcmass**2 |
| 3297 | zmax=dble(s)/(dble(s)+dble(5.*q2mass)) |
| 3298 | qmax=zmax**2*dble(q2mass)/(1.d0-zmax) |
| 3299 | qmin=dble(q2min) |
| 3300 | |
| 3301 | if(qmax.lt.qmin.and.ish.ge.1)write(ifch,*)'psjct:qmin,qmax' |
| 3302 | * ,qmin,qmax |
| 3303 | do i=1,7 |
| 3304 | do m=1,2 |
| 3305 | qi=2.d0*qmin/(1.d0+qmin/qmax+dble((2*m-3)*x1(i)) |
| 3306 | * *(1.d0-qmin/qmax)) |
| 3307 | zmax=(2.d0/(1.d0+dsqrt(1.d0+4.d0*dble(q2mass)/qi)))**delh |
| 3308 | zmin=(5.d0*qi/dble(s))**delh |
| 3309 | |
| 3310 | fsj=0.d0 |
| 3311 | if(zmax.lt.zmin.and.ish.ge.1)write(ifch,*)'psjct:zmin,zmax' |
| 3312 | * ,zmin,zmax |
| 3313 | do i1=1,7 |
| 3314 | do m1=1,2 |
| 3315 | z=(.5d0*(zmax+zmin+dble((2*m1-3)*x1(i1)) |
| 3316 | * *(zmax-zmin)))**(1./delh) |
| 3317 | s2=z*dble(s)-qi |
| 3318 | xx=z |
| 3319 | sj=dble(psjti(sngl(qi),q2min,sngl(s2),0,l,0)*psfap(xx,1,0))*z |
| 3320 | fsj=fsj+dble(a1(i1))*sj*dble(pssalf(sngl(qi)/qcdlam))/z**delh |
| 3321 | enddo |
| 3322 | enddo |
| 3323 | fsj=fsj*(zmax-zmin) |
| 3324 | psjct=psjct+a1(i)*sngl(fsj*qi) |
| 3325 | enddo |
| 3326 | enddo |
| 3327 | psjct=psjct*sngl(1./qmin-1./qmax)/delh/4. |
| 3328 | return |
| 3329 | end |
| 3330 | |
| 3331 | c------------------------------------------------------------------------ |
| 3332 | function psjet1(q1,q2,qqcut,s,j,l,jdis) |
| 3333 | c----------------------------------------------------------------------- |
| 3334 | c psjet1 - ordered parton ladder cross-section |
| 3335 | c q1 - virtuality cutoff at current end of the ladder; |
| 3336 | c q2 - virtuality cutoff at opposite end of the ladder; |
| 3337 | c qqcut - p_t cutoff for the born process; |
| 3338 | c s - c.m. energy squared for the scattering; |
| 3339 | c j - parton type at current end of the ladder (0 - g, 1,2 etc. - q); |
| 3340 | c l - parton type at opposite end of the ladder (0 - g, 1,2 etc. - q). |
| 3341 | c----------------------------------------------------------------------- |
| 3342 | double precision xx,z,qq,xmax,xmin,s2min,smin,p1,q2ms,q2inis,xmin1 |
| 3343 | *,sh,qtmin,t,xmax1,fx1,fx2,psuds |
| 3344 | common /ar3/ x1(7),a1(7) |
| 3345 | common /ar9/ x9(3),a9(3) |
| 3346 | include 'epos.inc' |
| 3347 | include 'epos.incsem' |
| 3348 | |
| 3349 | psjet1=0. |
| 3350 | if(jdis.eq.0)then |
| 3351 | qq=dble(max(q1,q2)) |
| 3352 | elseif(jdis.eq.1)then |
| 3353 | qq=dble(max(q1/4.,q2)) |
| 3354 | else |
| 3355 | qq=dble(max(q1,q2/4.)) |
| 3356 | endif |
| 3357 | qq=max(qq,dble(qqcut)) |
| 3358 | if(l.ne.3)then |
| 3359 | q2mass=0. |
| 3360 | else |
| 3361 | q2mass=qcmass**2 |
| 3362 | endif |
| 3363 | s2min=dble(q2mass)+4.d0*qq |
| 3364 | if(jdis.eq.0.or.jdis.eq.2)then |
| 3365 | smin=s2min/(1.d0-dble(q2ini)/qq) |
| 3366 | else |
| 3367 | smin=s2min/(1.d0-dble(q2ini)/qq/4.d0) |
| 3368 | endif |
| 3369 | if(dble(s).le.smin)return |
| 3370 | |
| 3371 | q2ms=dble(q2mass)/dble(s) |
| 3372 | q2inis=dble(q2ini)/dble(s) |
| 3373 | p1=dble(s)/(1.d0+q2ms) |
| 3374 | |
| 3375 | |
| 3376 | if(jdis.eq.0.or.jdis.eq.2)then |
| 3377 | xmax=.5d0*(1.d0+q2ms)+dsqrt(.25d0*(1.d0-q2ms)**2-4.d0*q2inis) |
| 3378 | else |
| 3379 | xmax=.5d0*(1.+q2ms)+dsqrt(.25d0*(1.-q2ms)**2-q2inis) |
| 3380 | endif |
| 3381 | xmin=max(1.d0+q2ms-xmax,s2min/dble(s)) |
| 3382 | if(xmin.ge.xmax.and.ish.ge.1)then |
| 3383 | write(ifch,*)'jti1,xmin,xmax',xmin,xmax |
| 3384 | c return |
| 3385 | endif |
| 3386 | |
| 3387 | fx1=0.d0 |
| 3388 | fx2=0.d0 |
| 3389 | if(xmax.gt..8d0)then |
| 3390 | xmin1=max(xmin,.8d0) |
| 3391 | do i=1,3 |
| 3392 | do m=1,2 |
| 3393 | z=1.d0-(1.d0-xmax)*((1.d0-xmin1)/(1.d0-xmax))** |
| 3394 | * (.5d0+dble(x9(i)*(m-1.5))) |
| 3395 | sh=z*dble(s) |
| 3396 | xx=z |
| 3397 | p1=sh/(1.d0+dble(q2mass)/sh) |
| 3398 | |
| 3399 | if(jdis.eq.0.or.jdis.eq.2)then |
| 3400 | qtmin=max(qq,dble(q2ini)/(1.d0-z)) |
| 3401 | else |
| 3402 | qtmin=max(qq,dble(q2ini)/(1.d0-z)/4.d0) |
| 3403 | endif |
| 3404 | tmin=2.d0*dble(qtmin)/(1.d0+dsqrt(1.d0-4.d0*dble(qtmin)/p1)) |
| 3405 | tmax=p1/2.d0 |
| 3406 | |
| 3407 | ft=0. |
| 3408 | if(tmin.ge.tmax.and.ish.ge.1)write(ifch,*)'psjet1:tmin,tmax' |
| 3409 | * ,tmin,tmax |
| 3410 | do i1=1,3 |
| 3411 | do m1=1,2 |
| 3412 | t=2.d0*tmin/(1.d0+tmin/tmax-dble(x9(i1)*(2*m1-3)) |
| 3413 | & *(1.d0-tmin/tmax)) |
| 3414 | qt=sngl(t*(1.d0-t/p1)) |
| 3415 | c if(qt.lt.qtmin)write (*,*)'psjet1:qt,qq',qt,qq |
| 3416 | |
| 3417 | if(jdis.eq.0)then |
| 3418 | scale1=qt |
| 3419 | scale2=qt |
| 3420 | elseif(jdis.eq.1)then |
| 3421 | scale1=qt*4. |
| 3422 | scale2=qt |
| 3423 | elseif(jdis.eq.2)then |
| 3424 | scale1=qt |
| 3425 | scale2=qt*4. |
| 3426 | endif |
| 3427 | fb=0. |
| 3428 | do n=1,3 |
| 3429 | fb=fb+psjetj(q1,scale1,sngl(t),xx,sngl(sh),j,l,n) |
| 3430 | enddo |
| 3431 | ft=ft+a9(i1)*fb*pssalf(qt/qcdlam)**2*sngl(t**2 |
| 3432 | * *psuds(scale2,l)) |
| 3433 | enddo |
| 3434 | enddo |
| 3435 | fx1=fx1+dble(a9(i)*ft)*(1.d0/tmin-1.d0/tmax)/sh**2*(1.d0-z) |
| 3436 | enddo |
| 3437 | enddo |
| 3438 | fx1=fx1*dlog((1.d0-xmin1)/(1.d0-xmax)) |
| 3439 | endif |
| 3440 | |
| 3441 | if(xmin.lt..8d0)then |
| 3442 | xmax1=min(xmax,.8d0)**(-delh) |
| 3443 | xmin1=xmin**(-delh) |
| 3444 | do i=1,3 |
| 3445 | do m=1,2 |
| 3446 | z=(.5d0*(xmax1+xmin1+(xmin1-xmax1)*dble((2*m-3)*x9(i)))) |
| 3447 | * **(-1./delh) |
| 3448 | sh=z*dble(s) |
| 3449 | xx=z |
| 3450 | p1=sh/(1.d0+dble(q2mass)/sh) |
| 3451 | |
| 3452 | if(jdis.eq.0.or.jdis.eq.2)then |
| 3453 | qtmin=max(qq,dble(q2ini)/(1.d0-z)) |
| 3454 | else |
| 3455 | qtmin=max(qq,dble(q2ini)/(1.d0-z)/4.d0) |
| 3456 | endif |
| 3457 | tmin=2.d0*dble(qtmin)/(1.d0+dsqrt(1.d0-4.d0*dble(qtmin)/p1)) |
| 3458 | tmax=p1/2.d0 |
| 3459 | |
| 3460 | ft=0. |
| 3461 | if(tmin.ge.tmax.and.ish.ge.1)write(ifch,*)'psjet1:tmin,tmax' |
| 3462 | & ,tmin,tmax |
| 3463 | do i1=1,3 |
| 3464 | do m1=1,2 |
| 3465 | t=2.d0*tmin/(1.d0+tmin/tmax-dble(x9(i1)*(2*m1-3)) |
| 3466 | & *(1.d0-tmin/tmax)) |
| 3467 | qt=sngl(t*(1.d0-t/p1)) |
| 3468 | if(qt.lt.sngl(qtmin).and.ish.ge.1)write(ifch,*)'psjet1:qt,qq' |
| 3469 | & ,qt,qq |
| 3470 | |
| 3471 | if(jdis.eq.0)then |
| 3472 | scale1=qt |
| 3473 | scale2=qt |
| 3474 | elseif(jdis.eq.1)then |
| 3475 | scale1=qt*4. |
| 3476 | scale2=qt |
| 3477 | elseif(jdis.eq.2)then |
| 3478 | scale1=qt |
| 3479 | scale2=qt*4. |
| 3480 | endif |
| 3481 | fb=0. |
| 3482 | do n=1,3 |
| 3483 | fb=fb+psjetj(q1,scale1,sngl(t),xx,sngl(sh),j,l,n) |
| 3484 | enddo |
| 3485 | ft=ft+a9(i1)*fb*pssalf(qt/qcdlam)**2*sngl(t**2 |
| 3486 | * *psuds(scale2,l)) |
| 3487 | enddo |
| 3488 | enddo |
| 3489 | fx2=fx2+dble(a9(i)*ft)*(1.d0/tmin-1.d0/tmax)/sh**2*z**(1.+delh) |
| 3490 | enddo |
| 3491 | enddo |
| 3492 | fx2=fx2*(xmin1-xmax1)/dble(delh) |
| 3493 | endif |
| 3494 | psjet1=sngl((fx1+fx2)/psuds(q2,l))*pi**3*2 |
| 3495 | * /2 !CS for parton pair |
| 3496 | return |
| 3497 | end |
| 3498 | |
| 3499 | c----------------------------------------------------------------------- |
| 3500 | function psjet(q1,q2,qqcut,s,j,l,jdis) |
| 3501 | c----------------------------------------------------------------------- |
| 3502 | c parton ladder cross-section |
| 3503 | c with at least one emission on each side |
| 3504 | c |
| 3505 | c q1 - virtuality cutoff at current end of the ladder; |
| 3506 | c q2 - virtuality cutoff at opposite end of the ladder; |
| 3507 | c qqcut - p_t cutoff for the born process; |
| 3508 | c s - c.m. energy squared for the scattering; |
| 3509 | c j - parton type at current end of the ladder (0 - g, 1,2 etc. - q); |
| 3510 | c l - parton type at opposite end of the ladder (0 - g, 1,2 etc. - q). |
| 3511 | c----------------------------------------------------------------------- |
| 3512 | double precision xx1,xx2,qq,s2min,xmin,xmax,xmin1,xmax1,t,tmin |
| 3513 | *,tmax,sh,z,qtmin,ft,fx1,fx2 |
| 3514 | common /ar3/ x1(7),a1(7) |
| 3515 | common /ar9/ x9(3),a9(3) |
| 3516 | include 'epos.inc' |
| 3517 | include 'epos.incsem' |
| 3518 | common/ccctest/iiitest |
| 3519 | iiitest=0 |
| 3520 | |
| 3521 | psjet=0. |
| 3522 | if(jdis.eq.0)then |
| 3523 | qq=dble(max(q1,q2)) |
| 3524 | else |
| 3525 | qq=dble(max(q1/4.,q2)) |
| 3526 | endif |
| 3527 | qq=max(qq,dble(qqcut)) |
| 3528 | s2min=4.d0*qq |
| 3529 | if(dble(s).le.s2min/(1.d0-dble(q2ini)/qq)**2)return !kkkkkkk |
| 3530 | |
| 3531 | phi=acos(1.-54.*q2ini/s)/3. |
| 3532 | zmax=(1.+2.*cos(phi))**2/9. !kkkkkkk |
| 3533 | zmin=(1.-cos(phi)+sqrt(3.d0)*sin(phi))/3. !kkkkkkk |
| 3534 | zmin=max(zmin**2,sngl(s2min/dble(s))) |
| 3535 | if(zmin.gt.zmax.and.ish.ge.1)write(ifch,*)'psjet:zmin,zmax' |
| 3536 | * ,zmin,zmax |
| 3537 | zmin=zmin**(-delh) |
| 3538 | zmax=zmax**(-delh) |
| 3539 | do i=1,3 |
| 3540 | do m=1,2 |
| 3541 | z=dble(.5*(zmax+zmin+(zmin-zmax)*(2*m-3)*x9(i)))**(-1./delh) |
| 3542 | xmin=dsqrt(z) |
| 3543 | sh=z*dble(s) |
| 3544 | |
| 3545 | qtmin=max(qq,dble(q2ini)/(1.d0-dsqrt(z))) |
| 3546 | tmin=max(0.d0,1.d0-4.d0*qtmin/sh) |
| 3547 | tmin=2.d0*qtmin/(1.d0+dsqrt(tmin)) !kkkkkkk |
| 3548 | tmax=sh/2.d0 |
| 3549 | |
| 3550 | ft=0.d0 |
| 3551 | c if(tmin.gt.tmax)write (*,*)'psjet:tmin,tmax',tmin,tmax |
| 3552 | do i1=1,3 |
| 3553 | do m1=1,2 |
| 3554 | t=2.d0*tmin/(1.d0+tmin/tmax-dble(x9(i1)*(2*m1-3)) |
| 3555 | & *(1.d0-tmin/tmax)) |
| 3556 | qt=t*(1.d0-t/sh) |
| 3557 | c if(qt.lt.qtmin)write (*,*)'psjet:qt,qq',qt,qq |
| 3558 | xmax=1.d0-q2ini/qt |
| 3559 | xmin=max(dsqrt(z),z/xmax) !xm>xp !!! |
| 3560 | if(xmin.gt.xmax.and.ish.ge.1)write(ifch,*)'psjet:xmin,xmax' |
| 3561 | * ,xmin,xmax |
| 3562 | fx1=0.d0 |
| 3563 | fx2=0.d0 |
| 3564 | if(xmax.gt..8d0)then |
| 3565 | xmin1=max(xmin,.8d0) |
| 3566 | do i2=1,3 |
| 3567 | do m2=1,2 |
| 3568 | xx1=1.d0-(1.d0-xmax)*((1.d0-xmin1)/(1.d0-xmax))** |
| 3569 | * dble(.5+x9(i2)*(m2-1.5)) |
| 3570 | xx2=z/xx1 |
| 3571 | |
| 3572 | fb=0. |
| 3573 | fb=fb+psjeti(q1,q2,qt,sngl(t),xx1,xx2,sngl(sh) |
| 3574 | * ,j,l,jdis) |
| 3575 | * +psjeti(q1,q2,qt,sngl(t),xx2,xx1,sngl(sh) |
| 3576 | * ,j,l,jdis) |
| 3577 | fx1=fx1+dble(a9(i2)*fb)*(1.d0/xx1-1.d0) |
| 3578 | * *pssalf(qt/qcdlam)**2 |
| 3579 | enddo |
| 3580 | enddo |
| 3581 | fx1=fx1*dlog((1.d0-xmin1)/(1.d0-xmax)) |
| 3582 | endif |
| 3583 | if(xmin.lt..8d0)then |
| 3584 | xmax1=min(xmax,.8d0) |
| 3585 | do i2=1,3 |
| 3586 | do m2=1,2 |
| 3587 | xx1=xmin*(xmax1/xmin)**dble(.5+x9(i2)*(m2-1.5)) |
| 3588 | xx2=z/xx1 |
| 3589 | |
| 3590 | fb=0. |
| 3591 | fb=fb+psjeti(q1,q2,qt,sngl(t),xx1,xx2,sngl(sh) |
| 3592 | * ,j,l,jdis) |
| 3593 | * +psjeti(q1,q2,qt,sngl(t),xx2,xx1,sngl(sh) |
| 3594 | * ,j,l,jdis) |
| 3595 | fx2=fx2+dble(a9(i2))*fb*pssalf(qt/qcdlam)**2 |
| 3596 | enddo |
| 3597 | enddo |
| 3598 | fx2=fx2*dlog(xmax1/xmin) |
| 3599 | endif |
| 3600 | ft=ft+dble(a9(i1))*(fx1+fx2)*t**2 |
| 3601 | enddo |
| 3602 | enddo |
| 3603 | ft=ft*(1.d0/tmin-1.d0/tmax) |
| 3604 | psjet=psjet+a9(i)*sngl(ft*z**(1.+delh)/sh**2) |
| 3605 | enddo |
| 3606 | enddo |
| 3607 | psjet=psjet*(zmin-zmax)/delh*pi**3 |
| 3608 | * /2. !CS for parton pair |
| 3609 | return |
| 3610 | end |
| 3611 | |
| 3612 | c----------------------------------------------------------------------- |
| 3613 | function pijet(ii,qi,qq,sk,m1,l1) !polynomial interpol of jet CS |
| 3614 | c----------------------------------------------------------------------- |
| 3615 | c ii ..... type of CS (2 = bothside, 1 = oneside, 0 = no emission, Born) |
| 3616 | c qi ..... virtuality cutoff at current end of the ladder |
| 3617 | c qq ..... virtuality cutoff of Born |
| 3618 | c sk ..... energy squared for the scattering |
| 3619 | c m1,l1 .. parton types |
| 3620 | c----------------------------------------------------------------------- |
| 3621 | include 'epos.incsem' |
| 3622 | common/psar2/edmax,epmax |
| 3623 | common/tabcsjet/ksmax,iqmax,jqmax,csjet(0:2,2,20,20,20,3,2) |
| 3624 | real wi(3),wj(3),wk(3) |
| 3625 | common/cpijet/npijet |
| 3626 | data npijet/0/ |
| 3627 | npijet=npijet+1 |
| 3628 | if(npijet.eq.1)call MakeCSTable |
| 3629 | |
| 3630 | if(m1.ne.0.and.m1.eq.l1)then |
| 3631 | m=2 |
| 3632 | l=2 |
| 3633 | elseif(m1.ne.0.and.m1.eq.-l1)then |
| 3634 | m=3 |
| 3635 | l=1 |
| 3636 | elseif(m1.ne.0.and.l1.ne.0.and.m1.ne.l1)then |
| 3637 | m=3 |
| 3638 | l=2 |
| 3639 | else |
| 3640 | m=min(1,iabs(m1))+1 |
| 3641 | l=min(1,iabs(l1))+1 |
| 3642 | endif |
| 3643 | |
| 3644 | qqmin=min(qi,qq) |
| 3645 | qmax=sk/4. |
| 3646 | spmin=4.*q2min |
| 3647 | spmed=spmin*(epmax/2./spmin)**(1./(ksmax-1.)) |
| 3648 | if(sk.le.spmed)then |
| 3649 | kk=2 |
| 3650 | spmax=spmed |
| 3651 | else |
| 3652 | kk=1 |
| 3653 | spmax=epmax/2. |
| 3654 | endif |
| 3655 | |
| 3656 | qli=1.+log(qi/q2min)/log(qmax/q2min)*(iqmax-1) |
| 3657 | qlj=1.+log(qq/qqmin)/log(qmax/qqmin)*(jqmax-1) |
| 3658 | sl= 1.+log(sk/spmin)/log(spmax/spmin)*(ksmax-1) |
| 3659 | k=int(sl) |
| 3660 | i=int(qli) |
| 3661 | j=int(qlj) |
| 3662 | if(k.lt.1)k=1 |
| 3663 | if(j.lt.1)j=1 |
| 3664 | if(i.lt.1)i=1 |
| 3665 | if(k.gt.(ksmax-2))k=ksmax-2 |
| 3666 | if(i.gt.(iqmax-2))i=iqmax-2 |
| 3667 | if(j.gt.(jqmax-2))j=jqmax-2 |
| 3668 | |
| 3669 | wi(2)=qli-i |
| 3670 | wi(3)=wi(2)*(wi(2)-1.)*.5 |
| 3671 | wi(1)=1.-wi(2)+wi(3) |
| 3672 | wi(2)=wi(2)-2.*wi(3) |
| 3673 | |
| 3674 | wj(2)=qlj-j |
| 3675 | wj(3)=wj(2)*(wj(2)-1.)*.5 |
| 3676 | wj(1)=1.-wj(2)+wj(3) |
| 3677 | wj(2)=wj(2)-2.*wj(3) |
| 3678 | |
| 3679 | wk(2)=sl-k |
| 3680 | wk(3)=wk(2)*(wk(2)-1.)*.5 |
| 3681 | wk(1)=1.-wk(2)+wk(3) |
| 3682 | wk(2)=wk(2)-2.*wk(3) |
| 3683 | |
| 3684 | pijet=0 |
| 3685 | do i1=1,3 |
| 3686 | do j1=1,3 |
| 3687 | do k1=1,3 |
| 3688 | pijet=pijet+csjet(ii,kk,k+k1-1,i+i1-1,j+j1-1,m,l) |
| 3689 | * *wi(i1)*wj(j1)*wk(k1) |
| 3690 | enddo |
| 3691 | enddo |
| 3692 | enddo |
| 3693 | ! if(ii.eq.2)print*,' ' |
| 3694 | ! write(*,'(i2,f6.0,i2,3x,3(2f5.2,2x),f5.2)') |
| 3695 | !* ii,sk,k,(wk(kk1),csjet(ii,kk,k+kk1-1,1,1,m,l),kk1=1,3) ,pijet |
| 3696 | end |
| 3697 | |
| 3698 | c----------------------------------------------------------------------- |
| 3699 | subroutine MakeCSTable !tabulates psjet |
| 3700 | c----------------------------------------------------------------------- |
| 3701 | c last two indices of table: parton types |
| 3702 | c 1 1 ... gg |
| 3703 | c 1 2 ... gq |
| 3704 | c 2 1 ... qg |
| 3705 | c 2 2 ... qq |
| 3706 | c 3 1 ... qa |
| 3707 | c 3 2 ... qq' |
| 3708 | c----------------------------------------------------------------------- |
| 3709 | include 'epos.incsem' |
| 3710 | common/psar2/edmax,epmax |
| 3711 | common/tabcsjet/ksmax,iqmax,jqmax,csjet(0:2,2,20,20,20,3,2) |
| 3712 | write (*,'(a,$)')'(CS table' |
| 3713 | ksmax=10 |
| 3714 | iqmax=3 |
| 3715 | jqmax=3 |
| 3716 | spmin=4.*q2min |
| 3717 | do kk=1,2 |
| 3718 | if(kk.eq.1)spmax=epmax/2. |
| 3719 | if(kk.eq.2)spmax=spmin*(epmax/2./spmin)**(1./(ksmax-1.)) |
| 3720 | do m=1,3 !parton type at upper end of the ladder |
| 3721 | write (*,'(a,$)')'.' |
| 3722 | do l=1,2 !parton type at lower end of the ladder |
| 3723 | m1=m-1 |
| 3724 | l1=l-1 |
| 3725 | if(m.eq.3.and.l.eq.1)l1=-m1 |
| 3726 | do k=1,ksmax |
| 3727 | sk=spmin*(spmax/spmin)**((k-1.)/(ksmax-1.)) |
| 3728 | qmax=sk/4. |
| 3729 | do i=1,iqmax |
| 3730 | qi=q2min*(qmax/q2min)**((i-1.)/(iqmax-1.)) |
| 3731 | do j=1,jqmax |
| 3732 | qq=qi*(qmax/qi)**((j-1.)/(jqmax-1.)) |
| 3733 | !write(*,'(i3,4f8.3,2i4,$)')j, qi,q2min,qq,sk,m1,l1 |
| 3734 | csjet(2,kk,k,i,j,m,l)= psjet(qi,q2min,qq,sk,m1,l1,0) |
| 3735 | csjet(1,kk,k,i,j,m,l)=psjet1(qi,q2min,qq,sk,m1,l1,0) |
| 3736 | csjet(0,kk,k,i,j,m,l)=psborn(qi,q2min,qq,sk,m1,l1,0,1) |
| 3737 | ! if(i.eq.1.and.j.eq.1.and.m.eq.1.and.l.eq.1) |
| 3738 | ! *write(*,'(2f8.2,f13.2,2i3,3x,i3,3f8.3)') |
| 3739 | ! * qi,qq,sk,m1,l1,k,csjet(2,kk,k,i,j,m,l) |
| 3740 | ! * ,csjet(1,kk,k,i,j,m,l),csjet(0,kk,k,i,j,m,l) |
| 3741 | enddo |
| 3742 | enddo |
| 3743 | enddo |
| 3744 | enddo |
| 3745 | enddo |
| 3746 | enddo |
| 3747 | write (*,'(a,$)')'done)' |
| 3748 | end |
| 3749 | |
| 3750 | c----------------------------------------------------------------------- |
| 3751 | function psjeti(q1,q2,qt,t,xx1,xx2,s,j,l,jdis) |
| 3752 | c----------------------------------------------------------------------- |
| 3753 | c |
| 3754 | c E~qcd_ji * E~qcd_lk * B_ik |
| 3755 | c |
| 3756 | c B_ik = psbori = contribution to Born xsection: |
| 3757 | c dsigmaBorn/d2pt/dy |
| 3758 | c = s/pi * delta(s+t+u) * 2*pi*alpha**2 /s**2 * B_ik |
| 3759 | c |
| 3760 | c E~qcd: at least one emission |
| 3761 | c |
| 3762 | c q1 - virtuality cutoff at current end of the ladder |
| 3763 | c q2 - virtuality cutoff at opposite end of the ladder |
| 3764 | c xx1 - feinman x for the first parton for the born process |
| 3765 | c xx2 - feinman x for the second parton for the born process |
| 3766 | c s - c.m. energy squared for the born scattering |
| 3767 | c t - invariant variable for the scattering |(p1-p3)**2|, |
| 3768 | c j - parton type at current end of the ladder (0 - g, 1,-1,2,... - q) |
| 3769 | c l - parton type at opposite end of the ladder (0 - g, 1,-1,2,... - q) |
| 3770 | c----------------------------------------------------------------------- |
| 3771 | c reminder |
| 3772 | c psevi: 1 1 ... gluon -> gluon |
| 3773 | c 2 1 ... quark -> gluon |
| 3774 | c 1 2 ... gluon -> quark |
| 3775 | c 3 2 ... quark -> quark non singlet |
| 3776 | c 2 2 ... quark -> quark all |
| 3777 | c singlet = all - non singlet |
| 3778 | c----------------------------------------------------------------------- |
| 3779 | double precision xx1,xx2 |
| 3780 | include 'epos.incsem' |
| 3781 | common/ccctest/iiitest |
| 3782 | |
| 3783 | if(jdis.eq.0)then |
| 3784 | scale=qt |
| 3785 | else |
| 3786 | scale=qt*4. |
| 3787 | endif |
| 3788 | if(j.eq.0.and.l.eq.0)then ! gluon-gluon ---> |
| 3789 | akg1=psevi(q1,scale,xx1,1,1) !gluon contribution |
| 3790 | akg2=psevi(q2,qt,xx2,1,1) !gluon contribution |
| 3791 | aks1=psevi(q1,scale,xx1,1,2)/naflav/2. !singlet contribution per quark |
| 3792 | aks2=psevi(q2,qt,xx2,1,2)/naflav/2. !singlet contribution per quark |
| 3793 | psjeti=ffborn(s,t,akg1*akg2 |
| 3794 | * ,(akg1*aks2+aks1*akg2)*naflav*2. !ccccc |
| 3795 | * ,aks1*aks2*naflav*2. |
| 3796 | * ,aks1*aks2*naflav*2. |
| 3797 | * ,aks1*aks2*naflav*2.*(naflav-1)*2. |
| 3798 | *) |
| 3799 | elseif(j.eq.0)then ! gluon-quark ---> |
| 3800 | akg1=psevi(q1,scale,xx1,1,1) !gluon contribution |
| 3801 | akg2=psevi(q2,qt,xx2,2,1) !gluon contribution |
| 3802 | aks1=psevi(q1,scale,xx1,1,2)/naflav/2. !singlet contribution |
| 3803 | akns2=psevi(q2,qt,xx2,3,2) !nonsinglet contribution |
| 3804 | aks2=(psevi(q2,qt,xx2,2,2)-akns2)/naflav/2. !singlet contribution |
| 3805 | psjeti=ffborn(s,t,akg1*akg2 |
| 3806 | * ,(akg1*(akns2+aks2*naflav*2.)+aks1*akg2*naflav*2.) |
| 3807 | * ,aks1*(akns2+aks2*naflav*2.) |
| 3808 | * ,aks1*(akns2+aks2*naflav*2.) |
| 3809 | * ,aks1*(akns2+aks2*naflav*2.)*(naflav-1)*2.) |
| 3810 | elseif(l.eq.0)then ! quark-gluon ---> |
| 3811 | akg1=psevi(q1,scale,xx1,2,1) !gluon contribution |
| 3812 | akg2=psevi(q2,qt,xx2,1,1) !gluon contribution |
| 3813 | akns1=psevi(q1,scale,xx1,3,2) !nonsinglet contribution |
| 3814 | aks1=(psevi(q1,scale,xx1,2,2)-akns1)/naflav/2. !singlet contribution |
| 3815 | aks2=psevi(q2,qt,xx2,1,2)/naflav/2. !singlet contribution |
| 3816 | psjeti=ffborn(s,t,akg1*akg2 |
| 3817 | * ,(akg2*(akns1+aks1*naflav*2.)+aks2*akg1*naflav*2.) |
| 3818 | * ,aks2*(akns1+aks1*naflav*2.) |
| 3819 | * ,aks2*(akns1+aks1*naflav*2.) |
| 3820 | * ,aks2*(akns1+aks1*naflav*2.)*(naflav-1)*2.) |
| 3821 | else ! quark-quark ---> |
| 3822 | akg1=psevi(q1,scale,xx1,2,1) !gluon contribution |
| 3823 | akg2=psevi(q2,qt,xx2,2,1) !gluon contribution |
| 3824 | akns1=psevi(q1,scale,xx1,3,2) !nonsinglet contribution |
| 3825 | aks1=(psevi(q1,scale,xx1,2,2)-akns1)/naflav/2.!singlet contribution |
| 3826 | akns2=psevi(q2,qt,xx2,3,2) !nonsinglet contribution |
| 3827 | aks2=(psevi(q2,qt,xx2,2,2)-akns2)/naflav/2.!singlet contribution |
| 3828 | |
| 3829 | if(j.eq.l)then |
| 3830 | psjeti=ffborn(s,t,akg1*akg2 |
| 3831 | * ,(akg2*(akns1+aks1*naflav*2.)+akg1*(akns2+aks2*naflav*2.)) |
| 3832 | * ,((akns1+aks1)*(akns2+aks2)+aks1*aks2*(2.*naflav-1.)) |
| 3833 | * ,(akns1*aks2+akns2*aks1+aks1*aks2*naflav*2.) |
| 3834 | * ,(akns1*aks2+akns2*aks1+aks1*aks2*naflav*2.)*(naflav-1)*2.) |
| 3835 | elseif(j.eq.-l)then |
| 3836 | psjeti=ffborn(s,t,akg1*akg2 |
| 3837 | * ,(akg2*(akns1+aks1*naflav*2.)+akg1*(akns2+aks2*naflav*2.)) |
| 3838 | * ,(akns1*aks2+akns2*aks1+aks1*aks2*naflav*2.) |
| 3839 | * ,((akns1+aks1)*(akns2+aks2)+aks1*aks2*(2.*naflav-1.)) |
| 3840 | * ,(akns1*aks2+akns2*aks1+aks1*aks2*naflav*2.)*(naflav-1)*2.) |
| 3841 | else !j.ne.l,-l |
| 3842 | psjeti=ffborn(s,t,akg1*akg2 |
| 3843 | * ,(akg2*(akns1+aks1*naflav*2.)+akg1*(akns2+aks2*naflav*2.)) |
| 3844 | * ,(akns1*aks2+akns2*aks1+aks1*aks2*naflav*2.) |
| 3845 | * ,(akns1*aks2+akns2*aks1+aks1*aks2*naflav*2.) |
| 3846 | * ,(akns1*akns2+akns1*aks2*(naflav-1)*2. |
| 3847 | * +akns2*aks1*(naflav-1)*2.+aks1*aks2*naflav*2.*(naflav-1)*2.)) |
| 3848 | endif |
| 3849 | endif |
| 3850 | return |
| 3851 | end |
| 3852 | |
| 3853 | c----------------------------------------------------------------------- |
| 3854 | function psjetj(q1,scale,t,xx,s,j,l,n) |
| 3855 | c----------------------------------------------------------------------- |
| 3856 | c psjetj - integrand for the ordered ladder cross-section |
| 3857 | c q1 - virtuality cutoff at current end of the ladder, |
| 3858 | c scale - born process scale, |
| 3859 | c t - invariant variable for the scattering |(p1-p3)**2|, |
| 3860 | c xx - feinman x for the first parton for the born process |
| 3861 | c s - c.m. energy squared for the born scattering, |
| 3862 | c j - parton type at current end of the ladder (0 - g, 1,-1,2,... - q) |
| 3863 | c l - parton type at opposite end of the ladder (0 - g, 1,-1,2,... - q) |
| 3864 | c n - subprocess number |
| 3865 | c----------------------------------------------------------------------- |
| 3866 | double precision xx |
| 3867 | include 'epos.incsem' |
| 3868 | |
| 3869 | m=min(1,iabs(j))+1 |
| 3870 | if(l.ne.3)then |
| 3871 | if(l.eq.0)then |
| 3872 | psjetj=psevi(q1,scale,xx,m,1)*(psbori(s,t,0,0,n)+ !gg |
| 3873 | * psbori(s,s-t,0,0,n))/2. |
| 3874 | * +psevi(q1,scale,xx,m,2)*(psbori(s,t,1,0,n)+ !qg |
| 3875 | * psbori(s,s-t,1,0,n)) |
| 3876 | elseif(j.eq.0)then |
| 3877 | aks=psevi(q1,scale,xx,1,2)/naflav/2. !singlet contribution per quark |
| 3878 | psjetj=psevi(q1,scale,xx,1,1)*(psbori(s,t,0,1,n)+ !gq |
| 3879 | * psbori(s,s-t,0,1,n)) |
| 3880 | * +aks*(psbori(s,t,1,1,n)+psbori(s,s-t,1,1,n))/2. !qq |
| 3881 | * +aks*(psbori(s,t,-1,1,n)+psbori(s,s-t,-1,1,n)) !qq~ |
| 3882 | * +aks*(psbori(s,t,1,2,n)+psbori(s,s-t,1,2,n))*(naflav-1)*2. !qq' |
| 3883 | else |
| 3884 | akg=psevi(q1,scale,xx,2,1) !gluon contribution |
| 3885 | akns=psevi(q1,scale,xx,3,2) !nonsinglet contribution |
| 3886 | aks=(psevi(q1,scale,xx,2,2)-akns)/naflav/2. !singlet contribution |
| 3887 | if(j.eq.l)then |
| 3888 | psjetj=akg*(psbori(s,t,0,1,n)+psbori(s,s-t,0,1,n)) !gq |
| 3889 | * +(akns+aks)*(psbori(s,t,1,1,n)+psbori(s,s-t,1,1,n))/2. !qq |
| 3890 | * +aks*(psbori(s,t,-1,1,n)+psbori(s,s-t,-1,1,n)) !qq~ |
| 3891 | * +aks*(psbori(s,t,1,2,n)+psbori(s,s-t,1,2,n))*(naflav-1)*2. !qq' |
| 3892 | elseif(j.eq.-l)then |
| 3893 | psjetj=akg*(psbori(s,t,0,1,n)+psbori(s,s-t,0,1,n)) !gq |
| 3894 | * +aks*(psbori(s,t,1,1,n)+psbori(s,s-t,1,1,n))/2. !qq |
| 3895 | * +(akns+aks)*(psbori(s,t,-1,1,n)+psbori(s,s-t,-1,1,n)) !qq~ |
| 3896 | * +aks*(psbori(s,t,1,2,n)+psbori(s,s-t,1,2,n))*(naflav-1)*2.!qq' |
| 3897 | else |
| 3898 | psjetj=akg*(psbori(s,t,0,1,n)+psbori(s,s-t,0,1,n)) !gq |
| 3899 | * +aks*(psbori(s,t,1,1,n)+psbori(s,s-t,1,1,n))/2. !qq |
| 3900 | * +aks*(psbori(s,t,-1,1,n)+psbori(s,s-t,-1,1,n)) !qq~ |
| 3901 | * +(akns+aks*(naflav-1)*2.)* |
| 3902 | * (psbori(s,t,1,2,n)+psbori(s,s-t,1,2,n)) !qq' |
| 3903 | endif |
| 3904 | endif |
| 3905 | elseif(n.eq.1)then |
| 3906 | p1=s/(1.+qcmass**2/s) |
| 3907 | psjetj=psevi(q1,scale,xx,m,1)*(psbori(s,t,4,0,n)+ !cg |
| 3908 | * psbori(s,p1-t,4,0,n)) |
| 3909 | * +psevi(q1,scale,xx,m,2)*(psbori(s,t,4,1,n)+ !cq |
| 3910 | * psbori(s,p1-t,4,1,n)) |
| 3911 | else |
| 3912 | psjetj=0. |
| 3913 | endif |
| 3914 | return |
| 3915 | end |
| 3916 | |
| 3917 | c------------------------------------------------------------------------ |
| 3918 | function psjti(q1,qqcut,s,m1,l1,jdis) |
| 3919 | c----------------------------------------------------------------------- |
| 3920 | c psjti - inclusive hard cross-section interpolation - for any ordering |
| 3921 | c in the ladder |
| 3922 | c q1 - virtuality cutoff at current end of the ladder |
| 3923 | c qqcut - p_t cutoff for the born process; |
| 3924 | c s - total c.m. energy squared for the ladder |
| 3925 | c m1 - parton type at current end of the ladder (0-g, 1,2,etc.-q) |
| 3926 | c l1 - parton type at opposite end of the ladder (0-g, 1,2,etc.-q) |
| 3927 | c----------------------------------------------------------------------- |
| 3928 | dimension wi(3),wj(3),wk(3) |
| 3929 | common /psar2/ edmax,epmax |
| 3930 | common /psar19/ cstot(20,20,240) |
| 3931 | include 'epos.incsem' |
| 3932 | |
| 3933 | psjti=0. |
| 3934 | c jdis1=jdis |
| 3935 | if(jdis.eq.0)then |
| 3936 | qqmin=q1 |
| 3937 | qmax=s/4. |
| 3938 | else |
| 3939 | qqmin=max(q2min,q1/4.) |
| 3940 | qmax=s |
| 3941 | endif |
| 3942 | qq=max(qqmin,qqcut) |
| 3943 | spmin=4.*q2min |
| 3944 | s2min=4.*qq |
| 3945 | if(s.le.s2min)return |
| 3946 | |
| 3947 | if(jdis.eq.0)then |
| 3948 | smins=s2min/(1.-q2ini/qq) |
| 3949 | else |
| 3950 | smins=s2min/(1.-q2ini/qq/4.) |
| 3951 | endif |
| 3952 | if(s.le.smins)goto 1 |
| 3953 | |
| 3954 | if(s.gt.4.*qq)then |
| 3955 | tmin=2.*qq/(1.+sqrt(1.-4.*qq/s)) |
| 3956 | else |
| 3957 | tmin=2.*qq |
| 3958 | endif |
| 3959 | tmax=s/2. |
| 3960 | |
| 3961 | if(m1.ne.0.and.m1.eq.l1)then |
| 3962 | m=2 |
| 3963 | l=2 |
| 3964 | elseif(m1.ne.0.and.m1.eq.-l1)then |
| 3965 | m=3 |
| 3966 | l=1 |
| 3967 | elseif(m1.ne.0.and.l1.ne.0.and.m1.ne.l1)then |
| 3968 | m=3 |
| 3969 | l=2 |
| 3970 | else |
| 3971 | m=min(1,iabs(m1))+1 |
| 3972 | l=min(1,iabs(l1))+1 |
| 3973 | endif |
| 3974 | |
| 3975 | ml=20*(m-1)+60*(l-1)+120*jdis |
| 3976 | qli=log(q1/q2min)/log(qmax/q2min)*19.+1. |
| 3977 | qlj=log(qq/qqmin)/log(s/4./qqmin)*19.+1. |
| 3978 | sl=log(s/spmin)/log(epmax/2./spmin)*19.+1. |
| 3979 | k=int(sl) |
| 3980 | i=int(qli) |
| 3981 | j=int(qlj) |
| 3982 | if(j.lt.1)j=1 |
| 3983 | if(i.lt.1)i=1 |
| 3984 | if(k.gt.18)k=18 |
| 3985 | if(i.gt.18)i=18 |
| 3986 | if(j.gt.18)j=18 |
| 3987 | |
| 3988 | wi(2)=qli-i |
| 3989 | wi(3)=wi(2)*(wi(2)-1.)*.5 |
| 3990 | wi(1)=1.-wi(2)+wi(3) |
| 3991 | wi(2)=wi(2)-2.*wi(3) |
| 3992 | |
| 3993 | wj(2)=qlj-j |
| 3994 | wj(3)=wj(2)*(wj(2)-1.)*.5 |
| 3995 | wj(1)=1.-wj(2)+wj(3) |
| 3996 | wj(2)=wj(2)-2.*wj(3) |
| 3997 | |
| 3998 | wk(2)=sl-k |
| 3999 | wk(3)=wk(2)*(wk(2)-1.)*.5 |
| 4000 | wk(1)=1.-wk(2)+wk(3) |
| 4001 | wk(2)=wk(2)-2.*wk(3) |
| 4002 | |
| 4003 | do i1=1,3 |
| 4004 | do j1=1,3 |
| 4005 | do k1=1,3 |
| 4006 | psjti=psjti+cstot(i+i1-1,j+j1-1,k+k1+ml-1) |
| 4007 | * *wi(i1)*wj(j1)*wk(k1) |
| 4008 | enddo |
| 4009 | enddo |
| 4010 | enddo |
| 4011 | psjti=exp(psjti)*(1./tmin-1./tmax) |
| 4012 | return |
| 4013 | 1 continue |
| 4014 | psjti=psbint(q1,q2min,qqcut,s,m1,l1,jdis) |
| 4015 | return |
| 4016 | end |
| 4017 | |
| 4018 | c------------------------------------------------------------------------ |
| 4019 | subroutine psjti0(ss,sj,sjb,m1,l1) |
| 4020 | c----------------------------------------------------------------------- |
| 4021 | c psjti0 - inclusive hard cross-section interpolation - |
| 4022 | c for minimal virtuality cutoff in the ladder |
| 4023 | c s - total c.m. energy squared for the ladder, |
| 4024 | c sj - inclusive jet cross-section, |
| 4025 | c sjb - born cross-section, |
| 4026 | c m1 - parton type at current end of the ladder (0-g, 1,2,etc.-q) |
| 4027 | c l1 - parton type at opposite end of the ladder (0-g, 1,2,etc.-q) |
| 4028 | c----------------------------------------------------------------------- |
| 4029 | dimension wk(3) |
| 4030 | common /psar2/ edmax,epmax |
| 4031 | common /psar22/ cstotzero(20,4,2),csborzer(20,4,2) |
| 4032 | include 'epos.incsem' |
| 4033 | |
| 4034 | sj=0. |
| 4035 | sjb=0. |
| 4036 | if(iabs(m1).ne.4)then |
| 4037 | q2mass=0. |
| 4038 | if(m1.ne.0.and.m1.eq.l1)then |
| 4039 | m=2 |
| 4040 | l=2 |
| 4041 | elseif(m1.ne.0.and.m1.eq.-l1)then |
| 4042 | m=3 |
| 4043 | l=1 |
| 4044 | elseif(m1.ne.0.and.l1.ne.0.and.m1.ne.l1)then |
| 4045 | m=3 |
| 4046 | l=2 |
| 4047 | else |
| 4048 | m=min(1,iabs(m1))+1 |
| 4049 | l=min(1,iabs(l1))+1 |
| 4050 | endif |
| 4051 | else |
| 4052 | q2mass=qcmass**2 |
| 4053 | m=4 |
| 4054 | l=min(1,iabs(l1))+1 |
| 4055 | endif |
| 4056 | s=ss-q2mass |
| 4057 | qq=q2min |
| 4058 | spmin=4.*qq+q2mass |
| 4059 | if(s.le.spmin)return |
| 4060 | |
| 4061 | p1=s/(1.+q2mass/s) |
| 4062 | if(p1.gt.4.*qq)then |
| 4063 | tmin=2.*qq/(1.+sqrt(1.-4.*qq/p1)) |
| 4064 | else |
| 4065 | tmin=2.*qq |
| 4066 | endif |
| 4067 | tmax=.5*p1 |
| 4068 | |
| 4069 | sl=log(s/spmin)/log(epmax/2./spmin)*19.+1. |
| 4070 | k=int(sl) |
| 4071 | if(k.gt.18)k=18 |
| 4072 | wk(2)=sl-k |
| 4073 | wk(3)=wk(2)*(wk(2)-1.)*.5 |
| 4074 | wk(1)=1.-wk(2)+wk(3) |
| 4075 | wk(2)=wk(2)-2.*wk(3) |
| 4076 | |
| 4077 | do k1=1,3 |
| 4078 | sj=sj+cstotzero(k+k1-1,m,l)*wk(k1) |
| 4079 | sjb=sjb+csborzer(k+k1-1,m,l)*wk(k1) |
| 4080 | enddo |
| 4081 | |
| 4082 | sjb=exp(sjb)*(1./tmin-1./tmax) |
| 4083 | sj=max(sjb,exp(sj)*(1./tmin-1./tmax)) |
| 4084 | return |
| 4085 | end |
| 4086 | |
| 4087 | c------------------------------------------------------------------------ |
| 4088 | function psjti1(q1,q2,qqcut,s,m1,l1,jdis) |
| 4089 | c----------------------------------------------------------------------- |
| 4090 | c psjti1 - inclusive hard cross-section interpolation - for strict order |
| 4091 | c in the ladder |
| 4092 | c q1 - virtuality cutoff at current end of the ladder |
| 4093 | c q2 - virtuality cutoff at opposite end of the ladder |
| 4094 | c qqcut - p_t cutoff for the born process; |
| 4095 | c s - total c.m. energy squared for the ladder, |
| 4096 | c m1 - parton type at current end of the ladder (0-g, 1,2,etc.-q) |
| 4097 | c l1 - parton type at opposite end of the ladder (0-g, 1,2,etc.-q) |
| 4098 | c----------------------------------------------------------------------- |
| 4099 | dimension wi(3),wj(3),wk(3) |
| 4100 | common /psar2/ edmax,epmax |
| 4101 | common /psar20/ csord(20,20,240) |
| 4102 | include 'epos.incsem' |
| 4103 | double precision psuds |
| 4104 | |
| 4105 | psjti1=0. |
| 4106 | if(jdis.eq.0)then |
| 4107 | qqmin=max(q1,q2) |
| 4108 | else |
| 4109 | qqmin=max(q1,q2/4.) |
| 4110 | endif |
| 4111 | qq=max(qqmin,qqcut) |
| 4112 | spmin=4.*q2min |
| 4113 | s2min=4.*qq |
| 4114 | if(s.le.s2min)return |
| 4115 | |
| 4116 | smins=s2min/(1.-q2ini/qq) |
| 4117 | if(s.le.smins)goto 1 |
| 4118 | |
| 4119 | if(s.gt.4.*qq)then |
| 4120 | tmin=2.*qq/(1.+sqrt(1.-4.*qq/s)) |
| 4121 | else |
| 4122 | tmin=2.*qq |
| 4123 | endif |
| 4124 | tmax=s/2. |
| 4125 | |
| 4126 | if(m1.ne.0.and.m1.eq.l1)then |
| 4127 | m=2 |
| 4128 | l=2 |
| 4129 | elseif(m1.ne.0.and.m1.eq.-l1)then |
| 4130 | m=3 |
| 4131 | l=1 |
| 4132 | elseif(m1.ne.0.and.l1.ne.0.and.m1.ne.l1)then |
| 4133 | m=3 |
| 4134 | l=2 |
| 4135 | else |
| 4136 | m=min(1,iabs(m1))+1 |
| 4137 | l=min(1,iabs(l1))+1 |
| 4138 | endif |
| 4139 | |
| 4140 | ml=20*(m-1)+60*(l-1)+120*jdis |
| 4141 | qli=log(q1/q2min)/log(s/4./q2min)*19.+1. |
| 4142 | qlj=log(qq/qqmin)/log(s/4./qqmin)*19.+1. |
| 4143 | sl=log(s/spmin)/log(epmax/2./spmin)*19.+1. |
| 4144 | k=int(sl) |
| 4145 | i=int(qli) |
| 4146 | j=int(qlj) |
| 4147 | if(j.lt.1)j=1 |
| 4148 | if(i.lt.1)i=1 |
| 4149 | if(k.gt.18)k=18 |
| 4150 | if(i.gt.18)i=18 |
| 4151 | if(j.gt.18)j=18 |
| 4152 | |
| 4153 | wi(2)=qli-i |
| 4154 | wi(3)=wi(2)*(wi(2)-1.)*.5 |
| 4155 | wi(1)=1.-wi(2)+wi(3) |
| 4156 | wi(2)=wi(2)-2.*wi(3) |
| 4157 | |
| 4158 | wj(2)=qlj-j |
| 4159 | wj(3)=wj(2)*(wj(2)-1.)*.5 |
| 4160 | wj(1)=1.-wj(2)+wj(3) |
| 4161 | wj(2)=wj(2)-2.*wj(3) |
| 4162 | |
| 4163 | wk(2)=sl-k |
| 4164 | wk(3)=wk(2)*(wk(2)-1.)*.5 |
| 4165 | wk(1)=1.-wk(2)+wk(3) |
| 4166 | wk(2)=wk(2)-2.*wk(3) |
| 4167 | |
| 4168 | do i1=1,3 |
| 4169 | do j1=1,3 |
| 4170 | do k1=1,3 |
| 4171 | k2=k+k1+ml-1 |
| 4172 | psjti1=psjti1+csord(i+i1-1,j+j1-1,k2) |
| 4173 | * *wi(i1)*wj(j1)*wk(k1) |
| 4174 | enddo |
| 4175 | enddo |
| 4176 | enddo |
| 4177 | psjti1=exp(psjti1)*(1./tmin-1./tmax) |
| 4178 | |
| 4179 | if(jdis.eq.0.and.qq.gt.q2)then |
| 4180 | psjti1=psjti1*sngl(psuds(qq,l1)/psuds(q2,l1)) |
| 4181 | elseif(jdis.eq.1.and.4.*qq.gt.q2)then |
| 4182 | psjti1=psjti1*sngl(psuds(4.*qq,l1)/psuds(q2,l1)) |
| 4183 | endif |
| 4184 | return |
| 4185 | 1 continue |
| 4186 | if(jdis.eq.0)then |
| 4187 | psjti1=psbint(q1,q2,qqcut,s,m1,l1,0) |
| 4188 | else |
| 4189 | psjti1=psbint(q2,q1,qqcut,s,l1,m1,1) |
| 4190 | endif |
| 4191 | return |
| 4192 | end |
| 4193 | |
| 4194 | c------------------------------------------------------------------------ |
| 4195 | function pspdfg(xx,qqs,qq,iclpro0,j) |
| 4196 | c----------------------------------------------------------------------- |
| 4197 | c pspdf - parton distribution function |
| 4198 | c qq - virtuality scale |
| 4199 | c qqs - initial virtuality for the input distributions |
| 4200 | c iclpro0 - hadron class |
| 4201 | c j - parton type |
| 4202 | c----------------------------------------------------------------------- |
| 4203 | double precision z |
| 4204 | common/ar3/ x1(7),a1(7) |
| 4205 | include 'epos.incsem' |
| 4206 | double precision psuds |
| 4207 | |
| 4208 | pspdfg=psdfh4(xx,qqs,0.,iclpro0,j) |
| 4209 | if(j.gt.0)pspdfg=pspdfg+psdfh4(xx,qqs,0.,iclpro0,-j) !+sea contr. |
| 4210 | pspdfg=pspdfg*sngl(psuds(qq,j)/psuds(qqs,j)) |
| 4211 | |
| 4212 | xmin=xx/(1.-q2ini/qq) |
| 4213 | if(xmin.ge.1.)return |
| 4214 | |
| 4215 | dpd1=0. |
| 4216 | dpd2=0. |
| 4217 | xm=max(xmin,.3) |
| 4218 | do i=1,7 !numerical integration over zx |
| 4219 | do m=1,2 |
| 4220 | zx=1.-(1.-xm)*(.5+(m-1.5)*x1(i))**.25 |
| 4221 | z=xx/zx |
| 4222 | |
| 4223 | if(j.eq.0)then |
| 4224 | aks=psevi(qqs,qq,z,2,1) !quark contribution |
| 4225 | akg=psevi(qqs,qq,z,1,1) !gluon contribution |
| 4226 | akns=0. |
| 4227 | else |
| 4228 | akg=psevi(qqs,qq,z,1,2)/naflav/2. !gluon contribution |
| 4229 | akns=psevi(qqs,qq,z,3,2) !nonsinglet contribution |
| 4230 | aks=(psevi(qqs,qq,z,2,2)-akns)/naflav/2. !quark contribution |
| 4231 | endif |
| 4232 | |
| 4233 | fz=akg*psdfh4(zx,qqs,0.,iclpro0,0) |
| 4234 | * +akns*psdfh4(zx,qqs,0.,iclpro0,j) |
| 4235 | * +aks*(psdfh4(zx,qqs,0.,iclpro0,1)+ |
| 4236 | * 2.*psdfh4(zx,qqs,0.,iclpro0,-1) |
| 4237 | * +psdfh4(zx,qqs,0.,iclpro0,2)+2.*psdfh4(zx,qqs,0.,iclpro0,-2) |
| 4238 | * +2.*psdfh4(zx,qqs,0.,iclpro0,-3)) |
| 4239 | if(j.gt.0)fz=fz+akns*psdfh4(zx,qqs,0.,iclpro0,-j) |
| 4240 | |
| 4241 | dpd1=dpd1+a1(i)*fz/zx**2/(1.-zx)**3 |
| 4242 | enddo |
| 4243 | enddo |
| 4244 | dpd1=dpd1*(1.-xm)**4/8.*xx |
| 4245 | |
| 4246 | if(xm.gt.xmin)then |
| 4247 | do i=1,7 !numerical integration |
| 4248 | do m=1,2 |
| 4249 | zx=xx+(xm-xx)*((xmin-xx)/(xm-xx))**(.5-(m-1.5)*x1(i)) |
| 4250 | z=xx/zx |
| 4251 | |
| 4252 | if(j.eq.0)then |
| 4253 | aks=psevi(qqs,qq,z,2,1) !quark contribution |
| 4254 | akg=psevi(qqs,qq,z,1,1) !gluon contribution |
| 4255 | akns=0. |
| 4256 | else |
| 4257 | akg=psevi(qqs,qq,z,1,2)/naflav/2. !gluon contribution |
| 4258 | akns=psevi(qqs,qq,z,3,2) !nonsinglet contribution |
| 4259 | aks=(psevi(qqs,qq,z,2,2)-akns)/naflav/2. !quark contribution |
| 4260 | endif |
| 4261 | |
| 4262 | fz=akg*psdfh4(zx,qqs,0.,iclpro0,0) |
| 4263 | * +akns*psdfh4(zx,qqs,0.,iclpro0,j) |
| 4264 | * +aks*(psdfh4(zx,qqs,0.,iclpro0,1) |
| 4265 | * +2.*psdfh4(zx,qqs,0.,iclpro0,-1) |
| 4266 | * +psdfh4(zx,qqs,0.,iclpro0,2)+2.*psdfh4(zx,qqs,0.,iclpro0,-2) |
| 4267 | * +2.*psdfh4(zx,qqs,0.,iclpro0,-3)) |
| 4268 | if(j.gt.0)fz=fz+akns*psdfh4(zx,qqs,0.,iclpro0,-j) |
| 4269 | |
| 4270 | dpd2=dpd2+a1(i)*fz*(1.-xx/zx)/zx |
| 4271 | enddo |
| 4272 | enddo |
| 4273 | dpd2=dpd2*log((xm-xx)/(xmin-xx))*.5*xx |
| 4274 | endif |
| 4275 | pspdfg=pspdfg+dpd2+dpd1 |
| 4276 | return |
| 4277 | end |
| 4278 | |
| 4279 | c----------------------------------------------------------------------- |
| 4280 | subroutine psaevp |
| 4281 | c----------------------------------------------------------------------- |
| 4282 | include 'epos.inc' |
| 4283 | include 'epos.incsem' |
| 4284 | qq=xpar1 |
| 4285 | jmod=nint(xpar2) |
| 4286 | iologb=1 |
| 4287 | |
| 4288 | if(jmod.eq.0)then !??????????????ttttttt |
| 4289 | write(*,*)"no more triple Pomeron, xpar2=0 in psaevp not accepted" |
| 4290 | write(*,*)"use xpar2=1 instead" |
| 4291 | jmod=1 |
| 4292 | endif |
| 4293 | |
| 4294 | do i=1,nrbins |
| 4295 | if(iologb.eq.0)then |
| 4296 | xx=xminim+(xmaxim-xminim)*(i-.5)/nrbins |
| 4297 | else |
| 4298 | xx=xminim*(xmaxim/xminim)**((i-.5)/nrbins) |
| 4299 | endif |
| 4300 | ar(i,1)=xx |
| 4301 | ar(i,2)=0. |
| 4302 | if(jmod.eq.0)then !evolution+matrix element +3P (ours) |
| 4303 | ww=qq/xx |
| 4304 | ar(i,3)=(psdh(ww,qq,2,0)+psdh(ww,qq,2,1)+ |
| 4305 | * psdsh1(ww,qq,2,dqsh,0)+psdsh1(ww,qq,2,dqsh,1) |
| 4306 | * )/(4.*pi**2*alfe)*qq |
| 4307 | elseif(jmod.eq.1)then !evolution+matrix element (ours) |
| 4308 | ww=qq/xx |
| 4309 | ar(i,3)=(psdh(ww,qq,2,0)+psdh(ww,qq,2,1)+ |
| 4310 | * psdsh(ww,qq,2,dqsh,0)+psdsh(ww,qq,2,dqsh,1) |
| 4311 | * )/(4.*pi**2*alfe)*qq |
| 4312 | elseif(jmod.eq.2)then !just evolution (grv) |
| 4313 | ar(i,3)=(pspdfg(xx,q2min,qq,2,1)/2.25+ |
| 4314 | * pspdfg(xx,q2min,qq,2,2)/9.+ |
| 4315 | * pspdfg(xx,q2min,qq,2,-1)*2./3.6+ |
| 4316 | * pspdfg(xx,q2min,qq,2,-3)*2./9.) |
| 4317 | if(naflav.eq.4)ar(i,3)=ar(i,3)+pspdfg(xx,q2min,qq,2,-4) |
| 4318 | * *2./2.25 |
| 4319 | elseif(jmod.eq.3)then !grv |
| 4320 | ar(i,3)=(psdfh4(xx,qq,0.,2,1)+2.*psdfh4(xx,qq,0.,2,-1))/2.25 |
| 4321 | * +(psdfh4(xx,qq,0.,2,2)+2.*psdfh4(xx,qq,0.,2,-2))/9. |
| 4322 | * +2.*psdfh4(xx,qq,0.,2,-3)/9. ! |
| 4323 | elseif(jmod.eq.4)then !just evolution (ours) |
| 4324 | ar(i,3)=(fparton(xx,qq,1)/2.25+fparton(xx,qq,2)/9.+ |
| 4325 | * fparton(xx,qq,-1)*6./4.5) !uv+dv+6*sea |
| 4326 | if(naflav.eq.4)ar(i,3)=ar(i,3)+fparton(xx,qq,-4)*2./2.25 |
| 4327 | elseif(jmod.eq.5)then !grv+res |
| 4328 | ww=qq/xx |
| 4329 | ar(i,3)=(psdgh(ww,qq,0)+psdgh(ww,qq,1) |
| 4330 | * )/(4.*pi**2*alfe)*qq |
| 4331 | endif |
| 4332 | ar(i,4)=0. |
| 4333 | enddo |
| 4334 | return |
| 4335 | end |
| 4336 | |
| 4337 | c------------------------------------------------------------------------ |
| 4338 | subroutine pscs(c,s) |
| 4339 | c----------------------------------------------------------------------- |
| 4340 | c pscs - cos (c) and sin (s) generation for uniformly distributed angle |
| 4341 | c----------------------------------------------------------------------- |
| 4342 | 1 s1=2.*rangen()-1. |
| 4343 | s2=2.*rangen()-1. |
| 4344 | s3=s1*s1+s2*s2 |
| 4345 | if(s3.gt.1.)goto 1 |
| 4346 | s3=sqrt(s3) |
| 4347 | c=s1/s3 |
| 4348 | s=s2/s3 |
| 4349 | return |
| 4350 | end |
| 4351 | |
| 4352 | c------------------------------------------------------------------------ |
| 4353 | subroutine psdefrot(ep,s0x,c0x,s0,c0) |
| 4354 | c----------------------------------------------------------------------- |
| 4355 | c psdefrot - determination of the parameters the spacial rotation to the |
| 4356 | c system for 4-vector ep |
| 4357 | c s0, c0 - sin and cos for the zx-rotation; |
| 4358 | c s0x, c0x - sin and cos for the xy-rotation |
| 4359 | c----------------------------------------------------------------------- |
| 4360 | dimension ep(4) |
| 4361 | |
| 4362 | c transverse momentum square for the current parton (ep) |
| 4363 | pt2=ep(3)**2+ep(4)**2 |
| 4364 | if(pt2.ne.0.)then |
| 4365 | pt=sqrt(pt2) |
| 4366 | c system rotation to get pt=0 - euler angles are determined (c0x = cos t |
| 4367 | c s0x = sin theta, c0 = cos phi, s0 = sin phi) |
| 4368 | c0x=ep(3)/pt |
| 4369 | s0x=ep(4)/pt |
| 4370 | c total momentum for the gluon |
| 4371 | pl=sqrt(pt2+ep(2)**2) |
| 4372 | s0=pt/pl |
| 4373 | c0=ep(2)/pl |
| 4374 | else |
| 4375 | c0x=1. |
| 4376 | s0x=0. |
| 4377 | pl=abs(ep(2)) |
| 4378 | s0=0. |
| 4379 | c0=ep(2)/pl |
| 4380 | endif |
| 4381 | |
| 4382 | ep(2)=pl |
| 4383 | ep(3)=0. |
| 4384 | ep(4)=0. |
| 4385 | return |
| 4386 | end |
| 4387 | |
| 4388 | c------------------------------------------------------------------------ |
| 4389 | subroutine psdeftr(s,ep,ey) |
| 4390 | c----------------------------------------------------------------------- |
| 4391 | c psdeftr - determination of the parameters for the lorentz transform to |
| 4392 | c rest frame system for 4-vector ep of mass squared s |
| 4393 | c----------------------------------------------------------------------- |
| 4394 | dimension ey(3) |
| 4395 | double precision ep(4) |
| 4396 | |
| 4397 | do i=1,3 |
| 4398 | if(ep(i+1).eq.0.d0)then |
| 4399 | ey(i)=1. |
| 4400 | else |
| 4401 | wp=ep(1)+ep(i+1) |
| 4402 | wm=ep(1)-ep(i+1) |
| 4403 | if(wp.gt.1.e-8.and.wm/wp.lt.1.e-8)then |
| 4404 | ww=s |
| 4405 | do l=1,3 |
| 4406 | if(l.ne.i)ww=ww+ep(l+1)**2 |
| 4407 | enddo |
| 4408 | wm=ww/wp |
| 4409 | elseif(wm.gt.1.e-8.and.wp/wm.lt.1.e-8)then |
| 4410 | ww=s |
| 4411 | do l=1,3 |
| 4412 | if(l.ne.i)ww=ww+ep(l+1)**2 |
| 4413 | enddo |
| 4414 | wp=ww/wm |
| 4415 | endif |
| 4416 | ey(i)=sqrt(wm/wp) |
| 4417 | ep(1)=wp*ey(i) |
| 4418 | ep(i+1)=0. |
| 4419 | endif |
| 4420 | enddo |
| 4421 | ep(1)=dsqrt(dble(s)) |
| 4422 | return |
| 4423 | end |
| 4424 | |
| 4425 | c------------------------------------------------------------------------ |
| 4426 | function psdfh4(x,qqs,qq,icq,iq) |
| 4427 | c------------------------------------------------------------------------ |
| 4428 | c psdfh4 - GRV structure functions |
| 4429 | c------------------------------------------------------------------------ |
| 4430 | common /psar36/ alvc |
| 4431 | |
| 4432 | if(x.gt..99999)then |
| 4433 | psdfh4=0. |
| 4434 | return |
| 4435 | endif |
| 4436 | if(icq.eq.2)then |
| 4437 | sq=log(log(qqs/.232**2)/log(.23/.232**2)) |
| 4438 | if(iq.eq.0)then !gluon |
| 4439 | alg=.524 |
| 4440 | betg=1.088 |
| 4441 | aag=1.742-.93*sq |
| 4442 | bbg=-.399*sq**2 |
| 4443 | ag=7.486-2.185*sq |
| 4444 | bg=16.69-22.74*sq+5.779*sq*sq |
| 4445 | cg=-25.59+29.71*sq-7.296*sq*sq |
| 4446 | dg=2.792+2.215*sq+.422*sq*sq-.104*sq*sq*sq |
| 4447 | eg=.807+2.005*sq |
| 4448 | eeg=3.841+.361*sq |
| 4449 | psdfh4=(1.-x)**dg*(x**aag*(ag+bg*x+cg*x**2)*log(1./x)**bbg |
| 4450 | * +sq**alg*exp(-eg+sqrt(eeg*sq**betg*log(1./x)))) |
| 4451 | elseif(iq.eq.1.or.iq.eq.2)then !u_v or d_v |
| 4452 | aau=.59-.024*sq |
| 4453 | bbu=.131+.063*sq |
| 4454 | auu=2.284+.802*sq+.055*sq*sq |
| 4455 | au=-.449-.138*sq-.076*sq*sq |
| 4456 | bu=.213+2.669*sq-.728*sq*sq |
| 4457 | cu=8.854-9.135*sq+1.979*sq*sq |
| 4458 | du=2.997+.753*sq-.076*sq*sq |
| 4459 | uv=auu*x**aau*(1.-x)**du* |
| 4460 | * (1.+au*x**bbu+bu*x+cu*x**1.5) |
| 4461 | |
| 4462 | aad=.376 |
| 4463 | bbd=.486+.062*sq |
| 4464 | add=.371+.083*sq+.039*sq*sq |
| 4465 | ad=-.509+3.31*sq-1.248*sq*sq |
| 4466 | bd=12.41-10.52*sq+2.267*sq*sq |
| 4467 | ccd=6.373-6.208*sq+1.418*sq*sq |
| 4468 | dd=3.691+.799*sq-.071*sq*sq |
| 4469 | dv=add*x**aad*(1.-x)**dd* |
| 4470 | * (1.+ad*x**bbd+bd*x+ccd*x**1.5) |
| 4471 | |
| 4472 | if(iq.eq.1)then !u_v |
| 4473 | psdfh4=uv |
| 4474 | elseif(iq.eq.2)then !d_v |
| 4475 | psdfh4=dv |
| 4476 | endif |
| 4477 | elseif(iq.eq.-3)then !s_sea |
| 4478 | als=.914 |
| 4479 | bets=.577 |
| 4480 | aas=1.798-.596*sq |
| 4481 | as=-5.548+3.669*sqrt(sq)-.616*sq |
| 4482 | bs=18.92-16.73*sqrt(sq)+5.168*sq |
| 4483 | ds=6.379-.35*sq+.142*sq*sq |
| 4484 | es=3.981+1.638*sq |
| 4485 | ees=6.402 |
| 4486 | psdfh4=(1.-x)**ds*sq**als/log(1./x)**aas*(1.+as*sqrt(x) |
| 4487 | * +bs*x)*exp(-es+sqrt(ees*sq**bets*log(1./x))) |
| 4488 | elseif(iabs(iq).lt.3)then !u_sea or d_sea |
| 4489 | aadel=.409-.005*sq |
| 4490 | bbdel=.799+.071*sq |
| 4491 | addel=.082+.014*sq+.008*sq*sq |
| 4492 | adel=-38.07+36.13*sq-.656*sq*sq |
| 4493 | bdel=90.31-74.15*sq+7.645*sq*sq |
| 4494 | ccdel=0. |
| 4495 | ddel=7.486+1.217*sq-.159*sq*sq |
| 4496 | delv=addel*x**aadel*(1.-x)**ddel* |
| 4497 | * (1.+adel*x**bbdel+bdel*x+ccdel*x**1.5) |
| 4498 | |
| 4499 | alud=1.451 |
| 4500 | betud=.271 |
| 4501 | aaud=.41-.232*sq |
| 4502 | bbud=.534-.457*sq |
| 4503 | aud=.89-.14*sq |
| 4504 | bud=-.981 |
| 4505 | cud=.32+.683*sq |
| 4506 | dud=4.752+1.164*sq+.286*sq*sq |
| 4507 | eud=4.119+1.713*sq |
| 4508 | eeud=.682+2.978*sq |
| 4509 | udsea=(1.-x)**dud*(x**aaud*(aud+bud*x+cud*x**2) |
| 4510 | * *log(1./x)**bbud+sq**alud*exp(-eud+sqrt(eeud*sq**betud* |
| 4511 | * log(1./x)))) |
| 4512 | |
| 4513 | if(iq.eq.-1)then !u_sea |
| 4514 | psdfh4=(udsea-delv)/2. |
| 4515 | elseif(iq.eq.-2)then !d_sea |
| 4516 | psdfh4=(udsea+delv)/2. |
| 4517 | endif |
| 4518 | else |
| 4519 | psdfh4=0. |
| 4520 | endif |
| 4521 | elseif(icq.eq.1.or.icq.eq.3)then |
| 4522 | sq=log(log(qqs/.204**2)/log(.26/.204**2)) |
| 4523 | if(iq.eq.1.or.iq.eq.2)then |
| 4524 | aapi=.517-.02*sq |
| 4525 | api=-.037-.578*sq |
| 4526 | bpi=.241+.251*sq |
| 4527 | dpi=.383+.624*sq |
| 4528 | anorm=1.212+.498*sq+.009*sq**2 |
| 4529 | psdfh4=.5*anorm*x**aapi*(1.-x)**dpi* |
| 4530 | * (1.+api*sqrt(x)+bpi*x) |
| 4531 | elseif(iq.eq.0)then |
| 4532 | alfpi=.504 |
| 4533 | betpi=.226 |
| 4534 | aapi=2.251-1.339*sqrt(sq) |
| 4535 | api=2.668-1.265*sq+.156*sq**2 |
| 4536 | bbpi=0. |
| 4537 | bpi=-1.839+.386*sq |
| 4538 | cpi=-1.014+.92*sq-.101*sq**2 |
| 4539 | dpi=-.077+1.466*sq |
| 4540 | epi=1.245+1.833*sq |
| 4541 | eppi=.51+3.844*sq |
| 4542 | psdfh4=(1.-x)**dpi*(x**aapi*(api+bpi*sqrt(x)+cpi*x)* |
| 4543 | * log(1./x)**bbpi+sq**alfpi* |
| 4544 | * exp(-epi+sqrt(eppi*sq**betpi*log(1./x)))) |
| 4545 | elseif(iq.eq.-3)then |
| 4546 | alfpi=.823 |
| 4547 | betpi=.65 |
| 4548 | aapi=1.036-.709*sq |
| 4549 | api=-1.245+.713*sq |
| 4550 | bpi=5.58-1.281*sq |
| 4551 | dpi=2.746-.191*sq |
| 4552 | epi=5.101+1.294*sq |
| 4553 | eppi=4.854-.437*sq |
| 4554 | psdfh4=sq**alfpi/log(1./x)**aapi*(1.-x)**dpi* |
| 4555 | * (1.+api*sqrt(x)+bpi*x)* |
| 4556 | * exp(-epi+sqrt(eppi*sq**betpi*log(1./x))) |
| 4557 | elseif(iabs(iq).lt.3)then |
| 4558 | alfpi=1.147 |
| 4559 | betpi=1.241 |
| 4560 | aapi=.309-.134*sqrt(sq) |
| 4561 | api=.219-.054*sq |
| 4562 | bbpi=.893-.264*sqrt(sq) |
| 4563 | bpi=-.593+.24*sq |
| 4564 | cpi=1.1-.452*sq |
| 4565 | dpi=3.526+.491*sq |
| 4566 | epi=4.521+1.583*sq |
| 4567 | eppi=3.102 |
| 4568 | psdfh4=(1.-x)**dpi*(x**aapi*(api+bpi*sqrt(x)+cpi*x)* |
| 4569 | * log(1./x)**bbpi+sq**alfpi* |
| 4570 | * exp(-epi+sqrt(eppi*sq**betpi*log(1./x)))) |
| 4571 | else |
| 4572 | psdfh4=0. |
| 4573 | endif |
| 4574 | elseif(icq.eq.0)then |
| 4575 | sq=log(log(qqs/.204**2)/log(.26/.204**2)) |
| 4576 | if(iq.eq.0)then |
| 4577 | alfpi=.504 |
| 4578 | betpi=.226 |
| 4579 | aapi=2.251-1.339*sqrt(sq) |
| 4580 | api=2.668-1.265*sq+.156*sq**2 |
| 4581 | bbpi=0. |
| 4582 | bpi=-1.839+.386*sq |
| 4583 | cpi=-1.014+.92*sq-.101*sq**2 |
| 4584 | dpi=-.077+1.466*sq |
| 4585 | epi=1.245+1.833*sq |
| 4586 | eppi=.51+3.844*sq |
| 4587 | psdfh4=(1.-x)**dpi*(x**aapi*(api+bpi*sqrt(x)+cpi*x)* |
| 4588 | * log(1./x)**bbpi+sq**alfpi* |
| 4589 | * exp(-epi+sqrt(eppi*sq**betpi*log(1./x)))) |
| 4590 | * *.543 |
| 4591 | else |
| 4592 | alfpi=.823 |
| 4593 | betpi=.65 |
| 4594 | aapi=1.036-.709*sq |
| 4595 | api=-1.245+.713*sq |
| 4596 | bpi=5.58-1.281*sq |
| 4597 | dpi=2.746-.191*sq |
| 4598 | epi=5.101+1.294*sq |
| 4599 | eppi=4.854-.437*sq |
| 4600 | str=sq**alfpi/log(1./x)**aapi*(1.-x)**dpi* |
| 4601 | * (1.+api*sqrt(x)+bpi*x)* |
| 4602 | * exp(-epi+sqrt(eppi*sq**betpi*log(1./x))) |
| 4603 | if(iq.eq.3)then |
| 4604 | psdfh4=str*.543*2. |
| 4605 | else |
| 4606 | aapi=.517-.02*sq |
| 4607 | api=-.037-.578*sq |
| 4608 | bpi=.241+.251*sq |
| 4609 | dpi=.383+.624*sq |
| 4610 | anorm=1.212+.498*sq+.009*sq**2 |
| 4611 | val=.5*anorm*x**aapi*(1.-x)**dpi* |
| 4612 | * (1.+api*sqrt(x)+bpi*x) |
| 4613 | |
| 4614 | alfpi=1.147 |
| 4615 | betpi=1.241 |
| 4616 | aapi=.309-.134*sqrt(sq) |
| 4617 | api=.219-.054*sq |
| 4618 | bbpi=.893-.264*sqrt(sq) |
| 4619 | bpi=-.593+.24*sq |
| 4620 | cpi=1.1-.452*sq |
| 4621 | dpi=3.526+.491*sq |
| 4622 | epi=4.521+1.583*sq |
| 4623 | eppi=3.102 |
| 4624 | sea=(1.-x)**dpi*(x**aapi*(api+bpi*sqrt(x)+cpi*x)* |
| 4625 | * log(1./x)**bbpi+sq**alfpi* |
| 4626 | * exp(-epi+sqrt(eppi*sq**betpi*log(1./x)))) |
| 4627 | if(iq.eq.1)then |
| 4628 | psdfh4=(.836*(val+2.*sea)-.587*str) |
| 4629 | elseif(iq.eq.2)then |
| 4630 | psdfh4=(.25*(val+2.*sea)+.587*str) |
| 4631 | else |
| 4632 | psdfh4=0. |
| 4633 | endif |
| 4634 | endif |
| 4635 | endif |
| 4636 | psdfh4=psdfh4/(1.+qq/.59)**2 |
| 4637 | |
| 4638 | elseif(icq.eq.4.and.iq.eq.1)then |
| 4639 | psdfh4=x**3*(1.-x)**alvc*(alvc+3.)*(alvc+2.)*(alvc+1.) |
| 4640 | else |
| 4641 | psdfh4=0. |
| 4642 | endif |
| 4643 | return |
| 4644 | end |
| 4645 | |
| 4646 | |
| 4647 | c------------------------------------------------------------------------ |
| 4648 | function psfap(x,j,l) |
| 4649 | c----------------------------------------------------------------------- |
| 4650 | c psfap - altarelli-parisi function (multiplied by x) |
| 4651 | c x - light cone momentum share value, |
| 4652 | c j - type of the parent parton (0-g;1,2,etc.-q) |
| 4653 | c l - type of the daughter parton (0-g;1,2,etc.-q) |
| 4654 | c----------------------------------------------------------------------- |
| 4655 | double precision x |
| 4656 | include 'epos.incsem' |
| 4657 | |
| 4658 | if(j.eq.0)then |
| 4659 | if(l.eq.0)then |
| 4660 | psfap=((1.d0-x)/x+x/(1.d0-x)+x*(1.d0-x))*6.d0 |
| 4661 | else |
| 4662 | psfap=(x**2+(1.d0-x)**2)*naflav |
| 4663 | endif |
| 4664 | else |
| 4665 | if(l.eq.0)then |
| 4666 | psfap=(1.d0+(1.d0-x)**2)/x/.75d0 |
| 4667 | else |
| 4668 | psfap=(x**2+1.d0)/(1.d0-x)/.75d0 |
| 4669 | endif |
| 4670 | endif |
| 4671 | return |
| 4672 | end |
| 4673 | |
| 4674 | cc------------------------------------------------------------------------ |
| 4675 | c function psgen(a1,a2) |
| 4676 | cc----------------------------------------------------------------------- |
| 4677 | cc psgen - x-values generation according to distribution |
| 4678 | cc x1^(-a1) x2^(-0.5) |
| 4679 | cc----------------------------------------------------------------------- |
| 4680 | c common/lept1/engy,elepti,elepto,angmue,icinpu |
| 4681 | c |
| 4682 | c aa=max(a1,a2) |
| 4683 | c1 continue |
| 4684 | c if(aa.lt.1.)then |
| 4685 | c x1=.5*rangen()**(1./(1.-aa)) |
| 4686 | c elseif(aa.eq.1.)then |
| 4687 | c x1=.5/engy**rangen() |
| 4688 | c else |
| 4689 | c x1=.5*(1.+rangen()*(engy**(aa-1.)-1.))**(1./(1.-aa)) |
| 4690 | c endif |
| 4691 | c if(x1.lt.1.e-7.or.x1.gt..999999)then |
| 4692 | c goto 1 |
| 4693 | c endif |
| 4694 | c if(rangen().lt..5)then |
| 4695 | c gb=x1**(aa-a1)*.5**aa/(1.-x1)**a2 |
| 4696 | c else |
| 4697 | c x1=1.-x1 |
| 4698 | c gb=(1.-x1)**(aa-a2)*.5**aa/x1**a1 |
| 4699 | c endif |
| 4700 | c if(rangen().gt.gb)goto 1 |
| 4701 | c psgen=x1 |
| 4702 | c return |
| 4703 | c end |
| 4704 | c |
| 4705 | c------------------------------------------------------------------------ |
| 4706 | function psidd(icc) |
| 4707 | c----------------------------------------------------------------------- |
| 4708 | c psidd - kink type decoder |
| 4709 | c----------------------------------------------------------------------- |
| 4710 | if(icc.eq.0)then !g |
| 4711 | psidd=9 |
| 4712 | elseif(iabs(icc).le.2)then !u,u~,d,d~ |
| 4713 | psidd=icc |
| 4714 | elseif(iabs(icc).eq.4)then !s,s~ |
| 4715 | psidd=icc/4*3 |
| 4716 | elseif(iabs(icc).gt.10)then !c,c~ etc. |
| 4717 | psidd=icc/10 |
| 4718 | elseif(icc.eq.3)then !ud |
| 4719 | psidd=1200 |
| 4720 | elseif(icc.eq.-3)then !u~d~ |
| 4721 | psidd=-1200 |
| 4722 | elseif(icc.eq.6)then !uu |
| 4723 | psidd=1100 |
| 4724 | elseif(icc.eq.-6)then !u~u~ |
| 4725 | psidd=-1100 |
| 4726 | elseif(icc.eq.7)then !dd |
| 4727 | psidd=2200 |
| 4728 | elseif(icc.eq.-7)then !d~d~ |
| 4729 | psidd=-2200 |
| 4730 | else |
| 4731 | write (*,*)'psidd?????????',icc |
| 4732 | endif |
| 4733 | return |
| 4734 | end |
| 4735 | |
| 4736 | cc------------------------------------------------------------------------ |
| 4737 | c function pslam(s,a,b) |
| 4738 | cc----------------------------------------------------------------------- |
| 4739 | cc kinematical function for two particle decay - maximal pt-value |
| 4740 | cc a - first particle mass squared, |
| 4741 | cc b - second particle mass squared, |
| 4742 | cc s - two particle invariant mass squared |
| 4743 | cc----------------------------------------------------------------------- |
| 4744 | c pslam=.25/s*(s+a-b)**2-a |
| 4745 | c return |
| 4746 | c end |
| 4747 | c |
| 4748 | c------------------------------------------------------------------------ |
| 4749 | function psjvrg1(qt,s,y0) |
| 4750 | c----------------------------------------------------------------------- |
| 4751 | common /ar3/ x1(7),a1(7) |
| 4752 | common /cnsta/ pi,pii,hquer,prom,piom,ainfin |
| 4753 | include 'epos.incsem' |
| 4754 | double precision xt,ymin,ymax,y,xmin,xmax,xx1,xx2 |
| 4755 | |
| 4756 | psjvrg1=0. |
| 4757 | if(s.le.4.*qt)return |
| 4758 | |
| 4759 | xt=2.d0*sqrt(dble(qt)/dble(s)) |
| 4760 | ymax=min(dble(y0),log(1d0/xt+sqrt((1d0/xt-1d0)*(1d0/xt+1d0)))) |
| 4761 | ymin=-ymax |
| 4762 | |
| 4763 | do i=1,7 |
| 4764 | do m=1,2 |
| 4765 | y=.5d0*(ymax+ymin+(ymin-ymax)*dble((2*m-3)*x1(i))) |
| 4766 | xmin=xt**2/2.d0/(2.d0-xt*exp(-y)) |
| 4767 | xmax=1.d0-xt*exp(y)/2.d0 |
| 4768 | |
| 4769 | fx=0. |
| 4770 | do i1=1,7 |
| 4771 | do m1=1,2 |
| 4772 | xx1=xt*exp(y)/2d0+xmin*(xmax/xmin)**dble(.5+x1(i1)*(m1-1.5)) |
| 4773 | xx2=xt*exp(-y)*xx1/(2.d0*xx1-xt*exp(y)) |
| 4774 | z=sngl(xx1*xx2) |
| 4775 | sh=z*s |
| 4776 | t=sngl(dble(sh)/2d0*(1d0 |
| 4777 | & -sqrt(max(0d0,1d0-4d0*dble(qt)/dble(sh))))) |
| 4778 | ft=psjvrx(t,qt,sngl(xx1),sngl(xx2),sh) |
| 4779 | fx=fx+a1(i1)*ft/sh**2 |
| 4780 | enddo |
| 4781 | enddo |
| 4782 | fx=fx*sngl(log(xmax/xmin)) |
| 4783 | psjvrg1=psjvrg1+a1(i)*fx |
| 4784 | enddo |
| 4785 | enddo |
| 4786 | psjvrg1=psjvrg1*sngl(ymax-ymin)*pi**3 |
| 4787 | **pssalf(qt/qcdlam)**2*sqrt(qt) |
| 4788 | return |
| 4789 | end |
| 4790 | |
| 4791 | c----------------------------------------------------------------------- |
| 4792 | function psjvrx(t,qt,xx1,xx2,s) |
| 4793 | c----------------------------------------------------------------------- |
| 4794 | include 'epos.incsem' |
| 4795 | |
| 4796 | g1=psdfh4(xx1,qt,0.,2,0) |
| 4797 | ub1=psdfh4(xx1,qt,0.,2,-1) |
| 4798 | u1=psdfh4(xx1,qt,0.,2,1)+ub1 |
| 4799 | db1=psdfh4(xx1,qt,0.,2,-2) |
| 4800 | d1=psdfh4(xx1,qt,0.,2,2)+db1 |
| 4801 | sb1=psdfh4(xx1,qt,0.,2,-3) |
| 4802 | s1=sb1 |
| 4803 | g2=psdfh4(xx2,qt,0.,2,0) |
| 4804 | ub2=psdfh4(xx2,qt,0.,2,-1) |
| 4805 | u2=psdfh4(xx2,qt,0.,2,1)+ub2 |
| 4806 | db2=psdfh4(xx2,qt,0.,2,-2) |
| 4807 | d2=psdfh4(xx2,qt,0.,2,2)+db2 |
| 4808 | sb2=psdfh4(xx2,qt,0.,2,-3) |
| 4809 | s2=sb2 |
| 4810 | |
| 4811 | psjvrx=g1*g2*(psbori(s,t,0,0,1)+psbori(s,s-t,0,0,1) |
| 4812 | *+psbori(s,t,0,0,2)+psbori(s,s-t,0,0,2))/2. |
| 4813 | *+(psbori(s,t,0,1,1)+psbori(s,s-t,0,1,1))* |
| 4814 | *(g2*(u1+ub1+d1+db1+s1+sb1)+g1*(u2+ub2+d2+db2+s2+sb2)) |
| 4815 | *+(psbori(s,t,1,1,1)+psbori(s,s-t,1,1,1))/2.* |
| 4816 | *(u1*u2+ub1*ub2+d1*d2+db1*db2+s1*s2+sb1*sb2) |
| 4817 | *+(psbori(s,t,1,-1,1)+psbori(s,s-t,1,-1,1)+psbori(s,t,1,-1,2)+ |
| 4818 | *psbori(s,s-t,1,-1,2)+psbori(s,t,1,-1,3)+psbori(s,s-t,1,-1,3))* |
| 4819 | *(u1*ub2+ub1*u2+d1*db2+db1*d2+s1*sb2+sb1*s2) |
| 4820 | *+(psbori(s,t,1,2,1)+psbori(s,s-t,1,2,1))* |
| 4821 | *((u1+ub1)*(d2+db2+s2+sb2)+(u2+ub2)*(d1+db1+s1+sb1)+ |
| 4822 | *(d1+db1)*(u2+ub2+s2+sb2)+(d2+db2)*(u1+ub1+s1+sb1)+ |
| 4823 | *(s1+sb1)*(u2+ub2+d2+db2)+(s2+sb2)*(u1+ub1+d1+db1)) |
| 4824 | return |
| 4825 | end |
| 4826 | |
| 4827 | c------------------------------------------------------------------------ |
| 4828 | function psjwo1(qt,s,y0) |
| 4829 | c----------------------------------------------------------------------- |
| 4830 | common /ar3/ x1(7),a1(7) |
| 4831 | common /cnsta/ pi,pii,hquer,prom,piom,ainfin |
| 4832 | double precision xt,ymax,ymin,y,xmin,xmax,xx1,xx2 |
| 4833 | include 'epos.incsem' |
| 4834 | |
| 4835 | psjwo1=0. |
| 4836 | if(s.le.4.*qt)return |
| 4837 | |
| 4838 | xt=2.d0*sqrt(dble(qt)/dble(s)) |
| 4839 | ymax=min(dble(y0),log(1d0/xt+sqrt((1d0/xt-1d0)*(1d0/xt+1d0)))) |
| 4840 | ymin=-ymax |
| 4841 | |
| 4842 | do i=1,7 |
| 4843 | do m=1,2 |
| 4844 | y=.5d0*(ymax+ymin+(ymin-ymax)*dble(2*m-3)*dble(x1(i))) |
| 4845 | xmin=xt**2/2.d0/(2.d0-xt*exp(-y)) |
| 4846 | xmax=1.d0-xt*exp(y)/2.d0 |
| 4847 | |
| 4848 | fx=0. |
| 4849 | do i1=1,7 |
| 4850 | do m1=1,2 |
| 4851 | xx1=xt*exp(y)/2.d0+xmin*(xmax/xmin)**dble(.5+x1(i1)*(m1-1.5)) |
| 4852 | xx2=xt*exp(-y)/(2.d0-xt*exp(y)/xx1) |
| 4853 | z=sngl(xx1*xx2) |
| 4854 | sh=z*s |
| 4855 | t=sngl(dble(sh)/2d0*(1d0-sqrt(1d0-4d0*dble(qt)/dble(sh)))) |
| 4856 | ft=psjwox(t,qt,sngl(xx1),sngl(xx2),sh) |
| 4857 | fx=fx+a1(i1)*ft/sh**2 |
| 4858 | enddo |
| 4859 | enddo |
| 4860 | fx=fx*log(xmax/xmin) |
| 4861 | psjwo1=psjwo1+a1(i)*fx |
| 4862 | enddo |
| 4863 | enddo |
| 4864 | psjwo1=psjwo1*sngl(ymax-ymin)*pi**3 |
| 4865 | **pssalf(qt/qcdlam)**2*sqrt(qt) |
| 4866 | return |
| 4867 | end |
| 4868 | |
| 4869 | c----------------------------------------------------------------------- |
| 4870 | function psjwox(t,qt,xx1,xx2,s) |
| 4871 | c----------------------------------------------------------------------- |
| 4872 | double precision x,scale,upv1,dnv1,sea1,str1,chm1,gl1, |
| 4873 | *upv2,dnv2,sea2,str2,chm2,gl2 |
| 4874 | scale=sqrt(qt) |
| 4875 | x=xx1 |
| 4876 | call strdo1(x,scale,upv1,dnv1,sea1,str1,chm1,gl1) |
| 4877 | x=xx2 |
| 4878 | call strdo1(x,scale,upv2,dnv2,sea2,str2,chm2,gl2) |
| 4879 | |
| 4880 | psjwox=gl1*gl2*(psbori(s,t,0,0,1)+psbori(s,s-t,0,0,1) |
| 4881 | *+psbori(s,t,0,0,2)+psbori(s,s-t,0,0,2)+psbori(s,t,0,0,3) |
| 4882 | *+psbori(s,s-t,0,0,3))/2. |
| 4883 | *+(psbori(s,t,0,1,1)+psbori(s,s-t,0,1,1) |
| 4884 | *+psbori(s,t,0,1,2)+psbori(s,s-t,0,1,2)+psbori(s,t,0,1,3) |
| 4885 | *+psbori(s,s-t,0,1,3))*(gl2*(upv1+dnv1+4.*sea1+2.*str1+2.*chm1)+ |
| 4886 | *gl1*(upv2+dnv2+4.*sea2+2.*str2+2.*chm2)) |
| 4887 | *+(psbori(s,t,1,1,1)+psbori(s,s-t,1,1,1) |
| 4888 | *+psbori(s,t,1,1,2)+psbori(s,s-t,1,1,2)+psbori(s,t,1,1,3)+ |
| 4889 | *psbori(s,s-t,1,1,3))/2.* |
| 4890 | *((upv1+sea1)*(upv2+sea2)+(dnv1+sea1)*(dnv2+sea2)+2.*sea1*sea2 |
| 4891 | *+2.*str1*str2+2.*chm1*chm2) |
| 4892 | *+(psbori(s,t,1,-1,1)+psbori(s,s-t,1,-1,1)+psbori(s,t,1,-1,2)+ |
| 4893 | *psbori(s,s-t,1,-1,2)+psbori(s,t,1,-1,3)+psbori(s,s-t,1,-1,3))* |
| 4894 | *((upv1+sea1)*sea2+sea1*(upv2+sea2)+(dnv1+sea1)*sea2+ |
| 4895 | *sea1*(dnv2+sea2)+2.*str1*str2+2.*chm1*chm2) |
| 4896 | *+(psbori(s,t,1,2,1) |
| 4897 | *+psbori(s,s-t,1,2,1)+psbori(s,t,1,2,2)+psbori(s,s-t,1,2,2) |
| 4898 | *+psbori(s,t,1,2,3)+psbori(s,s-t,1,2,3))* |
| 4899 | *(upv1*dnv2+upv2*dnv1+(upv1+dnv1)*(2.*sea2+2.*str2+2.*chm2)+ |
| 4900 | *(upv2+dnv2)*(2.*sea1+2.*str1+2.*chm1)+ |
| 4901 | *4.*sea1*(2.*sea2+2.*str2+2.*chm2)+2.*str1*(4.*sea2+2.*chm2)+ |
| 4902 | *2.*chm1*(4.*sea2+2.*str2)) |
| 4903 | return |
| 4904 | end |
| 4905 | |
| 4906 | c------------------------------------------------------------------------ |
| 4907 | subroutine pslcsh(wp1,wm1,wp2,wm2,samqt,amqpt) |
| 4908 | c----------------------------------------------------------------------- |
| 4909 | c pslcsh - sh pomeron lc momentum sharing between two strings |
| 4910 | c------------------------------------------------------------------------ |
| 4911 | double precision amqt(4),yqm(4),yqm1(4),xlp(4),xlm(4),am23,sx,y2 |
| 4912 | *,wp1,wp2,wm1,wm2,s,sq,psutz,yqmax,y,amjp,amjm,y1,s12,s34,x34,amqpt |
| 4913 | dimension samqt(4) |
| 4914 | include 'epos.inc' |
| 4915 | |
| 4916 | s=wp1*wm1 |
| 4917 | sq=dsqrt(s) |
| 4918 | do i=1,4 |
| 4919 | amqt(i)=dble(samqt(i)) |
| 4920 | yqm(i)=dlog(sq/amqt(i)*psutz(s,amqt(i)**2,(amqpt-amqt(i))**2)) |
| 4921 | enddo |
| 4922 | yqmax=max(yqm(1),yqm(2)) |
| 4923 | |
| 4924 | 1 y=yqmax*dble(rangen()) |
| 4925 | j=int(1.5+rangen()) |
| 4926 | if(y.gt.yqm(j))goto 1 |
| 4927 | |
| 4928 | amjp=amqt(j)*dexp(y) |
| 4929 | amjm=amqt(j)*dexp(-y) |
| 4930 | do i=3,4 |
| 4931 | am23=amqt(3-j)+amqt(7-i) |
| 4932 | sx=(am23+amjp)*(am23+amjm) |
| 4933 | yqm1(i)=dlog(sq/amqt(i)*psutz(s,amqt(i)**2,sx)) |
| 4934 | enddo |
| 4935 | yqmax1=max(yqm1(3),yqm1(4)) |
| 4936 | if(dble(rangen()).gt.yqmax1/max(yqm(3),yqm(4)))goto 1 |
| 4937 | |
| 4938 | y1=yqmax1*dble(rangen()) |
| 4939 | j1=int(3.5+rangen()) |
| 4940 | if(y1.gt.yqm1(j1))goto 1 |
| 4941 | |
| 4942 | amjp1=amqt(j1)*exp(y1) |
| 4943 | amjm1=amqt(j1)*exp(-y1) |
| 4944 | s12=(amqt(3-j)+amjp)*(amqt(3-j)+amjm) |
| 4945 | s34=(amqt(7-j1)+amjp1)*(amqt(7-j1)+amjm1) |
| 4946 | y2=dlog(sq/(amqt(3-j)+amjp)*psutz(s,s12,s34)) |
| 4947 | |
| 4948 | xlp(j)=amqt(j)/sq*dexp(y+y2) |
| 4949 | xlm(j)=amqt(j)/sq*dexp(-y-y2) |
| 4950 | xlp(3-j)=amqt(3-j)/sq*dexp(y2) |
| 4951 | xlm(3-j)=amqt(3-j)/sq*dexp(-y2) |
| 4952 | x34=1.-xlm(1)-xlm(2) |
| 4953 | xlm(7-j1)=x34/(1.+amjp1/amqt(7-j1)) |
| 4954 | xlm(j1)=x34-xlm(7-j1) |
| 4955 | c write (*,*)'xlc',xlp(1),xlp(2),xlm(3),xlm(4) |
| 4956 | if(dble(rangen()).gt.(xlp(1)*xlp(2)*xlm(3)*xlm(4))**(-alpqua)* |
| 4957 | *(xlp(j)*(1.d0-xlp(j))*xlm(j1)*(1.d0-xlm(j1))))goto 1 |
| 4958 | |
| 4959 | wp2=xlp(2)*wp1 |
| 4960 | wp1=xlp(1)*wp1 |
| 4961 | wm2=xlm(4)*wm1 |
| 4962 | wm1=xlm(3)*wm1 |
| 4963 | c write (*,*)'wp1,wm1,wp2,wm2',wp1,wm1,wp2,wm2 |
| 4964 | return |
| 4965 | end |
| 4966 | |
| 4967 | c------------------------------------------------------------------------ |
| 4968 | function psnorm(ep) |
| 4969 | c----------------------------------------------------------------------- |
| 4970 | c 4-vector squared calculation |
| 4971 | c----------------------------------------------------------------------- |
| 4972 | double precision sm2,ep(4) |
| 4973 | sm2=ep(1)**2 |
| 4974 | do i=1,3 |
| 4975 | sm2=sm2-ep(i+1)**2 |
| 4976 | enddo |
| 4977 | psnorm=sm2 |
| 4978 | return |
| 4979 | end |
| 4980 | |
| 4981 | c------------------------------------------------------------------------ |
| 4982 | subroutine psrotat(ep,s0x,c0x,s0,c0) |
| 4983 | c----------------------------------------------------------------------- |
| 4984 | c psrotat - spacial rotation to the lab. system for 4-vector ep |
| 4985 | c s0, c0 - sin and cos for the zx-rotation; |
| 4986 | c s0x, c0x - sin and cos for the xy-rotation |
| 4987 | c----------------------------------------------------------------------- |
| 4988 | dimension ep(4),ep1(3) |
| 4989 | |
| 4990 | ep1(3)=ep(4) |
| 4991 | ep1(2)=ep(2)*s0+ep(3)*c0 |
| 4992 | ep1(1)=ep(2)*c0-ep(3)*s0 |
| 4993 | |
| 4994 | ep(2)=ep1(1) |
| 4995 | ep(4)=ep1(2)*s0x+ep1(3)*c0x |
| 4996 | ep(3)=ep1(2)*c0x-ep1(3)*s0x |
| 4997 | return |
| 4998 | end |
| 4999 | |
| 5000 | cc------------------------------------------------------------------------ |
| 5001 | c subroutine psrotat1(ep,s0x,c0x,s0,c0) |
| 5002 | cc----------------------------------------------------------------------- |
| 5003 | cc psrotat - spacial rotation to the lab. system for 4-vector ep |
| 5004 | cc s0, c0 - sin and cos for the zx-rotation; |
| 5005 | cc s0x, c0x - sin and cos for the xy-rotation |
| 5006 | cc----------------------------------------------------------------------- |
| 5007 | c dimension ep(4),ep1(3) |
| 5008 | c |
| 5009 | c ep1(1)=ep(2) |
| 5010 | c ep1(3)=-ep(3)*s0x+ep(4)*c0x |
| 5011 | c ep1(2)=ep(3)*c0x+ep(4)*s0x |
| 5012 | c |
| 5013 | c ep(4)=ep1(3) |
| 5014 | c ep(3)=-ep1(1)*s0+ep1(2)*c0 |
| 5015 | c ep(2)=ep1(1)*c0+ep1(2)*s0 |
| 5016 | c return |
| 5017 | c end |
| 5018 | c |
| 5019 | c----------------------------------------------------------------------- |
| 5020 | function pssalf(qq) |
| 5021 | c----------------------------------------------------------------------- |
| 5022 | c pssalf - effective qcd coupling (alpha_s/2/pi) |
| 5023 | c----------------------------------------------------------------------- |
| 5024 | include "epos.incsem" |
| 5025 | pssalf=2./(11.-naflav/1.5)/log(qq) |
| 5026 | return |
| 5027 | end |
| 5028 | |
| 5029 | c------------------------------------------------------------------------ |
| 5030 | subroutine pstrans(ep,ey,jj) |
| 5031 | c----------------------------------------------------------------------- |
| 5032 | c pstrans - lorentz boosts according to the parameters ey ( determining |
| 5033 | c shift along the z,x,y-axis respectively (ey(1),ey(2),ey(3))) |
| 5034 | c jj=1 - inverse transformation to the lab. system; |
| 5035 | c jj=-1 - direct transformation |
| 5036 | c----------------------------------------------------------------------- |
| 5037 | dimension ey(3),ep(4) |
| 5038 | |
| 5039 | if(jj.eq.1)then |
| 5040 | c lorentz transform to lab. system according to 1/ey(i) parameters |
| 5041 | do i=1,3 |
| 5042 | if(ey(4-i).ne.1.)then |
| 5043 | wp=(ep(1)+ep(5-i))/ey(4-i) |
| 5044 | wm=(ep(1)-ep(5-i))*ey(4-i) |
| 5045 | ep(1)=.5*(wp+wm) |
| 5046 | ep(5-i)=.5*(wp-wm) |
| 5047 | endif |
| 5048 | enddo |
| 5049 | else |
| 5050 | c lorentz transform to lab. system according to ey(i) parameters |
| 5051 | do i=1,3 |
| 5052 | if(ey(i).ne.1.)then |
| 5053 | wp=(ep(1)+ep(i+1))*ey(i) |
| 5054 | wm=(ep(1)-ep(i+1))/ey(i) |
| 5055 | ep(1)=.5*(wp+wm) |
| 5056 | ep(i+1)=.5*(wp-wm) |
| 5057 | endif |
| 5058 | enddo |
| 5059 | endif |
| 5060 | return |
| 5061 | end |
| 5062 | |
| 5063 | c------------------------------------------------------------------------ |
| 5064 | double precision function psuds(q,m) |
| 5065 | c----------------------------------------------------------------------- |
| 5066 | c psuds - spacelike sudakov formfactor |
| 5067 | c q - maximal value of the effective momentum, |
| 5068 | c m - type of parton (0 - g, 1,2, etc. - q) |
| 5069 | c----------------------------------------------------------------------- |
| 5070 | dimension wi(3) |
| 5071 | common /psar15/ sudx(40,2) |
| 5072 | include 'epos.incsem' |
| 5073 | double precision dps,qlm,ffacs,qlm0,qlmi |
| 5074 | |
| 5075 | j=min(iabs(m),1)+1 |
| 5076 | |
| 5077 | if(q.gt.q2ini)then |
| 5078 | qli=log(q/q2min)*2.+1. |
| 5079 | i=int(qli) |
| 5080 | if(i.lt.1)i=1 |
| 5081 | if(i.gt.38)i=38 |
| 5082 | wi(2)=qli-i |
| 5083 | wi(3)=wi(2)*(wi(2)-1.)*.5 |
| 5084 | wi(1)=1.-wi(2)+wi(3) |
| 5085 | wi(2)=wi(2)-2.*wi(3) |
| 5086 | dps=0.d0 |
| 5087 | do i1=1,3 |
| 5088 | dps=dps+dble(sudx(i+i1-1,j)*wi(i1)) |
| 5089 | enddo |
| 5090 | |
| 5091 | qlm0=dble(log(q2ini/qcdlam)) |
| 5092 | qlm=dble(log(q/qcdlam)) |
| 5093 | qlmi=qlm-qlm0 !=log(q/q2ini) |
| 5094 | psuds=(qlm*log(qlm/qlm0)-qlmi) |
| 5095 | |
| 5096 | ffacs=(11.d0-dble(naflav)/1.5d0)/12.d0 |
| 5097 | if(j.eq.1)then |
| 5098 | psuds=(psuds-ffacs*log(qlm/qlm0) |
| 5099 | * +dps*(1.d0-dble(q2ini/q)))/ffacs |
| 5100 | else |
| 5101 | psuds=(psuds-log(qlm/qlm0)*.75d0 |
| 5102 | * +dps*(1.d0-dble(q2ini/q)))*4.d0/9.d0/ffacs |
| 5103 | endif |
| 5104 | psuds=exp(-psuds) |
| 5105 | else |
| 5106 | psuds=1.d0 |
| 5107 | endif |
| 5108 | return |
| 5109 | end |
| 5110 | |
| 5111 | c------------------------------------------------------------------------ |
| 5112 | function psudx(q,j) |
| 5113 | c----------------------------------------------------------------------- |
| 5114 | c psudx - part of the bspacelike sudakov formfactor |
| 5115 | c q - maximal value of the effective momentum, |
| 5116 | c j - type of parton (1 - g, 2 - q) |
| 5117 | c----------------------------------------------------------------------- |
| 5118 | common /ar3/ x1(7),a1(7) |
| 5119 | include 'epos.incsem' |
| 5120 | |
| 5121 | psudx=0. |
| 5122 | |
| 5123 | do i=1,7 |
| 5124 | do m=1,2 |
| 5125 | qt=.5*(q2ini+q-x1(i)*(2.*m-3.)*(q2ini-q)) |
| 5126 | if(j.eq.1)then |
| 5127 | zm=1.-qt/q |
| 5128 | dps=((11.-naflav/1.5)/12.-zm**2*(1.-naflav/12.)+ |
| 5129 | * (zm**3/3.-zm**4/4.)*(1.-naflav/3.))*q/qt |
| 5130 | else |
| 5131 | dps=(1.-qt/q/4.) |
| 5132 | endif |
| 5133 | psudx=psudx+a1(i)*dps/log(qt/qcdlam) |
| 5134 | enddo |
| 5135 | enddo |
| 5136 | psudx=psudx*.5 |
| 5137 | return |
| 5138 | end |
| 5139 | |
| 5140 | c------------------------------------------------------------------------ |
| 5141 | double precision function psutz(s,a,b) |
| 5142 | c----------------------------------------------------------------------- |
| 5143 | c psutz - kinematical function for two particle decay - light cone momen |
| 5144 | c share for the particle of mass squared a, |
| 5145 | c b - partner's mass squared, |
| 5146 | c s - two particle invariant mass |
| 5147 | c----------------------------------------------------------------------- |
| 5148 | double precision a1,b1,s1,x,dx,s,a,b |
| 5149 | a1=dsqrt(a) |
| 5150 | b1=dsqrt(b) |
| 5151 | s1=dsqrt(s) |
| 5152 | x=(1.d0+(a1-b1)*(a1+b1)/s)/2.d0 |
| 5153 | dx=(x-a1/s1)*(x+a1/s1) |
| 5154 | c x=.5*(1.+(a-b)/s) |
| 5155 | c dx=(x*x-a/s) |
| 5156 | if(dx.gt.0.d0)then |
| 5157 | x=x+dsqrt(dx) |
| 5158 | else |
| 5159 | x=a1/s1 |
| 5160 | endif |
| 5161 | psutz=min(0.999999999d0,x) |
| 5162 | return |
| 5163 | end |
| 5164 | |
| 5165 | c------------------------------------------------------------------------ |
| 5166 | block data ptdata |
| 5167 | c----------------------------------------------------------------------- |
| 5168 | c constants for numerical integration (gaussian weights) |
| 5169 | c----------------------------------------------------------------------- |
| 5170 | common /ar3/ x1(7),a1(7) |
| 5171 | common /ar4/ x4(2),a4(2) |
| 5172 | common /ar5/ x5(2),a5(2) |
| 5173 | common /ar8/ x2(4),a2 |
| 5174 | common /ar9/ x9(3),a9(3) |
| 5175 | |
| 5176 | data x1/.9862838,.9284349,.8272013,.6872929,.5152486, |
| 5177 | *.3191124,.1080549/ |
| 5178 | data a1/.03511946,.08015809,.1215186,.1572032, |
| 5179 | *.1855384,.2051985,.2152639/ |
| 5180 | data x2/.00960736,.0842652,.222215,.402455/ |
| 5181 | data a2/.392699/ |
| 5182 | data x4/ 0.339981,0.861136/ |
| 5183 | data a4/ 0.652145,0.347855/ |
| 5184 | data x5/.585786,3.41421/ |
| 5185 | data a5/.853553,.146447/ |
| 5186 | data x9/.93247,.661209,.238619/ |
| 5187 | data a9/.171324,.360762,.467914/ |
| 5188 | end |
| 5189 | |
| 5190 | c------------------------------------------------------------------------ |
| 5191 | subroutine strdo1(x,scale,upv,dnv,sea,str,chm,gl) |
| 5192 | c------------------------------------------------------------------------ |
| 5193 | c :::::::::::: duke owens set 1 :::::::::::::::::::::::::::: |
| 5194 | c------------------------------------------------------------------------ |
| 5195 | implicit double precision(a-h,o-z) |
| 5196 | double precision |
| 5197 | + f(5),a(6,5),b1(3,6,5) |
| 5198 | data q0,ql1/2.d0,.2d0/ |
| 5199 | data b1/3.d0,0.d0,0.d0,.419d0,.004383d0,-.007412d0, |
| 5200 | &3.46d0,.72432d0,-.065998d0,4.4d0,-4.8644d0,1.3274d0, |
| 5201 | &6*0.d0,1.d0, |
| 5202 | &0.d0,0.d0,.763d0,-.23696d0,.025836d0,4.d0,.62664d0,-.019163d0, |
| 5203 | &0.d0,-.42068d0,.032809d0,6*0.d0,1.265d0,-1.1323d0,.29268d0, |
| 5204 | &0.d0,-.37162d0,-.028977d0,8.05d0,1.5877d0,-.15291d0, |
| 5205 | &0.d0,6.3059d0,-.27342d0,0.d0,-10.543d0,-3.1674d0, |
| 5206 | &0.d0,14.698d0,9.798d0,0.d0,.13479d0,-.074693d0, |
| 5207 | &-.0355d0,-.22237d0,-.057685d0,6.3494d0,3.2649d0,-.90945d0, |
| 5208 | &0.d0,-3.0331d0,1.5042d0,0.d0,17.431d0,-11.255d0, |
| 5209 | &0.d0,-17.861d0,15.571d0,1.564d0,-1.7112d0,.63751d0, |
| 5210 | &0.d0,-.94892d0,.32505d0,6.d0,1.4345d0,-1.0485d0, |
| 5211 | &9.d0,-7.1858d0,.25494d0,0.d0,-16.457d0,10.947d0, |
| 5212 | &0.d0,15.261d0,-10.085d0/ |
| 5213 | wn=1.d0 |
| 5214 | s= log( log( max(q0,scale)/ql1)/ log(q0/ql1)) |
| 5215 | do 10 i=1,5 |
| 5216 | do 10 j=1,6 |
| 5217 | 10 a(j,i)=b1(1,j,i)+s*(b1(2,j,i)+s*b1(3,j,i)) |
| 5218 | do 40 i=1,5 |
| 5219 | 40 f(i)=a(1,i)*x**a(2,i)*(wn-x)**a(3,i)*(wn+x* |
| 5220 | & (a(4,i)+x*(a(5,i)+x*a(6,i)))) |
| 5221 | do 50 i=1,2 |
| 5222 | aa=wn+a(2,i)+a(3,i) |
| 5223 | 50 f(i)=f(i)*utgam2(aa)/((wn+a(2,i)*a(4,i)/aa) |
| 5224 | &*utgam2(a(2,i))*utgam2(wn+a(3,i))) |
| 5225 | upv=f(1)-f(2) |
| 5226 | dnv=f(2) |
| 5227 | sea=f(3)/6.d0 |
| 5228 | str=sea |
| 5229 | chm=f(4) |
| 5230 | gl =f(5) |
| 5231 | return |
| 5232 | end |
| 5233 | |
| 5234 | |
| 5235 | |
| 5236 | c------------------------------------------------------------------------ |
| 5237 | function fzeroGluZZ(z,k) ! former psftild |
| 5238 | c----------------------------------------------------------------------- |
| 5239 | c |
| 5240 | c fzeroGluZZComplete = fzeroGluZZ * z^(-1-dels) * gamsoft * gamhad |
| 5241 | c |
| 5242 | c A = 8*pi*s0*gampar*gamtilde |
| 5243 | c integration over semihard pomeron light cone momentum share xp==u |
| 5244 | c |
| 5245 | c fzeroGluZZ = (1-glusea) * engy^epszero |
| 5246 | c * int(du) u^(epszero-alppar+dels) (1-u)^alplea * (1-z/u)**betpom |
| 5247 | c |
| 5248 | c z - light cone x of the gluon, |
| 5249 | c k - hadron class |
| 5250 | c----------------------------------------------------------------------- |
| 5251 | double precision xpmin,xp |
| 5252 | include 'epos.inc' |
| 5253 | common /ar3/ x1(7),a1(7) |
| 5254 | include 'epos.incsem' |
| 5255 | |
| 5256 | fzeroGluZZ=0. |
| 5257 | xpmin=z |
| 5258 | xpmin=xpmin**(1.-alppar+dels+epszero) |
| 5259 | do i=1,7 |
| 5260 | do m=1,2 |
| 5261 | xp=(.5*(1.+xpmin+(2*m-3)*x1(i)*(1.-xpmin)))**(1./ |
| 5262 | * (1.-alppar+dels+epszero)) |
| 5263 | fzeroGluZZ=fzeroGluZZ+a1(i)*(1.-xp)**alplea(k)*(1.-z/xp)**betpom |
| 5264 | enddo |
| 5265 | enddo |
| 5266 | fzeroGluZZ= |
| 5267 | * fzeroGluZZ*.5*(1.-xpmin)/(1.-alppar+dels+epszero) |
| 5268 | * *(1.-glusea) *engy**epszero |
| 5269 | return |
| 5270 | end |
| 5271 | |
| 5272 | c------------------------------------------------------------------------ |
| 5273 | function fzeroSeaZZ(z,k) ! former psftile |
| 5274 | c----------------------------------------------------------------------- |
| 5275 | c |
| 5276 | c fzeroSeaZZComplete = fzeroSeaZZ * z^(-1-dels) * gamsoft * gamhad |
| 5277 | c |
| 5278 | c gamsoft = 8*pi*s0*gampar*gamtilde |
| 5279 | c integration over semihard pomeron light cone momentum share xp==u |
| 5280 | c |
| 5281 | c fzeroSeaZZ = glusea * engy^epszero |
| 5282 | c * int(du) u^(epszero-alppar+dels) (1-u)^alplea * EsoftQZero(z/u) |
| 5283 | c |
| 5284 | c z - light cone x of the quark, |
| 5285 | c k - hadron class |
| 5286 | c----------------------------------------------------------------------- |
| 5287 | double precision xpmin,xp |
| 5288 | common /ar3/ x1(7),a1(7) |
| 5289 | include 'epos.inc' |
| 5290 | include 'epos.incsem' |
| 5291 | |
| 5292 | fzeroSeaZZ=0. |
| 5293 | xpmin=z |
| 5294 | xpmin=xpmin**(1.-alppar+dels+epszero) |
| 5295 | do i=1,7 |
| 5296 | do m=1,2 |
| 5297 | xp=(.5*(1.+xpmin+(2*m-3)*x1(i)*(1.-xpmin)))**(1./ |
| 5298 | * (1.-alppar+dels+epszero)) |
| 5299 | zz=z/xp |
| 5300 | fzeroSeaZZ=fzeroSeaZZ+a1(i)*(1.-xp)**alplea(k)*EsoftQZero(zz) |
| 5301 | enddo |
| 5302 | enddo |
| 5303 | fzeroSeaZZ=fzeroSeaZZ*.5*(1.-xpmin)/(1.-alppar+dels+epszero) |
| 5304 | * *glusea *engy**epszero |
| 5305 | return |
| 5306 | end |
| 5307 | |
| 5308 | |
| 5309 | c######################################################################## |
| 5310 | c######################################################################## |
| 5311 | subroutine psaini |
| 5312 | c######################################################################## |
| 5313 | c######################################################################## |
| 5314 | |
| 5315 | c----------------------------------------------------------------------- |
| 5316 | c common initialization procedure |
| 5317 | c if isetcs = 0, alpD, betD, etc ... in inirj are not used and xkappa=1 |
| 5318 | c if isetcs = 1, alpD, betD, etc ... in inirj are not used but xkappa.ne.1 |
| 5319 | c if isetcs = 2, alpD, betD, xkappa, etc ... in inirj are used and |
| 5320 | c cross section from calculation in inics are read. |
| 5321 | c if epos.inics doesn't exist, it produces only the calculated part of it. |
| 5322 | c if isetcs = 3, alpD, betD, xkappa, etc ... in inirj are used and |
| 5323 | c cross section from simulation in inics are read. |
| 5324 | c if epos.inics doesn't exist, it produces the calculated AND the |
| 5325 | c simulated part of it. |
| 5326 | c----------------------------------------------------------------------- |
| 5327 | include 'epos.inc' |
| 5328 | include 'epos.incpar' |
| 5329 | include 'epos.incsem' |
| 5330 | logical lcalc!,lcalc2 |
| 5331 | c double precision om5p,xh,yh,v3pom(4),om2p |
| 5332 | dimension gamhad0(nclha),r2had0(nclha),chad0(nclha) |
| 5333 | *,alplea0(nclha),asect1(7,4,7),asect2(7,4,7),asect3(7,7,7) |
| 5334 | *,asect4(7,7,7)!,cgam(idxD) |
| 5335 | common /psar2/ edmax,epmax |
| 5336 | common /psar4/ fhgg(11,10,8),fhqg(11,10,80) |
| 5337 | *,fhgq(11,10,80),fhqq(11,10,80),fhgg0(11,10),fhgg1(11,10,4) |
| 5338 | *,fhqg1(11,10,40),fhgg01(11),fhgg02(11),fhgg11(11,4) |
| 5339 | *,fhgg12(11,4),fhqg11(11,10,4),fhqg12(11,10,4) |
| 5340 | *,ftoint(11,14,2,2,3) |
| 5341 | common /psar7/ delx,alam3p,gam3p |
| 5342 | common /psar9/ alpr |
| 5343 | common /psar15/ sudx(40,2) |
| 5344 | common /psar19/ cstot(20,20,240) |
| 5345 | common /psar20/ csord(20,20,240) |
| 5346 | common /psar21/ csbor(20,160,2) |
| 5347 | common /psar22/ cstotzero(20,4,2),csborzer(20,4,2) |
| 5348 | common /psar23/ cschar(20,20,2) |
| 5349 | common /psar25/ csdsi(21,21,104) |
| 5350 | common /psar27/ csds(21,26,4),csdt(21,26,2),csdr(21,26,2) |
| 5351 | common /psar33/ asect(7,4,7),asectn(7,7,7) |
| 5352 | common /psar34/ rrr,rrrm |
| 5353 | common /psar35/ anorm,anormp |
| 5354 | common /psar41/ rrrp,rrrmp |
| 5355 | common /psar36/ alvc |
| 5356 | common /psar37/ coefom1,coefom2 |
| 5357 | common /psar38/ vfro(11,14,3,2) |
| 5358 | common /psar39/ vnorm(11,14,3,2,2) |
| 5359 | c$$$ common /psar40/ coefxu1(idxD,nclha,10) |
| 5360 | c$$$ *,coefxu2(idxD,idxD,nclha,10),coefxc2(idxD,idxD,nclha,10) |
| 5361 | common /ar3/ x1(7),a1(7) |
| 5362 | common /testj/ ajeth(4),ajete(5),ajet0(7) |
| 5363 | parameter(nbkbin=40) |
| 5364 | common /kfitd/ xkappafit(nclegy,nclha,nclha,nbkbin),xkappa,bkbin |
| 5365 | common/geom/rmproj,rmtarg,bmax,bkmx |
| 5366 | character textini*38 |
| 5367 | external ptfau,ptfauAA |
| 5368 | |
| 5369 | |
| 5370 | call utpri('psaini',ish,ishini,4) |
| 5371 | |
| 5372 | do i=1,4 |
| 5373 | ajeth(i)=0. |
| 5374 | enddo |
| 5375 | do i=1,5 |
| 5376 | ajete(i)=0. |
| 5377 | ajet0(i)=0. |
| 5378 | enddo |
| 5379 | ajet0(6)=0. |
| 5380 | ajet0(7)=0. |
| 5381 | |
| 5382 | |
| 5383 | if(isetcs.le.1)then !for Kfit |
| 5384 | bkbin=0.3 |
| 5385 | else |
| 5386 | bkbin=0.1 |
| 5387 | endif |
| 5388 | xkappa=1. |
| 5389 | |
| 5390 | edmax=edmaxi !1.e12 defined in epos-bas |
| 5391 | epmax=epmaxi !1.e12 defined in epos-bas |
| 5392 | |
| 5393 | c fix enhanced diagrams at minimum energy = 2.5 |
| 5394 | delx=1.5 !sqrt(egymin*egymin/exp(1.)) |
| 5395 | alam3p=.6 |
| 5396 | gam3p=.1 |
| 5397 | |
| 5398 | |
| 5399 | |
| 5400 | c interface to 'bas' |
| 5401 | c ---------------- |
| 5402 | |
| 5403 | dels=alppom-1. |
| 5404 | alpqua=(alppar+1.)/2. |
| 5405 | if(abs(alpqua).lt.1.e-6)call utstop('alpar should not be -1 !&') |
| 5406 | alpr=-2.+alpqua !x-exponent for remnant mass |
| 5407 | |
| 5408 | c omega coeffs |
| 5409 | c ---------------- |
| 5410 | coefom0=utgam1(1.+dels-alppar)*utgam1(1.+alplea(iclpro)) |
| 5411 | */utgam1(2.+alplea(iclpro)+dels-alppar) |
| 5412 | **utgam1(1.+dels-alppar)*utgam1(1.+alplea(icltar)) |
| 5413 | */utgam1(2.+alplea(icltar)+dels-alppar) |
| 5414 | coefom1=1.-utgam1(1.+dels-alppar)**2*utgam1(1.+alplea(iclpro)) |
| 5415 | */utgam1(1.+alplea(iclpro)+2.*(1.+dels-alppar)) |
| 5416 | **utgam1(1.+dels-alppar)**2*utgam1(1.+alplea(icltar)) |
| 5417 | */utgam1(1.+alplea(icltar)+2.*(1.+dels-alppar))/coefom0**2 |
| 5418 | coefom2=3.*coefom1-1. |
| 5419 | *+utgam1(1.+dels-alppar)**3*utgam1(1.+alplea(iclpro)) |
| 5420 | */utgam1(1.+alplea(iclpro)+3.*(1.+dels-alppar)) |
| 5421 | **utgam1(1.+dels-alppar)**3*utgam1(1.+alplea(icltar)) |
| 5422 | */utgam1(1.+alplea(icltar)+3.*(1.+dels-alppar))/coefom0**3 |
| 5423 | if(ish.ge.4)write(ifch,*)'coefom',coefom0,coefom1,coefom2,delx |
| 5424 | |
| 5425 | c soft pomeron: abbreviations |
| 5426 | c--------------------------------------- |
| 5427 | if(iappl.eq.1.or.iappl.eq.8.or.iappl.eq.9)then |
| 5428 | |
| 5429 | |
| 5430 | c--------------------------------------- |
| 5431 | c auxiliary constants: |
| 5432 | c--------------------------------------- |
| 5433 | stmass=.05 !string mass cutoff |
| 5434 | |
| 5435 | c--------------------------------------- |
| 5436 | c parton density normalization |
| 5437 | sq=log(log(q2min/.232**2)/log(.23/.232**2)) |
| 5438 | du=2.997+.753*sq-.076*sq*sq |
| 5439 | qnorm=0. |
| 5440 | do i=1,7 |
| 5441 | do m=1,2 |
| 5442 | xx=.5+x1(i)*(m-1.5) |
| 5443 | xxq=1.-xx**(1./(1.+du)) |
| 5444 | qnorm=qnorm+a1(i)*(psdfh4(xxq,q2min,0.,2,1)+ |
| 5445 | * psdfh4(xxq,q2min,0.,2,2))/(1.-xxq)**du |
| 5446 | enddo |
| 5447 | enddo |
| 5448 | qnorm=qnorm*.5/(1.+du) |
| 5449 | qnormp=qnorm |
| 5450 | ckkkkk----------------------------- |
| 5451 | c rr=(1.-qnorm)/4./pi/gamhad(2) |
| 5452 | c * *utgam1(2.+betpom-dels)/utgam1(1.-dels) |
| 5453 | c * /utgam1(1.+betpom)/utgam1(1.+alplea(2))/ |
| 5454 | c * utgam1(2.-alppar)*utgam1(3.+alplea(2)-alppar) |
| 5455 | c ffrr=(1.-qnorm)/4./pi/gamhad(2) |
| 5456 | c * *utgam1(2.+betpom-dels)/utgam1(1.-dels) |
| 5457 | c * /utgam1(1.+betpom) |
| 5458 | c write(6,*)'===========',ffrr |
| 5459 | ffrr=gamtil |
| 5460 | rr=ffrr |
| 5461 | * /utgam1(1.+alplea(2))/ |
| 5462 | * utgam1(2.-alppar)*utgam1(3.+alplea(2)-alppar) |
| 5463 | gamsoft=rr*4.*pi |
| 5464 | ckkkkkkk------------------------------- |
| 5465 | if(ish.ge.4)write (ifch,*)'rr,qnorm',rr,qnorm |
| 5466 | |
| 5467 | |
| 5468 | sq=log(log(q2min/.232**2)/log(.25/.232**2)) |
| 5469 | dpi=.367+.563*sq |
| 5470 | qnorm=0. |
| 5471 | do i=1,7 |
| 5472 | do m=1,2 |
| 5473 | xx=.5+x1(i)*(m-1.5) |
| 5474 | xxq=1.-xx**(1./(1.+dpi)) |
| 5475 | qnorm=qnorm+a1(i)*(psdfh4(xxq,q2min,0.,1,1)+ |
| 5476 | * psdfh4(xxq,q2min,0.,1,2))/(1.-xxq)**dpi |
| 5477 | enddo |
| 5478 | enddo |
| 5479 | qnorm=qnorm*.5/(1.+dpi) |
| 5480 | cftmp=1./(1.-qnormp)*(1.-qnorm) |
| 5481 | * *utgam1(alplea(2)+1.)/utgam1(alplea(2)+3.-alppar) |
| 5482 | * /utgam1(alplea(1)+1.)*utgam1(alplea(1)+3.-alppar) |
| 5483 | gamhad(1)=gamhad(2)*cftmp |
| 5484 | if(gamhadsi(1).lt.0.)then |
| 5485 | gamhads(1)=gamhad(1) |
| 5486 | else |
| 5487 | gamhads(1)=gamhadsi(1) |
| 5488 | endif |
| 5489 | if(ish.ge.4) |
| 5490 | * write (ifch,*)'gamhad(1),gamhads(1)',gamhad(1),gamhads(1) |
| 5491 | |
| 5492 | if(gamhadsi(2).lt.0.)then |
| 5493 | gamhads(2)=gamhad(2) |
| 5494 | else |
| 5495 | gamhads(2)=gamhadsi(2) |
| 5496 | endif |
| 5497 | if(ish.ge.4) |
| 5498 | * write (ifch,*)'gamhad(2),gamhads(2)',gamhad(2),gamhads(2) |
| 5499 | |
| 5500 | qnorm=0. |
| 5501 | do i=1,7 |
| 5502 | do m=1,2 |
| 5503 | xx=.5+x1(i)*(m-1.5) |
| 5504 | xxq=1.-xx**(1./(1.+dpi)) |
| 5505 | qnorm=qnorm+a1(i)*(psdfh4(xxq,q2min,0.,1,1)+ |
| 5506 | * psdfh4(xxq,q2min,0.,1,2))/(1.-xxq)**dpi |
| 5507 | enddo |
| 5508 | enddo |
| 5509 | qnorm=qnorm*.5/(1.+dpi) |
| 5510 | cftmp=1./(1.-qnormp)*(1.-qnorm) |
| 5511 | * *utgam1(alplea(2)+1.)/utgam1(alplea(2)+3.-alppar) |
| 5512 | * /utgam1(alplea(3)+1.)*utgam1(alplea(3)+3.-alppar) |
| 5513 | gamhad(3)=gamhad(2)*cftmp |
| 5514 | if(gamhadsi(3).lt.0.)then |
| 5515 | gamhads(3)=gamhad(3) |
| 5516 | else |
| 5517 | gamhads(3)=gamhadsi(3) |
| 5518 | endif |
| 5519 | if(ish.ge.4) |
| 5520 | * write (ifch,*)'gamhad(3),gamhads(3)',gamhad(3),gamhads(3) |
| 5521 | |
| 5522 | quamas=.35 |
| 5523 | gamhad(4)=gamhad(1)*(quamas/qcmass)**2 |
| 5524 | if(gamhadsi(4).lt.0.)then |
| 5525 | gamhads(4)=gamhad(4) |
| 5526 | else |
| 5527 | gamhads(4)=gamhadsi(4) |
| 5528 | endif |
| 5529 | if(ish.ge.4) |
| 5530 | * write (ifch,*)'gamhad(4),gamhads(4)',gamhad(4),gamhads(4) |
| 5531 | gnorm=0. |
| 5532 | do i=1,7 |
| 5533 | do m=1,2 |
| 5534 | xx=.5+x1(i)*(m-1.5) |
| 5535 | xxg=xx**(1./(1.-dels)) |
| 5536 | gnorm=gnorm+a1(i)*(fzeroGluZZ(xxg,4)+fzeroSeaZZ(xxg,4)) |
| 5537 | enddo |
| 5538 | enddo |
| 5539 | gnorm=gnorm/(1.-dels)*2.*pi*gamhad(4)*rr |
| 5540 | alvc=6./(1.-gnorm)-4. |
| 5541 | if(ish.ge.4) write (ifch,*)'rr,qnorm,gnorm,alvc', |
| 5542 | * rr,qnorm,gnorm,alvc |
| 5543 | |
| 5544 | c write (*,*)'rr-c,qnorm,gnorm,alvc',rr,qnorm,gnorm,alvc |
| 5545 | endif |
| 5546 | |
| 5547 | c----------------------------------------------- |
| 5548 | c tabulation of inclusive jet cross sections |
| 5549 | c-------------------------------------------------- |
| 5550 | |
| 5551 | do i=1,40 |
| 5552 | qi=q2min*exp(.5*(i-1)) |
| 5553 | sudx(i,1)=psudx(qi,1) |
| 5554 | sudx(i,2)=psudx(qi,2) |
| 5555 | enddo |
| 5556 | if(ish.ge.4)write(ifch,*)'bare cross sections ...' |
| 5557 | |
| 5558 | call psaevc |
| 5559 | |
| 5560 | ccc call MakeCSTable |
| 5561 | |
| 5562 | inquire(file=fnii(1:nfnii),exist=lcalc) |
| 5563 | if(lcalc)then |
| 5564 | if(inicnt.eq.1)then |
| 5565 | write(ifmt,'(3a)')'read from ',fnii(1:nfnii),' ...' |
| 5566 | open(1,file=fnii(1:nfnii),status='old') |
| 5567 | read (1,*)qcdlam0,q2min0,q2ini0,naflav0,epmax0,pt2cut0 |
| 5568 | if(qcdlam0.ne.qcdlam)write(ifmt,'(a)')'initl: wrong qcdlam' |
| 5569 | if(q2min0 .ne.q2min )write(ifmt,'(a)')'initl: wrong q2min' |
| 5570 | if(q2ini0 .ne.q2ini )write(ifmt,'(a)')'initl: wrong q2ini' |
| 5571 | if(naflav0.ne.naflav)write(ifmt,'(a)')'initl: wrong naflav' |
| 5572 | if(epmax0 .ne.epmax )write(ifmt,'(a)')'initl: wrong epmax' |
| 5573 | if(pt2cut0 .ne.pt2cut )write(ifmt,'(a)')'initl: wrong pt2cut' |
| 5574 | if(qcdlam0.ne.qcdlam.or.q2min0 .ne.q2min .or.q2ini0 .ne.q2ini |
| 5575 | * .or.naflav0.ne.naflav.or.epmax0 .ne.epmax.or. pt2cut.ne.pt2cut0) |
| 5576 | * then |
| 5577 | write(ifmt,'(//a//)')' initl has to be reinitialized!!!' |
| 5578 | stop |
| 5579 | endif |
| 5580 | read (1,*)csbor,csord,cstot,cstotzero,csborzer |
| 5581 | close(1) |
| 5582 | endif |
| 5583 | |
| 5584 | goto 1 |
| 5585 | endif |
| 5586 | |
| 5587 | write(ifmt,'(a)')'initl does not exist -> calculate tables ...' |
| 5588 | |
| 5589 | write (*,*)'Born xsection csbor' |
| 5590 | spmin=4.*q2min |
| 5591 | spminc=4.*q2min+qcmass**2 |
| 5592 | do m=1,4 !parton type at upper end of the ladder (1...4 - g,u,d,c) |
| 5593 | do k=1,20 |
| 5594 | if(m.ne.4)then |
| 5595 | sk=spmin*(epmax/2./spmin)**((k-1)/19.) |
| 5596 | p1=sk |
| 5597 | else |
| 5598 | sk=spminc*(epmax/2./spminc)**((k-1)/19.) |
| 5599 | p1=sk/(1.+qcmass**2/sk) |
| 5600 | endif |
| 5601 | qmax=p1/4. |
| 5602 | do i=1,20 |
| 5603 | qq=q2min*(qmax/q2min)**((i-1)/19.) |
| 5604 | do l=1,2 !parton type at lower end of the ladder |
| 5605 | k1=k+20*(m-1)+80*(l-1) |
| 5606 | m1=m-1 |
| 5607 | if(m.eq.3.and.l.eq.1)then !dd~ |
| 5608 | l1=-m1 |
| 5609 | else !du |
| 5610 | l1=l-1 |
| 5611 | endif !born cr.-sect. |
| 5612 | csbor(i,k1,1)=log(max(1.e-30,psborn(qq,qq,qq,sk,m1,l1,0,0))) |
| 5613 | if(m.ne.4)then |
| 5614 | csbor(i,k1,2)=log(max(1.e-30,psborn(4.*qq,qq,qq,sk,m1,l1,1,0))) |
| 5615 | endif |
| 5616 | enddo |
| 5617 | enddo |
| 5618 | enddo |
| 5619 | enddo |
| 5620 | |
| 5621 | write (*,*)'ordered jet xsection csord' |
| 5622 | do m=1,4 !parton type at upper end of the ladder |
| 5623 | do k=1,20 |
| 5624 | write (*,*)' m=',m,'/4 k=',k,'/20' |
| 5625 | if(m.ne.4)then |
| 5626 | sk=spmin*(epmax/2./spmin)**((k-1)/19.) !c.m. energy squared for the hard |
| 5627 | p1=sk |
| 5628 | else |
| 5629 | sk=spminc*(epmax/2./spminc)**((k-1)/19.) |
| 5630 | p1=sk/(1.+qcmass**2/sk) |
| 5631 | endif |
| 5632 | qmax=p1/4. |
| 5633 | tmax=p1/2. |
| 5634 | do i=1,20 !cross-sections initialization |
| 5635 | qi=q2min*(qmax/q2min)**((i-1)/19.) |
| 5636 | do j=1,20 |
| 5637 | qq=qi*(qmax/qi)**((j-1)/19.) |
| 5638 | if(p1.gt.4.*qq)then |
| 5639 | tmin=2.*qq/(1.+sqrt(1.-4.*qq/p1)) |
| 5640 | else |
| 5641 | tmin=2.*qq |
| 5642 | endif |
| 5643 | do l=1,2 !parton type at lower end of the ladder |
| 5644 | m1=m-1 |
| 5645 | if(m.eq.3.and.l.eq.1)then |
| 5646 | l1=-m1 |
| 5647 | else |
| 5648 | l1=l-1 |
| 5649 | endif |
| 5650 | if(m.ne.4)then |
| 5651 | k1=k+20*(m-1)+60*(l-1) |
| 5652 | if(k.eq.1.or.i.eq.20.or.j.eq.20)then |
| 5653 | csord(i,j,k1)=log(max(1.e-30,psborn(qi,qq,qq,sk,m1,l1,0,0))) |
| 5654 | csord(i,j,k1+120)= |
| 5655 | * log(max(1.e-30,psborn(4.*qq,qi,qq,sk,l1,m1,1,0))) |
| 5656 | else |
| 5657 | csord(i,j,k1)=log(psjet1(qi,qq,qq,sk,m1,l1,0) |
| 5658 | * /(1./tmin-1./tmax)+psborn(qi,qq,qq,sk,m1,l1,0,0)) |
| 5659 | csord(i,j,k1+120)=log(psjet1(qi,4.*qq,qq,sk,m1,l1,2) |
| 5660 | * /(1./tmin-1./tmax)+psborn(4.*qq,qi,qq,sk,l1,m1,1,0)) |
| 5661 | |
| 5662 | endif |
| 5663 | elseif(j.eq.1)then |
| 5664 | if(k.eq.1.or.i.eq.20)then |
| 5665 | cschar(i,k,l)=log(max(1.e-30,psborn(q2min,qi,qq,sk,m1,l1,0,0))) |
| 5666 | else |
| 5667 | cschar(i,k,l)=log(psjet1(qi,q2min,qq,sk,l1,m1,0) |
| 5668 | * /(1./tmin-1./tmax)+psborn(q2min,qi,qq,sk,m1,l1,0,0)) |
| 5669 | endif |
| 5670 | endif |
| 5671 | enddo |
| 5672 | enddo |
| 5673 | enddo |
| 5674 | enddo |
| 5675 | enddo |
| 5676 | |
| 5677 | write (ifmt,*)'tests:' |
| 5678 | write (ifmt,'(a,a)')' n-1 sk qi qj qq ' |
| 5679 | * ,' born born-i ord ord-i ' |
| 5680 | do k=1,7 |
| 5681 | sk=spmin*(epmax/2./spmin)**((k-1)/19.) |
| 5682 | if(k.ge.5)sk=spmin*1.5**(k-4) |
| 5683 | do n=1,2 |
| 5684 | if(n.eq.1)then |
| 5685 | qmax1=sk/4. |
| 5686 | qmax2=sk/4. |
| 5687 | elseif(n.eq.2)then |
| 5688 | qmax1=sk/4. |
| 5689 | qmax2=sk |
| 5690 | endif |
| 5691 | do i=1,3 |
| 5692 | qi=q2min*(qmax1/q2min)**((i-1)/3.) |
| 5693 | do j=1,3 |
| 5694 | qj=q2min*(qmax2/q2min)**((j-1)/3.) |
| 5695 | qqmax=sk/4. |
| 5696 | if(n.eq.1)then |
| 5697 | qqmin=max(qi,qj) |
| 5698 | else |
| 5699 | qqmin=max(qi,qj/4.) |
| 5700 | endif |
| 5701 | do lq=1,3 |
| 5702 | qq=qqmin*(qqmax/qqmin)**((lq-1)/3.) |
| 5703 | if(sk.gt.4.*qq)then |
| 5704 | tmin=2.*qq/(1.+sqrt(1.-4.*qq/sk)) |
| 5705 | else |
| 5706 | tmin=2.*qq |
| 5707 | endif |
| 5708 | tmax=sk/2. |
| 5709 | do m=1,1 !parton type at upper end of the ladder (1 |
| 5710 | do l=1,1 !parton type at lower end of the ladder (1 |
| 5711 | m1=m-1 |
| 5712 | if(m.eq.3.and.l.eq.1)then |
| 5713 | l1=-m1 |
| 5714 | else |
| 5715 | l1=l-1 |
| 5716 | endif |
| 5717 | a=psborn(qj,qi,qq,sk,l1,m1,n-1,0)*(1./tmin-1./tmax) |
| 5718 | b=psbint(qj,qi,qq,sk,l1,m1,n-1) |
| 5719 | c=psjet1(qi,qj,qq,sk,m1,l1,2*(n-1)) |
| 5720 | * +psborn(qj,qi,qq,sk,l1,m1,n-1,0)*(1./tmin-1./tmax) |
| 5721 | d=psjti1(qi,qj,qq,sk,m1,l1,n-1) |
| 5722 | write (ifmt,'(i3,4f9.1,3x,4f9.4)')n-1,sk,qi,qj,qq,a,b,c,d |
| 5723 | enddo |
| 5724 | enddo |
| 5725 | enddo |
| 5726 | enddo |
| 5727 | enddo |
| 5728 | enddo |
| 5729 | enddo |
| 5730 | |
| 5731 | write (*,*)'jet xsection cstot' |
| 5732 | do k=1,20 |
| 5733 | write (*,*)'k=',k,'/20' |
| 5734 | sk=spmin*(epmax/2./spmin)**((k-1)/19.) !c.m. energy squared for the hard |
| 5735 | qmax=sk/4. |
| 5736 | tmax=sk/2. |
| 5737 | do i=1,20 !cross-sections initialization |
| 5738 | do n=1,2 |
| 5739 | if(n.eq.1)then |
| 5740 | qi=q2min*(qmax/q2min)**((i-1)/19.) |
| 5741 | else |
| 5742 | qi=q2min*(4.*qmax/q2min)**((i-1)/19.) |
| 5743 | endif |
| 5744 | do j=1,20 |
| 5745 | if(n.eq.1)then |
| 5746 | qq=qi*(qmax/qi)**((j-1)/19.) |
| 5747 | else |
| 5748 | qq=max(q2min,qi/4.)*(qmax/max(q2min,qi/4.))** |
| 5749 | * ((j-1)/19.) |
| 5750 | endif |
| 5751 | if(sk.gt.4.*qq)then |
| 5752 | tmin=2.*qq/(1.+sqrt(1.-4.*qq/sk)) |
| 5753 | else |
| 5754 | tmin=2.*qq |
| 5755 | endif |
| 5756 | do m=1,3 !parton type at upper end of the ladder (1 |
| 5757 | do l=1,2 !parton type at lower end of the ladder (1 |
| 5758 | m1=m-1 |
| 5759 | if(m.eq.3.and.l.eq.1)then |
| 5760 | l1=-m1 |
| 5761 | else |
| 5762 | l1=l-1 |
| 5763 | endif |
| 5764 | k1=k+20*(m-1)+60*(l-1)+120*(n-1) |
| 5765 | if(k.eq.1.or.i.eq.20.or.j.eq.20)then |
| 5766 | cstot(i,j,k1)=log(max(1.e-30,psborn(qi,q2min,qq,sk,m1,l1,n-1,0))) |
| 5767 | else |
| 5768 | if(n.eq.1)then |
| 5769 | cstot(i,j,k1)=log((psjet(qi,q2min,qq,sk,m1,l1,0)+ |
| 5770 | * psjti1(qi,q2min,qq,sk,m1,l1,0)+ |
| 5771 | * psjti1(q2min,qi,qq,sk,l1,m1,0) |
| 5772 | * -psbint(qi,q2min,qq,sk,m1,l1,0))/(1./tmin-1./tmax)) |
| 5773 | else |
| 5774 | cstot(i,j,k1)=log((psjet(qi,q2min,qq,sk,m1,l1,1)+ |
| 5775 | * psjet1(qi,q2min,qq,sk,m1,l1,1)+ |
| 5776 | * psjti1(q2min,qi,qq,sk,l1,m1,1))/(1./tmin-1./tmax)) |
| 5777 | endif |
| 5778 | endif |
| 5779 | enddo |
| 5780 | enddo |
| 5781 | enddo |
| 5782 | enddo |
| 5783 | enddo |
| 5784 | enddo |
| 5785 | |
| 5786 | c total and born hard cross-sections logarithms for minimal cutoff |
| 5787 | c (q2min), interpolated in the psjti0 procedure |
| 5788 | 2 spmin=4.*q2min |
| 5789 | spminc=4.*q2min+qcmass**2 |
| 5790 | do m=1,4 |
| 5791 | do l=1,2 |
| 5792 | m1=m-1 |
| 5793 | if(m.eq.3.and.l.eq.1)then |
| 5794 | l1=-m1 |
| 5795 | else |
| 5796 | l1=l-1 |
| 5797 | endif |
| 5798 | do k=1,20 |
| 5799 | if(m.ne.4)then |
| 5800 | sk=spmin*(epmax/2./spmin)**((k-1)/19.) !c.m. energy squared for the hard |
| 5801 | p1=sk |
| 5802 | qq=q2min |
| 5803 | else |
| 5804 | sk=spminc*(epmax/2./spminc)**((k-1)/19.) |
| 5805 | p1=sk/(1.+qcmass**2/sk) |
| 5806 | qq=q2min |
| 5807 | endif |
| 5808 | if(p1.gt.4.*qq)then |
| 5809 | tmin=2.*qq/(1.+sqrt(1.-4.*qq/p1)) |
| 5810 | else |
| 5811 | tmin=2.*qq |
| 5812 | endif |
| 5813 | tmax=p1/2. |
| 5814 | |
| 5815 | k1=k+20*(m-1)+80*(l-1) |
| 5816 | csborzer(k,m,l) |
| 5817 | * =log(max(1.e-30,psborn(q2min,q2min,qq,sk,m1,l1,0,0))) |
| 5818 | if(k.eq.1)then |
| 5819 | cstotzero(k,m,l)=csborzer(k,m,l) |
| 5820 | elseif(m.ne.4)then |
| 5821 | cstotzero(k,m,l)=log(psjti(q2min,qq,sk,m1,l1,0)/ |
| 5822 | * (1./tmin-1./tmax)) |
| 5823 | else |
| 5824 | smins=2.5*q2min*(1.+sqrt(1.+4.*qcmass**2/q2min)) |
| 5825 | if(sk.le.smins)then |
| 5826 | cstotzero(k,m,l)=log(psjci(q2min,sk,l1)/(1./tmin-1./tmax)) |
| 5827 | else |
| 5828 | cstotzero(k,m,l)=log((psjci(q2min,sk,l1)+psjct(sk,l1)) |
| 5829 | * /(1./tmin-1./tmax)) |
| 5830 | endif |
| 5831 | endif |
| 5832 | enddo |
| 5833 | enddo |
| 5834 | enddo |
| 5835 | |
| 5836 | write(ifmt,'(a)')'write to initl ...' |
| 5837 | open(1,file=fnii(1:nfnii),status='unknown') |
| 5838 | write (1,*)qcdlam,q2min,q2ini,naflav,epmax,pt2cut |
| 5839 | write (1,*)csbor,csord,cstot,cstotzero,csborzer,cschar |
| 5840 | close(1) |
| 5841 | |
| 5842 | 1 continue |
| 5843 | |
| 5844 | if(iappl.ne.8)goto 3 |
| 5845 | if(ish.ge.3)write(ifch,*)'dis cross sections ...' |
| 5846 | inquire(file=fnid(1:nfnid),exist=lcalc) |
| 5847 | if(lcalc)then |
| 5848 | if(inicnt.eq.1)then |
| 5849 | write(ifmt,'(3a)')'read from ',fnid(1:nfnid),' ...' |
| 5850 | open(1,file=fnid(1:nfnid),status='old') |
| 5851 | read (1,*)qcdlam0,q2min0,q2ini0,naflav0,epmax0,edmax0 |
| 5852 | if(qcdlam0.ne.qcdlam)write(ifmt,'(a)')'inidi: wrong qcdlam' |
| 5853 | if(q2min0 .ne.q2min )write(ifmt,'(a)')'inidi: wrong q2min' |
| 5854 | if(q2ini0 .ne.q2ini )write(ifmt,'(a)')'inidi: wrong q2ini' |
| 5855 | if(naflav0.ne.naflav)write(ifmt,'(a)')'inidi: wrong naflav' |
| 5856 | if(epmax0 .ne.epmax )write(ifmt,'(a)')'inidi: wrong epmax' |
| 5857 | if(edmax0 .ne.edmax )write(ifmt,'(a)')'inidi: wrong edmax' |
| 5858 | if(qcdlam0.ne.qcdlam.or.q2min0 .ne.q2min.or.q2ini0 .ne.q2ini |
| 5859 | * .or.naflav0.ne.naflav.or.epmax0 .ne.epmax |
| 5860 | * .or.edmax0 .ne.edmax)then |
| 5861 | write(ifmt,'(//a//)')' inidi has to be reinitialized!!!' |
| 5862 | stop |
| 5863 | endif |
| 5864 | read (1,*)csdsi,csds,csdt,csdr |
| 5865 | close(1) |
| 5866 | endif |
| 5867 | goto 3 |
| 5868 | endif |
| 5869 | |
| 5870 | write(ifmt,'(a)')'inidi does not exist -> calculate tables ...' |
| 5871 | do j=1,21 |
| 5872 | qq=q2min*exp(.5*(j-1)) !photon virtuality |
| 5873 | |
| 5874 | do m=1,2 !parton type at the end of the ladder |
| 5875 | q2mass=qcmass**2 |
| 5876 | s2min=4.*max(q2mass,q2min)+qq |
| 5877 | if(m.eq.2)s2min=s2min/(1.-4.*q2ini/(s2min-qq)) |
| 5878 | do k=1,26 |
| 5879 | write (*,*)'sin,j,m,k',j,m,k |
| 5880 | sk=s2min*(edmax/s2min)**(.04*(k-1)) !c.m. energy squared |
| 5881 | if(k.eq.26)sk=1.01*sk |
| 5882 | qmin=q2min |
| 5883 | if(m.eq.1)then |
| 5884 | qmax=(sk-qq)/4. |
| 5885 | else |
| 5886 | qmax=(sk-qq+sqrt((sk-qq)**2-16.*sk*q2ini))/8. |
| 5887 | endif |
| 5888 | |
| 5889 | do i=1,21 !cross-sections calculation |
| 5890 | qi=qmin*(qmax/qmin)**((i-1)/20.) |
| 5891 | tmax=.5*sk |
| 5892 | qtq=4.*max(q2mass,qi)/(sk-qq) |
| 5893 | if(qtq.lt.1.)then |
| 5894 | tmin=.5*sk*qtq/(1.+sqrt(1.-qtq)) |
| 5895 | else |
| 5896 | tmin=.5*sk |
| 5897 | endif |
| 5898 | |
| 5899 | do ilong=1,2 |
| 5900 | k1=k+26*(m-1)+52*(ilong-1) |
| 5901 | if(m.eq.1)then |
| 5902 | if(tmax.gt.1.01*tmin)then |
| 5903 | sij=psds(qi,qq,sk,m-1,ilong-1) |
| 5904 | if(sij.lt.0.)write (*,*)'qi,qq,sk,m,long,sij', |
| 5905 | * qi,qq,sk,m,ilong,sij |
| 5906 | csdsi(i,j,k1)=log(max(0.,sij)/(1./tmin-1./tmax) |
| 5907 | * +psdbor(qi,qq,sk,ilong-1)) |
| 5908 | else |
| 5909 | csdsi(i,j,k1)= |
| 5910 | * log(max(1.e-25,psdbor(qi,qq,sk,ilong-1))) |
| 5911 | endif |
| 5912 | else |
| 5913 | csdsi(i,j,k1)=psds(qi,qq,sk,m-1,ilong-1) |
| 5914 | endif |
| 5915 | enddo |
| 5916 | enddo |
| 5917 | enddo |
| 5918 | enddo |
| 5919 | enddo |
| 5920 | |
| 5921 | 800 continue |
| 5922 | do j=1,21 |
| 5923 | qq=q2min*exp(.5*(j-1)) !photon virtuality |
| 5924 | s2min=max(4.*qq,16.*q2min) !pt2dis=qq |
| 5925 | do m=1,2 |
| 5926 | do k=1,26 |
| 5927 | do ilong=1,2 |
| 5928 | k1=k+26*(m-1)+52*(ilong-1) |
| 5929 | csds(j,k,m+2*(ilong-1))=csdsi(1,j,k1) |
| 5930 | enddo |
| 5931 | |
| 5932 | sk=(s2min+qq)*(edmax/(s2min+qq))**(.04*(k-1)) |
| 5933 | csdt(j,k,m)=psdres(qq,sk,s2min,m-1) |
| 5934 | csdr(j,k,m)=psdrga(qq,sk-qq,s2min,m-1) |
| 5935 | enddo |
| 5936 | enddo |
| 5937 | enddo |
| 5938 | |
| 5939 | write(ifmt,'(a)')'write to inidi ...' |
| 5940 | |
| 5941 | write(ifmt,'(a)')'write to inidi ...' |
| 5942 | open(1,file=fnid(1:nfnid),status='unknown') |
| 5943 | write (1,*)qcdlam,q2min,q2ini,naflav,epmax,edmax |
| 5944 | write (1,*)csdsi,csds,csdt,csdr |
| 5945 | close(1) |
| 5946 | 3 continue |
| 5947 | |
| 5948 | c--------------------------------------- |
| 5949 | c tabulation of semihard eikonals |
| 5950 | c--------------------------------------- |
| 5951 | |
| 5952 | !!!!!!!!! if(iappl.eq.1)then |
| 5953 | |
| 5954 | if(ish.ge.4)write(ifch,*)'semihard eikonals ...' |
| 5955 | 5 continue |
| 5956 | inquire(file=fnrj,exist=lcalc) |
| 5957 | if(lcalc)then |
| 5958 | if(inicnt.eq.1)then |
| 5959 | write(ifmt,'(3a)')'read from ',fnrj(1:nfnrj),' ...' |
| 5960 | open(1,file=fnrj(1:nfnrj),status='old') |
| 5961 | read (1,*)alpqua0,alplea0,alppom0,slopom0, |
| 5962 | * gamhad0,r2had0,chad0, |
| 5963 | * qcdlam0,q2min0,q2ini0,betpom0,glusea0,naflav0, |
| 5964 | * factk0,pt2cut0,gamtil0 |
| 5965 | if(alpqua0.ne.alpqua)write(ifmt,'(a,2f8.4)') |
| 5966 | * 'inirj: wrong alpqua',alpqua0,alpqua |
| 5967 | if(alppom0.ne.alppom)write(ifmt,'(a,2f8.4)') |
| 5968 | * 'inirj: wrong alppom',alppom0,alppom |
| 5969 | if(slopom0.ne.slopom)write(ifmt,'(a,2f8.4)') |
| 5970 | * 'inirj: wrong slopom',slopom0,slopom |
| 5971 | iii=2 |
| 5972 | if(gamhad0(iii).ne.gamhad(iii))write(ifmt,'(a,i1,a,2f8.4)') |
| 5973 | * 'inirj: wrong gamhad(',iii,')',gamhad0(iii),gamhad(iii) |
| 5974 | do iii=1,3 |
| 5975 | if(r2had0(iii) .ne.r2had(iii) )write(ifmt,'(a,i1,a,2f8.4)') |
| 5976 | * 'inirj: wrong r2had(',iii,')',r2had0(iii),r2had(iii) |
| 5977 | if(chad0(iii) .ne.chad(iii) )write(ifmt,'(a,i1,a,2f8.4)') |
| 5978 | * 'inirj: wrong chad(',iii,')',chad0(iii),chad(iii) |
| 5979 | if(alplea0(iii).ne.alplea0(iii))write(ifmt,'(a,i1,a,2f8.4)') |
| 5980 | * 'inirj: wrong alplea(',iii,')',alplea0(iii),alplea(iii) |
| 5981 | enddo |
| 5982 | if(qcdlam0.ne.qcdlam)write(ifmt,'(a,2f8.4)') |
| 5983 | * 'inirj: wrong qcdlam',qcdlam0,qcdlam |
| 5984 | if(q2min0 .ne.q2min )write(ifmt,'(a,2f8.4)') |
| 5985 | * 'inirj: wrong q2min',q2min0,q2min |
| 5986 | if(q2ini0 .ne.q2ini )write(ifmt,'(a,2f8.4)') |
| 5987 | * 'inirj: wrong q2ini',q2ini0,q2ini |
| 5988 | if(betpom0.ne.betpom)write(ifmt,'(a,2f8.4)') |
| 5989 | * 'inirj: wrong betpom',betpom0,betpom |
| 5990 | if(glusea0.ne.glusea)write(ifmt,'(a,2f8.4)') |
| 5991 | * 'inirj: wrong glusea',glusea0,glusea |
| 5992 | if(naflav0.ne.naflav)write(ifmt,'(a,2f8.4)') |
| 5993 | * 'inirj: wrong naflav',naflav0,naflav |
| 5994 | if(factk0 .ne.factk )write(ifmt,'(a,2f8.4)') |
| 5995 | * 'inirj: wrong factk', factk0,factk |
| 5996 | if(pt2cut0 .ne.pt2cut )write(ifmt,'(a,2f8.4)') |
| 5997 | * 'inirj: wrong pt2cut', pt2cut0,pt2cut |
| 5998 | if(gamtil0 .ne.gamtil )write(ifmt,'(a,2f8.4)') |
| 5999 | * 'inirj: wrong gamtil', gamtil0,gamtil |
| 6000 | if(alpqua0.ne.alpqua.or.alppom0.ne.alppom |
| 6001 | * .or.slopom0.ne.slopom.or.gamhad0(2).ne.gamhad(2) |
| 6002 | * .or.r2had0(1).ne.r2had(1).or.r2had0(2).ne.r2had(2) |
| 6003 | * .or.r2had0(3).ne.r2had(3) |
| 6004 | * .or.chad0(1).ne.chad(1).or.chad0(2).ne.chad(2) |
| 6005 | * .or.chad0(3).ne.chad(3) |
| 6006 | * .or.alplea0(1).ne.alplea(1).or.alplea0(2).ne.alplea(2) |
| 6007 | * .or.alplea0(3).ne.alplea(3) |
| 6008 | * .or.qcdlam0.ne.qcdlam.or.q2min0 .ne.q2min |
| 6009 | * .or.q2ini0 .ne.q2ini.or.gamtil0.ne.gamtil |
| 6010 | * .or.betpom0.ne.betpom.or.glusea0.ne.glusea.or.naflav0.ne.naflav |
| 6011 | * .or.factk0 .ne.factk .or.pt2cut0.ne.pt2cut)then |
| 6012 | write(ifmt,'(//a//)')' inirj has to be reinitialized!!!!' |
| 6013 | stop |
| 6014 | endif |
| 6015 | |
| 6016 | read(1,*)fhgg,fhqg,fhgq,fhqq,fhgg0,fhgg1,fhqg1 |
| 6017 | * ,fhgg01,fhgg02,fhgg11,fhgg12,fhqg11,fhqg12 |
| 6018 | * ,ftoint,vfro,vnorm,coefxu1,coefxu2,coefxc2 |
| 6019 | read(1,*)bkbin0,iclpro10,iclpro20,icltar10,icltar20,iclegy10 |
| 6020 | * ,iclegy20,egylow0,egymax0,iomega0,egyscr0,epscrw0,epscrp0 |
| 6021 | if(isetcs.gt.1)then |
| 6022 | textini=' ' |
| 6023 | if(iclpro10.ne.iclpro1)write(textini,'(a,2i8)') |
| 6024 | * 'inirj: wrong iclpro1 ',iclpro10,iclpro1 |
| 6025 | if(iclpro20.ne.iclpro2)write(textini,'(a,2i8)') |
| 6026 | * 'inirj: wrong iclpro2 ',iclpro20,iclpro2 |
| 6027 | if(icltar10.ne.icltar1)write(textini,'(a,2i8)') |
| 6028 | * 'inirj: wrong icltar1 ',icltar10,icltar1 |
| 6029 | if(icltar20.ne.icltar2)write(textini,'(a,2i8)') |
| 6030 | * 'inirj: wrong icltar2 ',icltar20,icltar2 |
| 6031 | if(iclegy10.ne.iclegy1)write(textini,'(a,2i8)') |
| 6032 | * 'inirj: wrong iclegy1 ',iclegy10,iclegy1 |
| 6033 | if(iclegy20.ne.iclegy2)write(textini,'(a,2i8)') |
| 6034 | * 'inirj: wrong iclegy2 ',iclegy20,iclegy2 |
| 6035 | if(egylow0.ne.egylow)write(textini,'(a,2f8.4)') |
| 6036 | * 'inirj: wrong egylow ',egylow0,egylow |
| 6037 | if(egymax0.ne.egymax)write(textini,'(a,2f8.4)') |
| 6038 | * 'inirj: wrong egymax ',egymax0,egymax |
| 6039 | if(epscrw0.ne.epscrw)write(textini,'(a,2f8.4)') |
| 6040 | * 'inirj: wrong epscrw ',epscrw0,epscrw |
| 6041 | if(epscrp0.ne.epscrp)write(textini,'(a,2f8.4)') |
| 6042 | * 'inirj: wrong epscrp ',epscrp0,epscrp |
| 6043 | if(bkbin0.ne.bkbin)write(textini,'(a,2f8.4)') |
| 6044 | * 'inirj: wrong bkbin',bkbin0,bkbin |
| 6045 | if(textini.ne.' ')then |
| 6046 | write(ifmt,'(//10x,a//10x,a//)')textini, |
| 6047 | * 'inirj has to be reinitialized!!!!' |
| 6048 | stop |
| 6049 | endif |
| 6050 | do iiipro=iclpro1,iclpro2 |
| 6051 | do iiitar=icltar1,icltar2 |
| 6052 | do iiiegy=iclegy1,iclegy2 |
| 6053 | do iiib=1,nbkbin |
| 6054 | read(1,*)xkappafit(iiiegy,iiipro,iiitar,iiib) |
| 6055 | enddo |
| 6056 | xkappafit(iiiegy,iiipro,iiitar,nbkbin)=1. |
| 6057 | do iiib=2,nbkbin-1 |
| 6058 | if(xkappafit(iiiegy,iiipro,iiitar,iiib).lt.1.)then |
| 6059 | xkappafit(iiiegy,iiipro,iiitar,iiib)=max(1.,0.5* |
| 6060 | * (xkappafit(iiiegy,iiipro,iiitar,iiib-1) |
| 6061 | * +xkappafit(iiiegy,iiipro,iiitar,iiib+1))) |
| 6062 | endif |
| 6063 | enddo |
| 6064 | do iiidf=idxD0,idxD |
| 6065 | read(1,*)alpDs(iiidf,iiiegy,iiipro,iiitar), |
| 6066 | * alpDps(iiidf,iiiegy,iiipro,iiitar), |
| 6067 | * alpDpps(iiidf,iiiegy,iiipro,iiitar), |
| 6068 | * betDs(iiidf,iiiegy,iiipro,iiitar), |
| 6069 | * betDps(iiidf,iiiegy,iiipro,iiitar), |
| 6070 | * betDpps(iiidf,iiiegy,iiipro,iiitar), |
| 6071 | * gamDs(iiidf,iiiegy,iiipro,iiitar), |
| 6072 | * delDs(iiidf,iiiegy,iiipro,iiitar) |
| 6073 | enddo |
| 6074 | enddo |
| 6075 | enddo |
| 6076 | enddo |
| 6077 | endif |
| 6078 | |
| 6079 | close(1) |
| 6080 | |
| 6081 | endif |
| 6082 | |
| 6083 | |
| 6084 | goto 4 |
| 6085 | endif |
| 6086 | |
| 6087 | write(ifmt,'(a)')'inirj does not exist -> calculate tables ...' |
| 6088 | |
| 6089 | engysave=engy |
| 6090 | maprojsave=maproj |
| 6091 | matargsave=matarg |
| 6092 | iclpros=iclpro |
| 6093 | icltars=icltar |
| 6094 | spmin=4.*q2min |
| 6095 | spminc=4.*q2min+2.*qcmass**2 |
| 6096 | icltar=2 |
| 6097 | |
| 6098 | write(ifmt,'(a)')' tabulate om5 ...' |
| 6099 | |
| 6100 | do iy=1,11 |
| 6101 | sy=spmin*(epmax/2./spmin)**((iy-1)/10.) |
| 6102 | syc=spminc*(epmax/2./spminc)**((iy-1)/10.) |
| 6103 | iclpro=2 |
| 6104 | icltar=2 |
| 6105 | if(iy.eq.1)then |
| 6106 | fhgg01(iy)=-80. |
| 6107 | fhgg02(iy)=-80. |
| 6108 | else |
| 6109 | fhgg01(iy)=log(om51pp(sy,1.,1.,3)) |
| 6110 | fhgg02(iy)=log(om51pp(sy,1.,1.,7)) |
| 6111 | endif |
| 6112 | |
| 6113 | do iclpro=iclpro1,iclpro2 |
| 6114 | if(iy.eq.1)then |
| 6115 | fhgg11(iy,iclpro)=-80. |
| 6116 | fhgg12(iy,iclpro)=-80. |
| 6117 | else |
| 6118 | fhgg11(iy,iclpro)=log(om51pp(sy,1.,1.,4)) |
| 6119 | fhgg12(iy,iclpro)=log(om51pp(sy,1.,1.,9)) |
| 6120 | endif |
| 6121 | do ix=1,10 |
| 6122 | if(ix.le.5)then |
| 6123 | xp=.1*2.**(ix-5) |
| 6124 | else |
| 6125 | xp=.2*(ix-5) |
| 6126 | endif |
| 6127 | if(iy.eq.1)then |
| 6128 | fhqg11(iy,ix,iclpro)=-80. |
| 6129 | fhqg12(iy,ix,iclpro)=-80. |
| 6130 | elseif(iclpro.eq.4)then |
| 6131 | fhqg11(iy,ix,iclpro)=log(om51pp(syc,1.,1.,5)) |
| 6132 | fhqg12(iy,ix,iclpro)=log(om51pp(syc,1.,1.,11)) |
| 6133 | else |
| 6134 | fhqg11(iy,ix,iclpro)=log(om51pp(sy,xp,1.,5)) |
| 6135 | fhqg12(iy,ix,iclpro)=log(om51pp(sy,xp,1.,11)) |
| 6136 | endif |
| 6137 | enddo |
| 6138 | enddo |
| 6139 | |
| 6140 | do iz=1,10 |
| 6141 | z=.1*iz |
| 6142 | |
| 6143 | iclpro=2 |
| 6144 | icltar=2 |
| 6145 | if(iy.eq.1)then |
| 6146 | fhgg0(iy,iz)=-80. |
| 6147 | else |
| 6148 | fhgg0(iy,iz)=log(om51pp(sy,1.,z,6)/z) |
| 6149 | endif |
| 6150 | |
| 6151 | do iclpro=iclpro1,iclpro2 |
| 6152 | if(iy.eq.1)then |
| 6153 | fhgg1(iy,iz,iclpro)=-80. |
| 6154 | else |
| 6155 | fhgg1(iy,iz,iclpro)=log(om51pp(sy,1.,z,8)/z) |
| 6156 | endif |
| 6157 | |
| 6158 | do ix=1,10 |
| 6159 | if(ix.le.5)then |
| 6160 | xp=.1*2.**(ix-5) |
| 6161 | else |
| 6162 | xp=.2*(ix-5) |
| 6163 | endif |
| 6164 | if(iy.eq.1)then |
| 6165 | fhqg1(iy,ix,iz+10*(iclpro-1))=-80. |
| 6166 | elseif(iclpro.eq.4)then |
| 6167 | fhqg1(iy,ix,iz+10*(iclpro-1))=log(om51pp(syc,xp,z,10)/z) |
| 6168 | else |
| 6169 | fhqg1(iy,ix,iz+10*(iclpro-1))=log(om51pp(sy,xp,z,10)/z) |
| 6170 | endif |
| 6171 | enddo |
| 6172 | enddo |
| 6173 | enddo |
| 6174 | enddo |
| 6175 | |
| 6176 | do iclpro=iclpro1,iclpro2 !hadron type (1 - pion, 2 - nucleon, 3 - kaon, 4 - charm) |
| 6177 | do icltar=icltar1,icltar2 !hadron type (2 - nucleon) |
| 6178 | do iy=1,11 |
| 6179 | sy=spmin*(epmax/2./spmin)**((iy-1)/10.) |
| 6180 | syc=spminc*(epmax/2./spminc)**((iy-1)/10.) |
| 6181 | do iz=1,10 |
| 6182 | z=.1*iz |
| 6183 | if(iy.eq.1)then |
| 6184 | fhgg(iy,iz,iclpro+4*(icltar-1))=-80. |
| 6185 | else |
| 6186 | fhgg(iy,iz,iclpro+4*(icltar-1))=log(om51pp(sy,1.,z,0)/z) |
| 6187 | endif |
| 6188 | |
| 6189 | do ix=1,10 |
| 6190 | if(ix.le.5)then |
| 6191 | xp=.1*2.**(ix-5) |
| 6192 | else |
| 6193 | xp=.2*(ix-5) |
| 6194 | endif |
| 6195 | if(iy.eq.1)then |
| 6196 | fhqg(iy,ix,iz+10*(iclpro+4*(icltar-1)-1))=-80. |
| 6197 | fhgq(iy,ix,iz+10*(iclpro+4*(icltar-1)-1))=-80. |
| 6198 | else |
| 6199 | if(iclpro.ne.4)then |
| 6200 | syx=sy |
| 6201 | else |
| 6202 | syx=syc |
| 6203 | endif |
| 6204 | fhqg(iy,ix,iz+10*(iclpro+4*(icltar-1)-1))= |
| 6205 | * log(om51pp(syx,xp,z,1)/z) |
| 6206 | if(icltar.ne.4)then |
| 6207 | syx=sy |
| 6208 | else |
| 6209 | syx=syc |
| 6210 | endif |
| 6211 | fhgq(iy,ix,iz+10*(iclpro+4*(icltar-1)-1))= |
| 6212 | * log(om51pp(syx,xp,z,2)/z) |
| 6213 | endif |
| 6214 | enddo |
| 6215 | enddo |
| 6216 | |
| 6217 | do ix1=1,10 |
| 6218 | if(ix1.le.5)then |
| 6219 | xpp=.1*2.**(ix1-5) |
| 6220 | else |
| 6221 | xpp=.2*(ix1-5) |
| 6222 | endif |
| 6223 | do ix2=1,10 |
| 6224 | if(ix2.le.5)then |
| 6225 | xmm=.1*2.**(ix2-5) |
| 6226 | else |
| 6227 | xmm=.2*(ix2-5) |
| 6228 | endif |
| 6229 | |
| 6230 | if(iy.eq.1)then |
| 6231 | fhqq(iy,ix1,ix2+10*(iclpro+4*(icltar-1)-1))=-80. |
| 6232 | else |
| 6233 | if(iclpro.ne.4.and.icltar.ne.4)then |
| 6234 | syx=sy |
| 6235 | else |
| 6236 | syx=syc |
| 6237 | endif |
| 6238 | fhqq(iy,ix1,ix2+10*(iclpro+4*(icltar-1)-1))= |
| 6239 | * log(pshard(syx,xpp,xmm)) |
| 6240 | endif |
| 6241 | enddo |
| 6242 | enddo |
| 6243 | enddo |
| 6244 | enddo |
| 6245 | |
| 6246 | enddo |
| 6247 | |
| 6248 | if(isetcs.gt.1)then |
| 6249 | |
| 6250 | |
| 6251 | write(ifmt,'(a)')' tabulate fit parameters ...' |
| 6252 | |
| 6253 | engysave=engy |
| 6254 | do iclpro=iclpro1,iclpro2 !hadron type (1 - pion, 2 - nucleon, 3 - kaon, 4 - charm) |
| 6255 | do icltar=icltar1,icltar2 !hadron type (2 - nucleon) |
| 6256 | do iclegy=iclegy2,iclegy1,-1 |
| 6257 | call param |
| 6258 | enddo |
| 6259 | do iiclegy=iclegy2,iclegy1,-1 |
| 6260 | engy=egyfac**(iiclegy-1)*egylow |
| 6261 | call paramini(0) |
| 6262 | call Kfit(iiclegy) |
| 6263 | enddo |
| 6264 | enddo |
| 6265 | enddo |
| 6266 | engy=engysave |
| 6267 | |
| 6268 | endif |
| 6269 | |
| 6270 | write(ifmt,'(a)')' write to inirj ...' |
| 6271 | open(1,file=fnrj,status='unknown') |
| 6272 | write (1,*)alpqua,alplea,alppom,slopom,gamhad,r2had,chad, |
| 6273 | *qcdlam,q2min,q2ini,betpom,glusea,naflav,factk,pt2cut,gamtil |
| 6274 | write (1,*)fhgg,fhqg,fhgq,fhqq,fhgg0,fhgg1,fhqg1 |
| 6275 | *,fhgg01,fhgg02,fhgg11,fhgg12,fhqg11,fhqg12 |
| 6276 | *,ftoint,vfro,vnorm,coefxu1,coefxu2,coefxc2 |
| 6277 | write(1,*)bkbin,iclpro1,iclpro2,icltar1,icltar2,iclegy1,iclegy2 |
| 6278 | *,egylow,egymax,iomega,egyscr,epscrw,epscrp |
| 6279 | do iiipro=iclpro1,iclpro2 |
| 6280 | do iiitar=icltar1,icltar2 |
| 6281 | do iiiegy=iclegy1,iclegy2 |
| 6282 | do iiib=1,nbkbin |
| 6283 | write(1,*)xkappafit(iiiegy,iiipro,iiitar,iiib) |
| 6284 | enddo |
| 6285 | do iiidf=idxD0,idxD |
| 6286 | write(1,*)alpDs(iiidf,iiiegy,iiipro,iiitar), |
| 6287 | * alpDps(iiidf,iiiegy,iiipro,iiitar), |
| 6288 | * alpDpps(iiidf,iiiegy,iiipro,iiitar), |
| 6289 | * betDs(iiidf,iiiegy,iiipro,iiitar), |
| 6290 | * betDps(iiidf,iiiegy,iiipro,iiitar), |
| 6291 | * betDpps(iiidf,iiiegy,iiipro,iiitar), |
| 6292 | * gamDs(iiidf,iiiegy,iiipro,iiitar), |
| 6293 | * delDs(iiidf,iiiegy,iiipro,iiitar) |
| 6294 | enddo |
| 6295 | enddo |
| 6296 | enddo |
| 6297 | enddo |
| 6298 | |
| 6299 | close(1) |
| 6300 | |
| 6301 | engy=engysave |
| 6302 | maproj=maprojsave |
| 6303 | matarg=matargsave |
| 6304 | iclpro=iclpros |
| 6305 | icltar=icltars |
| 6306 | inicnt=1 |
| 6307 | goto 5 |
| 6308 | |
| 6309 | 4 continue |
| 6310 | |
| 6311 | c-------------------------------------- |
| 6312 | c inelastic cross sections |
| 6313 | c--------------------------------------- |
| 6314 | |
| 6315 | if(isetcs.ge.2)then !-------------------- |
| 6316 | |
| 6317 | if(ish.ge.4)write(ifch,*)'cross sections ...' |
| 6318 | 6 continue |
| 6319 | inquire(file=fncs,exist=lcalc) |
| 6320 | if(lcalc)then |
| 6321 | if(inicnt.eq.1)then |
| 6322 | write(ifmt,'(3a)')'read from ',fncs(1:nfncs),' ...' |
| 6323 | open(1,file=fncs(1:nfncs),status='old') |
| 6324 | read (1,*)alpqua0,alplea0,alppom0,slopom0, |
| 6325 | * gamhad0,r2had0,chad0, |
| 6326 | * qcdlam0,q2min0,q2ini0,betpom0,glusea0,naflav0, |
| 6327 | * factk0,pt2cut0 |
| 6328 | if(alpqua0.ne.alpqua)write(ifmt,'(a,2f8.4)') |
| 6329 | * 'inics: wrong alpqua',alpqua0,alpqua |
| 6330 | if(alppom0.ne.alppom)write(ifmt,'(a,2f8.4)') |
| 6331 | * 'inics: wrong alppom',alppom0,alppom |
| 6332 | if(slopom0.ne.slopom)write(ifmt,'(a,2f8.4)') |
| 6333 | * 'inics: wrong slopom',slopom0,slopom |
| 6334 | iii=2 |
| 6335 | if(gamhad0(iii).ne.gamhad(iii))write(ifmt,'(a,i1,a,2f8.4)') |
| 6336 | * 'inics: wrong gamhad(',iii,')',gamhad0(iii),gamhad(iii) |
| 6337 | do iii=1,3 |
| 6338 | if(r2had0(iii) .ne.r2had(iii) )write(ifmt,'(a,i1,a,2f8.4)') |
| 6339 | * 'inics: wrong r2had(',iii,')',r2had0(iii),r2had(iii) |
| 6340 | if(chad0(iii) .ne.chad(iii) )write(ifmt,'(a,i1,a,2f8.4)') |
| 6341 | * 'inics: wrong chad(',iii,')',chad0(iii),chad(iii) |
| 6342 | if(alplea0(iii).ne.alplea0(iii))write(ifmt,'(a,i1,a,2f8.4)') |
| 6343 | * 'inics: wrong alplea(',iii,')',alplea0(iii),alplea(iii) |
| 6344 | enddo |
| 6345 | if(qcdlam0.ne.qcdlam)write(ifmt,'(a,2f8.4)') |
| 6346 | * 'inics: wrong qcdlam',qcdlam0,qcdlam |
| 6347 | if(q2min0 .ne.q2min )write(ifmt,'(a,2f8.4)') |
| 6348 | * 'inics: wrong q2min',q2min0,q2min |
| 6349 | if(q2ini0 .ne.q2ini )write(ifmt,'(a,2f8.4)') |
| 6350 | * 'inics: wrong q2ini',q2ini0,q2ini |
| 6351 | if(betpom0.ne.betpom)write(ifmt,'(a,2f8.4)') |
| 6352 | * 'inics: wrong betpom',betpom0,betpom |
| 6353 | if(glusea0.ne.glusea)write(ifmt,'(a,2f8.4)') |
| 6354 | * 'inics: wrong glusea',glusea0,glusea |
| 6355 | if(naflav0.ne.naflav)write(ifmt,'(a,2f8.4)') |
| 6356 | * 'inics: wrong naflav',naflav0,naflav |
| 6357 | if(factk0 .ne.factk )write(ifmt,'(a,2f8.4)') |
| 6358 | * 'inics: wrong factk', factk0,factk |
| 6359 | if(pt2cut0 .ne.pt2cut )write(ifmt,'(a,2f8.4)') |
| 6360 | * 'inics: wrong pt2cut', pt2cut0,pt2cut |
| 6361 | if(alpqua0.ne.alpqua.or.alppom0.ne.alppom |
| 6362 | * .or.slopom0.ne.slopom.or.gamhad0(2).ne.gamhad(2) |
| 6363 | * .or.r2had0(1).ne.r2had(1).or.r2had0(2).ne.r2had(2) |
| 6364 | * .or.r2had0(3).ne.r2had(3) |
| 6365 | * .or.chad0(1).ne.chad(1).or.chad0(2).ne.chad(2) |
| 6366 | * .or.chad0(3).ne.chad(3) |
| 6367 | * .or.alplea0(1).ne.alplea(1).or.alplea0(2).ne.alplea(2) |
| 6368 | * .or.alplea0(3).ne.alplea(3) |
| 6369 | * .or.qcdlam0.ne.qcdlam.or.q2min0 .ne.q2min |
| 6370 | * .or.q2ini0 .ne.q2ini |
| 6371 | * .or.betpom0.ne.betpom.or.glusea0.ne.glusea.or.naflav0.ne.naflav |
| 6372 | * .or.factk0 .ne.factk .or.pt2cut0.ne.pt2cut)then |
| 6373 | write(ifmt,'(//a//)')' inics has to be reinitialized!!!!' |
| 6374 | stop |
| 6375 | endif |
| 6376 | |
| 6377 | read(1,*)isetcs0,iclpro10,iclpro20,icltar10,icltar20,iclegy10 |
| 6378 | * ,iclegy20,egylow0,egymax0,iomega0,egyscr0,epscrw0,epscrp0 |
| 6379 | |
| 6380 | if(iclpro10.ne.iclpro1)write(ifmt,'(a,2i2)') |
| 6381 | * 'inics: wrong iclpro1',iclpro10,iclpro1 |
| 6382 | if(iclpro20.ne.iclpro2)write(ifmt,'(a,2i2)') |
| 6383 | * 'inics: wrong iclpro2',iclpro20,iclpro2 |
| 6384 | if(icltar10.ne.icltar1)write(ifmt,'(a,2i2)') |
| 6385 | * 'inics: wrong icltar1',icltar10,icltar1 |
| 6386 | if(icltar20.ne.icltar2)write(ifmt,'(a,2i2)') |
| 6387 | * 'inics: wrong icltar2',icltar20,icltar2 |
| 6388 | if(iclegy10.ne.iclegy1)write(ifmt,'(a,2i4)') |
| 6389 | * 'inics: wrong iclegy1',iclegy10,iclegy1 |
| 6390 | if(iclegy20.ne.iclegy2)write(ifmt,'(a,2i4)') |
| 6391 | * 'inics: wrong iclegy2',iclegy20,iclegy2 |
| 6392 | if(egylow0.ne.egylow)write(ifmt,'(a,2f8.4)') |
| 6393 | * 'inics: wrong egylow',egylow0,egylow |
| 6394 | if(egymax0.ne.egymax)write(ifmt,'(a,2f12.4)') |
| 6395 | * 'inics: wrong egymax',egymax0,egymax |
| 6396 | if(egyscr0.ne.egyscr)write(ifmt,'(a,2f8.4)') |
| 6397 | * 'inics: wrong egyscr ',egyscr0,egyscr |
| 6398 | if(epscrw0.ne.epscrw)write(ifmt,'(a,2f8.4)') |
| 6399 | * 'inics: wrong epscrw',epscrw0,epscrw |
| 6400 | if(epscrp0.ne.epscrp)write(ifmt,'(a,2f8.4)') |
| 6401 | * 'inics: wrong epscrp',epscrp0,epscrp |
| 6402 | if(isetcs0.lt.isetcs)write(ifmt,'(a,2f8.4)') |
| 6403 | * 'inics: wrong isetcs',isetcs0,isetcs |
| 6404 | if(iclpro10.ne.iclpro1.or.iclpro20.ne.iclpro2 |
| 6405 | * .or.icltar10.ne.icltar1.or.icltar20.ne.icltar2 |
| 6406 | * .or.iclegy10.ne.iclegy1.or.iclegy20.ne.iclegy2 |
| 6407 | * .or.egylow0.ne.egylow.or.egymax0.ne.egymax |
| 6408 | * .or.egyscr0.ne.egyscr.or.epscrw0.ne.epscrw.or.isetcs0.lt.isetcs |
| 6409 | * .or.epscrp0.ne.epscrp)then |
| 6410 | write(ifmt,'(//a//)')' inics has to be reinitialized!!!!' |
| 6411 | stop |
| 6412 | endif |
| 6413 | if(isetcs.eq.2)then |
| 6414 | read (1,*)asect,asect2,asectn,asect4 |
| 6415 | elseif(isetcs.eq.3)then |
| 6416 | read (1,*)asect1,asect,asect3,asectn |
| 6417 | else |
| 6418 | write(ifmt,'(//a//)')' Wrong isetcs in psaini !!!!' |
| 6419 | endif |
| 6420 | |
| 6421 | close(1) |
| 6422 | |
| 6423 | endif |
| 6424 | |
| 6425 | |
| 6426 | goto 7 |
| 6427 | |
| 6428 | endif |
| 6429 | |
| 6430 | ifradesave=ifrade |
| 6431 | idprojsave=idproj |
| 6432 | idprojinsave=idprojin |
| 6433 | idtargsave=idtarg |
| 6434 | idtarginsave=idtargin |
| 6435 | laprojsave=laproj |
| 6436 | latargsave=latarg |
| 6437 | maprojsave=maproj |
| 6438 | matargsave=matarg |
| 6439 | icltarsave=icltar |
| 6440 | iclprosave=iclpro |
| 6441 | engysave=engy |
| 6442 | pnllsave=pnll |
| 6443 | elabsave=elab |
| 6444 | ecmssave=ecms |
| 6445 | iclegysave=iclegy |
| 6446 | nrevtsave=nrevt |
| 6447 | neventsave=nevent |
| 6448 | ntevtsave=ntevt |
| 6449 | isetcssave=isetcs |
| 6450 | noebinsave=noebin |
| 6451 | isigmasave=isigma |
| 6452 | bminimsave=bminim |
| 6453 | bmaximsave=bmaxim |
| 6454 | bimevtsave=bimevt |
| 6455 | fctrmxsave=fctrmx |
| 6456 | |
| 6457 | |
| 6458 | isetcs=2 |
| 6459 | isigma=1 |
| 6460 | noebin=1 |
| 6461 | nevent=100 |
| 6462 | idtarg=1120 |
| 6463 | idtargin=1120 |
| 6464 | bminim=0. |
| 6465 | bmaxim=10000. |
| 6466 | fctrmx=100. !to get stable pA and AA cross section, this number has to be large |
| 6467 | ifrade=0 !to save time, no fragmentation |
| 6468 | |
| 6469 | write(ifmt,'(a)')'inics does not exist -> calculate tables ...' |
| 6470 | |
| 6471 | laproj=-1 |
| 6472 | maproj=1 |
| 6473 | icltar=2 |
| 6474 | do iclpro=1,4 |
| 6475 | if(iclpro.lt.iclpro1.or.iclpro.gt.iclpro2)then |
| 6476 | do ie=1,7 |
| 6477 | do iia=1,7 |
| 6478 | asect1(ie,iclpro,iia)=0. |
| 6479 | asect2(ie,iclpro,iia)=0. |
| 6480 | enddo |
| 6481 | enddo |
| 6482 | else |
| 6483 | do ie=1,7 |
| 6484 | engy=1.5*10.**(ie-1) |
| 6485 | call paramini(0) |
| 6486 | write(ifmt,*)' calcul. ',ie,' (',iclpro,')',engy |
| 6487 | |
| 6488 | do iia=1,7 |
| 6489 | matarg=2**(iia-1) |
| 6490 | sigine=0. |
| 6491 | if(matarg.eq.1)then !hadron-proton interaction |
| 6492 | call psfz(gz2,0.) |
| 6493 | gin=gz2*pi*10. |
| 6494 | else |
| 6495 | call conini |
| 6496 | rad=radnuc(matarg) |
| 6497 | bm=rad+2. |
| 6498 | rrr=rad/difnuc(matarg) |
| 6499 | rrrm=rrr+log(9.) |
| 6500 | anorm=1.5/pi/rrr**3/(1.+(pi/rrr)**2)/difnuc(matarg)**2 |
| 6501 | gin=(ptgau(ptfau,bm,2)+ptgau1(bm,2))*10. !sig_in |
| 6502 | endif |
| 6503 | if(ish.ge.3)write (ifch,226)gin |
| 6504 | 226 format(2x,'psaini: hadron-nucleus cross sections:'/ |
| 6505 | * 4x,'gin=',e10.3) |
| 6506 | asect1(ie,iclpro,iia)=log(gin) |
| 6507 | asect(ie,iclpro,iia)=asect1(ie,iclpro,iia) |
| 6508 | write(ifmt,*)' matarg,gin :' |
| 6509 | * ,matarg,gin |
| 6510 | enddo |
| 6511 | enddo |
| 6512 | |
| 6513 | if(isetcssave.ge.3)then |
| 6514 | |
| 6515 | if(iclpro.eq.1)then |
| 6516 | idprojin=120 |
| 6517 | elseif(iclpro.eq.2)then |
| 6518 | idprojin=1120 |
| 6519 | elseif(iclpro.eq.3)then |
| 6520 | idprojin=130 |
| 6521 | endif |
| 6522 | do ie=1,7 |
| 6523 | engy=1.5*10.**(ie-1) |
| 6524 | if(engy.le.egymin)engy=egymin |
| 6525 | if(engy.ge.egymax)engy=egymax |
| 6526 | write(ifmt,*)' simul. ',ie,' (',iclpro,')',engy |
| 6527 | write(ifch,*)' simul. ',ie,' (',iclpro,')',engy |
| 6528 | do iia=1,7 |
| 6529 | matarg=2**(iia-1) |
| 6530 | latarg=min(1,matarg/2) |
| 6531 | ntevt=0 |
| 6532 | nrevt=0 |
| 6533 | pnll=-1. |
| 6534 | elab=-1. |
| 6535 | ecms=-1. |
| 6536 | ekin=-1. |
| 6537 | call conini |
| 6538 | call ainit |
| 6539 | do n=1,nevent |
| 6540 | ntry=0 |
| 6541 | 222 ntevt=ntevt+1 |
| 6542 | iret=0 |
| 6543 | ntry=ntry+1 |
| 6544 | bimevt=-1. |
| 6545 | if(ntry.lt.10000)then |
| 6546 | c if random sign for projectile, set it here |
| 6547 | idproj=idprojin*(1-2*int(rangen()+0.5d0)) |
| 6548 | call emsaaa(iret) |
| 6549 | if(iret.gt.0)goto 222 |
| 6550 | else |
| 6551 | ntevt=ntry |
| 6552 | endif |
| 6553 | enddo |
| 6554 | a=pi*bmax**2 |
| 6555 | if(a.gt.0..and.ntevt.gt.0.)then |
| 6556 | xs=float(nevent)/float(ntevt)*a*10. |
| 6557 | write(ifmt,*)' matarg,nevent,ntevt,bmax,xs :' |
| 6558 | . ,matarg,nevent,ntevt,bmax,xs |
| 6559 | write(ifch,*)' matarg,nevent,ntevt,bmax,xs :' |
| 6560 | . ,matarg,nevent,ntevt,bmax,xs |
| 6561 | asect2(ie,iclpro,iia)=log(xs) |
| 6562 | else |
| 6563 | write(ifmt,*)' Problem ? ',iclpro,matarg,bmax,ntevt |
| 6564 | asect2(ie,iclpro,iia)=0. |
| 6565 | endif |
| 6566 | enddo |
| 6567 | enddo |
| 6568 | else |
| 6569 | do ie=1,7 |
| 6570 | do iia=1,7 |
| 6571 | asect2(ie,iclpro,iia)=0. |
| 6572 | enddo |
| 6573 | enddo |
| 6574 | endif |
| 6575 | endif |
| 6576 | enddo |
| 6577 | |
| 6578 | idprojin=1120 |
| 6579 | iclpro=2 |
| 6580 | icltar=2 |
| 6581 | do ie=1,7 |
| 6582 | engy=1.5*10.**(ie-1) |
| 6583 | call paramini(0) |
| 6584 | write(ifmt,*)' calcul. AB ',ie,engy |
| 6585 | |
| 6586 | do iia=1,7 |
| 6587 | maproj=2**(iia-1) |
| 6588 | laproj=max(1,maproj/2) |
| 6589 | do iib=1,7 |
| 6590 | matarg=2**(iib-1) |
| 6591 | latarg=max(1,matarg/2) |
| 6592 | sigine=0. |
| 6593 | if(matarg.eq.1.and.maproj.eq.1)then !proton-proton interaction |
| 6594 | call psfz(gz2,0.) |
| 6595 | gin=gz2*pi*10. |
| 6596 | else |
| 6597 | call conini |
| 6598 | if(maproj.eq.1)then |
| 6599 | rad=radnuc(matarg) |
| 6600 | bm=rad+2. |
| 6601 | rrr=rad/difnuc(matarg) |
| 6602 | rrrm=rrr+log(9.) |
| 6603 | anorm=1.5/pi/rrr**3/(1.+(pi/rrr)**2)/difnuc(matarg)**2 |
| 6604 | gin=(ptgau(ptfau,bm,2)+ptgau1(bm,2))*10. !sig_in |
| 6605 | elseif(matarg.eq.1)then |
| 6606 | radp=radnuc(maproj) |
| 6607 | bm=radp+2. |
| 6608 | rrrp=radp/difnuc(maproj) |
| 6609 | rrrmp=rrrp+log(9.) |
| 6610 | anormp=1.5/pi/rrrp**3/(1.+(pi/rrrp)**2)/difnuc(maproj)**2 |
| 6611 | gin=(ptgau(ptfau,bm,1)+ptgau1(bm,1))*10. !sig_in |
| 6612 | else |
| 6613 | rad=radnuc(matarg)+1. |
| 6614 | radp=radnuc(maproj)+1. |
| 6615 | bm=rad+radp+2. |
| 6616 | rrr=rad/difnuc(matarg) |
| 6617 | rrrm=rrr+log(9.) |
| 6618 | rrrp=radp/difnuc(maproj) |
| 6619 | rrrmp=rrrp+log(9.) |
| 6620 | anorm=1.5/pi/rrr**3/(1.+(pi/rrr)**2)/difnuc(matarg)**2 |
| 6621 | anormp=1.5/pi/rrrp**3/(1.+(pi/rrrp)**2)/difnuc(maproj)**2 |
| 6622 | gin=(ptgau(ptfauAA,bm,2)+ptgau2(bm))*10. |
| 6623 | endif |
| 6624 | endif |
| 6625 | if(ish.ge.3)write (ifch,227)gin |
| 6626 | 227 format(2x,'psaini: nucleus-nucleus cross sections:'/ |
| 6627 | * 4x,'gin=',e10.3) |
| 6628 | asect3(ie,iia,iib)=log(gin) |
| 6629 | asectn(ie,iia,iib)=asect3(ie,iia,iib) |
| 6630 | write(ifmt,*)' maproj,matarg,gin :' |
| 6631 | * ,maproj,matarg,gin |
| 6632 | |
| 6633 | enddo |
| 6634 | enddo |
| 6635 | enddo |
| 6636 | |
| 6637 | if(isetcssave.ge.3)then |
| 6638 | |
| 6639 | do ie=1,7 |
| 6640 | engy=1.5*10.**(ie-1) |
| 6641 | if(engy.le.egymin)engy=egymin |
| 6642 | if(engy.ge.egymax)engy=egymax |
| 6643 | write(ifmt,*)' AB xs ',ie,engy |
| 6644 | write(ifch,*)' AB xs ',ie,engy |
| 6645 | do iia=1,7 |
| 6646 | maproj=2**(iia-1) |
| 6647 | laproj=max(1,maproj/2) |
| 6648 | do iib=1,7 |
| 6649 | matarg=2**(iib-1) |
| 6650 | latarg=max(1,matarg/2) |
| 6651 | ntevt=0 |
| 6652 | nrevt=0 |
| 6653 | pnll=-1. |
| 6654 | elab=-1. |
| 6655 | ecms=-1. |
| 6656 | ekin=-1. |
| 6657 | call conini |
| 6658 | call ainit |
| 6659 | |
| 6660 | do n=1,nevent |
| 6661 | ntry=0 |
| 6662 | 223 ntevt=ntevt+1 |
| 6663 | iret=0 |
| 6664 | ntry=ntry+1 |
| 6665 | bimevt=-1. |
| 6666 | if(ntry.lt.10000)then |
| 6667 | call emsaaa(iret) |
| 6668 | if(iret.gt.0)goto 223 |
| 6669 | else |
| 6670 | ntevt=ntry |
| 6671 | endif |
| 6672 | enddo |
| 6673 | a=pi*bmax**2 |
| 6674 | if(a.gt.0..and.ntevt.gt.0.)then |
| 6675 | xs=float(nevent)/float(ntevt)*a*10. |
| 6676 | write(ifmt,*)' maproj,matarg,nevent,ntevt,bmax,xs :' |
| 6677 | & ,maproj,matarg,nevent,ntevt,bmax,xs |
| 6678 | write(ifch,*)' maproj,matarg,nevent,ntevt,bmax,xs :' |
| 6679 | & ,maproj,matarg,nevent,ntevt,bmax,xs |
| 6680 | asect4(ie,iia,iib)=log(xs) |
| 6681 | else |
| 6682 | write(ifmt,*)' Problem ? ',maproj,matarg,bmax,ntevt |
| 6683 | asect4(ie,iia,iib)=0. |
| 6684 | endif |
| 6685 | enddo |
| 6686 | enddo |
| 6687 | enddo |
| 6688 | else |
| 6689 | do ie=1,7 |
| 6690 | do iia=1,7 |
| 6691 | do iib=1,7 |
| 6692 | asect4(ie,iia,iib)=0. |
| 6693 | enddo |
| 6694 | enddo |
| 6695 | enddo |
| 6696 | endif |
| 6697 | |
| 6698 | ifrade=ifradesave |
| 6699 | idproj=idprojsave |
| 6700 | idprojin=idprojinsave |
| 6701 | idtarg=idtargsave |
| 6702 | idtargin=idtarginsave |
| 6703 | laproj=laprojsave |
| 6704 | latarg=latargsave |
| 6705 | maproj=maprojsave |
| 6706 | matarg=matargsave |
| 6707 | icltar=icltarsave |
| 6708 | iclpro=iclprosave |
| 6709 | engy=engysave |
| 6710 | pnll=pnllsave |
| 6711 | elab=elabsave |
| 6712 | ecms=ecmssave |
| 6713 | iclegy=iclegysave |
| 6714 | nrevt=nrevtsave |
| 6715 | nevent=neventsave |
| 6716 | ntevt=ntevtsave |
| 6717 | isetcs=isetcssave |
| 6718 | noebin=noebinsave |
| 6719 | isigma=isigmasave |
| 6720 | bminim=bminimsave |
| 6721 | bmaxim=bmaximsave |
| 6722 | bimevt=bimevtsave |
| 6723 | fctrmx=fctrmxsave |
| 6724 | inicnt=1 |
| 6725 | |
| 6726 | write(ifmt,'(a)')'write to inics ...' |
| 6727 | open(1,file=fncs,status='unknown') |
| 6728 | write (1,*)alpqua,alplea,alppom,slopom,gamhad,r2had,chad, |
| 6729 | *qcdlam,q2min,q2ini,betpom,glusea,naflav,factk,pt2cut |
| 6730 | write(1,*)isetcs,iclpro1,iclpro2,icltar1,icltar2,iclegy1,iclegy2 |
| 6731 | *,egylow,egymax,iomega,egyscr,epscrw,epscrp |
| 6732 | write (1,*)asect1,asect2,asect3,asect4 |
| 6733 | |
| 6734 | close(1) |
| 6735 | |
| 6736 | |
| 6737 | goto 6 |
| 6738 | |
| 6739 | 7 continue |
| 6740 | |
| 6741 | endif !----------isetcs.ge.2----------- |
| 6742 | |
| 6743 | call utprix('psaini',ish,ishini,4) |
| 6744 | |
| 6745 | return |
| 6746 | end |
| 6747 | |
| 6748 | cc----------------------------------------------------------------------- |
| 6749 | c function fjetxx(jpp,je1,je2) |
| 6750 | cc----------------------------------------------------------------------- |
| 6751 | cc almost exactly psjet, just with Eqcd replaced by fparton |
| 6752 | cc for testing |
| 6753 | cc gives indeed the same result as jetx |
| 6754 | cc so the integration seems correct |
| 6755 | cc----------------------------------------------------------------------- |
| 6756 | c double precision xx1,xx2,s2min,xmin,xmax,xmin1,xmax1,t,tmin |
| 6757 | c *,tmax,sh,z,qtmin,ft,fx1,fx2 |
| 6758 | c common /ar3/ x1(7),a1(7) |
| 6759 | c common /ar9/ x9(3),a9(3) |
| 6760 | c include 'epos.inc' |
| 6761 | c include 'epos.incsem' |
| 6762 | c |
| 6763 | c fjetxx=0. |
| 6764 | c s=engy*engy |
| 6765 | c s2min=4.d0*q2min |
| 6766 | c |
| 6767 | c zmin=s2min/dble(s) |
| 6768 | c zmax=1 |
| 6769 | c |
| 6770 | c zmin=zmin**(-delh) |
| 6771 | c zmax=zmax**(-delh) |
| 6772 | c do i=1,3 |
| 6773 | c do m=1,2 |
| 6774 | c z=dble(.5*(zmax+zmin+(zmin-zmax)*(2*m-3)*x9(i)))**(-1./delh) |
| 6775 | c xmin=dsqrt(z) |
| 6776 | c sh=z*dble(s) |
| 6777 | c qtmin=max(dble(q2min),dble(q2ini)/(1.d0-dsqrt(z))) |
| 6778 | c tmin=max(0.d0,1.d0-4.d0*qtmin/sh) |
| 6779 | c tmin=2.d0*qtmin/(1.d0+dsqrt(tmin)) |
| 6780 | c tmax=sh/2.d0 |
| 6781 | c ft=0.d0 |
| 6782 | c do i1=1,3 |
| 6783 | c do m1=1,2 |
| 6784 | c t=2.d0*tmin/(1.d0+tmin/tmax-dble(x9(i1)*(2*m1-3)) |
| 6785 | c & *(1.d0-tmin/tmax)) |
| 6786 | c qt=t*(1.d0-t/sh) |
| 6787 | c xmax=1.d0-q2ini/qt |
| 6788 | c xmin=max(dsqrt(z),z/xmax) !xm<xp !!! |
| 6789 | c if(xmin.gt.xmax.and.ish.ge.1)write(ifmt,*)'fjetxx:xmin,xmax' |
| 6790 | c * ,xmin,xmax |
| 6791 | c fx1=0.d0 |
| 6792 | c fx2=0.d0 |
| 6793 | c if(xmax.gt..8d0)then |
| 6794 | c xmin1=max(xmin,.8d0) |
| 6795 | c do i2=1,3 |
| 6796 | c do m2=1,2 |
| 6797 | c xx1=1.d0-(1.d0-xmax)*((1.d0-xmin1)/(1.d0-xmax))** |
| 6798 | c * dble(.5+x9(i2)*(m2-1.5)) |
| 6799 | c xx2=z/xx1 |
| 6800 | c fb=ffsigj(sngl(t),qt,sngl(xx1),sngl(xx2),jpp,je1,je2) |
| 6801 | c * +ffsigj(sngl(t),qt,sngl(xx2),sngl(xx1),jpp,je1,je2) |
| 6802 | c fx1=fx1+dble(a9(i2)*fb)*(1.d0/xx1-1.d0) |
| 6803 | c * *pssalf(qt/qcdlam)**2 |
| 6804 | c enddo |
| 6805 | c enddo |
| 6806 | c fx1=fx1*dlog((1.d0-xmin1)/(1.d0-xmax)) |
| 6807 | c endif |
| 6808 | c if(xmin.lt..8d0)then |
| 6809 | c xmax1=min(xmax,.8d0) |
| 6810 | c do i2=1,3 |
| 6811 | c do m2=1,2 |
| 6812 | c xx1=xmin*(xmax1/xmin)**dble(.5+x9(i2)*(m2-1.5)) |
| 6813 | c xx2=z/xx1 |
| 6814 | c |
| 6815 | c fb=0. |
| 6816 | c fb=fb |
| 6817 | c * +ffsigj(sngl(t),qt,sngl(xx1),sngl(xx2),jpp,je1,je2) |
| 6818 | c * +ffsigj(sngl(t),qt,sngl(xx2),sngl(xx1),jpp,je1,je2) |
| 6819 | c fx2=fx2+dble(a9(i2))*fb*pssalf(qt/qcdlam)**2 |
| 6820 | c enddo |
| 6821 | c enddo |
| 6822 | c fx2=fx2*dlog(xmax1/xmin) |
| 6823 | c endif |
| 6824 | c ft=ft+dble(a9(i1))*(fx1+fx2)*t**2 |
| 6825 | c enddo |
| 6826 | c enddo |
| 6827 | c ft=ft*(1.d0/tmin-1.d0/tmax) |
| 6828 | c fjetxx=fjetxx+a9(i)*sngl(ft*z**(1.+delh)/sh**2) |
| 6829 | c * /z ! ffsig = xp f xm f sigma |
| 6830 | c enddo |
| 6831 | c enddo |
| 6832 | c fjetxx=fjetxx*(zmin-zmax)/delh*pi**3 |
| 6833 | c ! * /2. !??????????????? kkkkkkkkk |
| 6834 | c return |
| 6835 | c end |
| 6836 | c |
| 6837 | c |
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