| 3820ca8e |
1 | |
| 2 | CDECK ID>, HWDCLE. |
| 3 | |
| 4 | *CMZ :- -28/01/92 12.34.44 by Mike Seymour |
| 5 | |
| 6 | *-- Author : Luca Stanco |
| 7 | |
| 8 | C----------------------------------------------------------------------- |
| 9 | |
| 10 | SUBROUTINE HWDCLE(IHEP) |
| 11 | |
| 12 | C----------------------------------------------------------------------- |
| 13 | |
| 14 | C INTERFACE TO QQ-CLEO MONTE CARLO (LS 11/12/91) |
| 15 | |
| 16 | C----------------------------------------------------------------------- |
| 17 | |
| 18 | INCLUDE 'HERWIG61.INC' |
| 19 | |
| 20 | INTEGER IHEP,IIHEP,NHEPHF,QQLMAT |
| 21 | |
| 22 | LOGICAL QQLERR |
| 23 | |
| 24 | CHARACTER*8 NAME |
| 25 | |
| 26 | EXTERNAL QQLMAT |
| 27 | |
| 28 | C---QQ-CLEO COMMON'S |
| 29 | |
| 30 | C*** MCPARS.INC |
| 31 | |
| 32 | INTEGER MCTRK, NTRKS, MCVRTX, NVTXS, MCHANS, MCDTRS, MPOLQQ |
| 33 | |
| 34 | INTEGER MCNUM, MCSTBL, MCSTAB, MCTLQQ, MDECQQ |
| 35 | |
| 36 | INTEGER MHLPRB, MHLLST, MHLANG, MCPLST, MFDECA |
| 37 | |
| 38 | PARAMETER (MCTRK = 512) |
| 39 | |
| 40 | PARAMETER (NTRKS = MCTRK) |
| 41 | |
| 42 | PARAMETER (MCVRTX = 256) |
| 43 | |
| 44 | PARAMETER (NVTXS = MCVRTX) |
| 45 | |
| 46 | PARAMETER (MCHANS = 4000) |
| 47 | |
| 48 | PARAMETER (MCDTRS = 8000) |
| 49 | |
| 50 | PARAMETER (MPOLQQ = 300) |
| 51 | |
| 52 | PARAMETER (MCNUM = 500) |
| 53 | |
| 54 | PARAMETER (MCSTBL = 40) |
| 55 | |
| 56 | PARAMETER (MCSTAB = 512) |
| 57 | |
| 58 | PARAMETER (MCTLQQ = 100) |
| 59 | |
| 60 | PARAMETER (MDECQQ = 300) |
| 61 | |
| 62 | PARAMETER (MHLPRB = 500) |
| 63 | |
| 64 | PARAMETER (MHLLST = 1000) |
| 65 | |
| 66 | PARAMETER (MHLANG = 500) |
| 67 | |
| 68 | PARAMETER (MCPLST = 200) |
| 69 | |
| 70 | PARAMETER (MFDECA = 5) |
| 71 | |
| 72 | C*** MCPROP.INC |
| 73 | |
| 74 | REAL AMASS, CHARGE, CTAU, SPIN, RWIDTH, RMASMN, RMASMX |
| 75 | |
| 76 | REAL RMIXPP, RCPMIX |
| 77 | |
| 78 | INTEGER NPMNQQ, NPMXQQ, IDMC, INVMC, LPARTY, CPARTY |
| 79 | |
| 80 | INTEGER IMIXPP, ICPMIX |
| 81 | |
| 82 | COMMON/MCMAS1/ |
| 83 | |
| 84 | * NPMNQQ, NPMXQQ, |
| 85 | |
| 86 | * AMASS(-20:MCNUM), CHARGE(-20:MCNUM), CTAU(-20:MCNUM), |
| 87 | |
| 88 | * IDMC(-20:MCNUM), SPIN(-20:MCNUM), |
| 89 | |
| 90 | * RWIDTH(-20:MCNUM), RMASMN(-20:MCNUM), RMASMX(-20:MCNUM), |
| 91 | |
| 92 | * LPARTY(-20:MCNUM), CPARTY(-20:MCNUM), |
| 93 | |
| 94 | * IMIXPP(-20:MCNUM), RMIXPP(-20:MCNUM), |
| 95 | |
| 96 | * ICPMIX(-20:MCNUM), RCPMIX(-20:MCNUM), |
| 97 | |
| 98 | * INVMC(0:MCSTBL) |
| 99 | |
| 100 | C |
| 101 | |
| 102 | INTEGER NPOLQQ, IPOLQQ |
| 103 | |
| 104 | COMMON/MCPOL1/ |
| 105 | |
| 106 | * NPOLQQ, IPOLQQ(5,MPOLQQ) |
| 107 | |
| 108 | C |
| 109 | |
| 110 | CHARACTER QNAME*10, PNAME*10 |
| 111 | |
| 112 | COMMON/MCNAMS/ |
| 113 | |
| 114 | * QNAME(37), PNAME(-20:MCNUM) |
| 115 | |
| 116 | C |
| 117 | |
| 118 | C*** MCCOMS.INC |
| 119 | |
| 120 | INTEGER NCTLQQ, NDECQQ, IVRSQQ, IORGQQ, IRS1QQ |
| 121 | |
| 122 | INTEGER IEVTQQ, IRUNQQ, IBMRAD |
| 123 | |
| 124 | INTEGER NTRKMC, QQNTRK, NSTBMC, NSTBQQ, NCHGMC, NCHGQQ |
| 125 | |
| 126 | INTEGER IRANQQ, IRANMC, IRANCC, IRS2QQ |
| 127 | |
| 128 | INTEGER IPFTQQ, IPCDQQ, IPRNTV, ITYPEV, IDECSV, IDAUTV |
| 129 | |
| 130 | INTEGER ISTBMC, NDAUTV |
| 131 | |
| 132 | INTEGER IVPROD, IVDECA |
| 133 | |
| 134 | REAL BFLDQQ |
| 135 | |
| 136 | REAL ENERQQ, BEAMQQ, BMPSQQ, BMNGQQ, EWIDQQ, BWPSQQ, BWNGQQ |
| 137 | |
| 138 | REAL BPOSQQ, BSIZQQ |
| 139 | |
| 140 | REAL ECM, P4CMQQ, P4PHQQ, ENERNW, BEAMNW, BEAMP, BEAMN |
| 141 | |
| 142 | REAL PSAV, P4QQ, HELCQQ |
| 143 | |
| 144 | CHARACTER DATEQQ*20, TIMEQQ*20, FOUTQQ*80, FCTLQQ*80, FDECQQ*80 |
| 145 | |
| 146 | CHARACTER FGEOQQ*80 |
| 147 | |
| 148 | CHARACTER CCTLQQ*80, CDECQQ*80 |
| 149 | |
| 150 | C |
| 151 | |
| 152 | COMMON/MCCM1A/ |
| 153 | |
| 154 | * NCTLQQ, NDECQQ, IVRSQQ, IORGQQ, IRS1QQ(3), BFLDQQ, |
| 155 | |
| 156 | * ENERQQ, BEAMQQ, BMPSQQ, BMNGQQ, EWIDQQ, BWPSQQ, BWNGQQ, |
| 157 | |
| 158 | * BPOSQQ(3), BSIZQQ(3), |
| 159 | |
| 160 | * IEVTQQ, IRUNQQ, |
| 161 | |
| 162 | * IBMRAD, ECM, P4CMQQ(4), P4PHQQ(4), |
| 163 | |
| 164 | * ENERNW, BEAMNW, BEAMP, BEAMN, |
| 165 | |
| 166 | * NTRKMC, QQNTRK, NSTBMC, NSTBQQ, NCHGMC, NCHGQQ, |
| 167 | |
| 168 | * IRANQQ(2), IRANMC(2), IRANCC(2), IRS2QQ(5), |
| 169 | |
| 170 | * IPFTQQ(MCTRK), IPCDQQ(MCTRK), IPRNTV(MCTRK), ITYPEV(MCTRK,2), |
| 171 | |
| 172 | * IDECSV(MCTRK), IDAUTV(MCTRK), ISTBMC(MCTRK), NDAUTV(MCTRK), |
| 173 | |
| 174 | * IVPROD(MCTRK), IVDECA(MCTRK), |
| 175 | |
| 176 | * PSAV(MCTRK,4), HELCQQ(MCTRK), P4QQ(4,MCTRK) |
| 177 | |
| 178 | C |
| 179 | |
| 180 | COMMON/MCCM1B/ |
| 181 | |
| 182 | * DATEQQ, TIMEQQ, FOUTQQ, FCTLQQ, FDECQQ, FGEOQQ, |
| 183 | |
| 184 | * CCTLQQ(MCTLQQ), CDECQQ(MDECQQ) |
| 185 | |
| 186 | INTEGER IDSTBL |
| 187 | |
| 188 | COMMON/MCCM1C/ |
| 189 | |
| 190 | * IDSTBL(MCSTAB) |
| 191 | |
| 192 | C |
| 193 | |
| 194 | INTEGER IFINAL(MCTRK), IFINSV(MCSTAB), NFINAL |
| 195 | |
| 196 | EQUIVALENCE (IFINAL,ISTBMC), (IFINSV,IDSTBL), (NFINAL,NSTBMC) |
| 197 | |
| 198 | C |
| 199 | |
| 200 | INTEGER NVRTX, ITRKIN, NTRKOU, ITRKOU, IVKODE |
| 201 | |
| 202 | REAL XVTX, TVTX, RVTX |
| 203 | |
| 204 | COMMON/MCCM2/ |
| 205 | |
| 206 | * NVRTX, XVTX(MCVRTX,3), TVTX(MCVRTX), RVTX(MCVRTX), |
| 207 | |
| 208 | * ITRKIN(MCVRTX), NTRKOU(MCVRTX), ITRKOU(MCVRTX), |
| 209 | |
| 210 | * IVKODE(MCVRTX) |
| 211 | |
| 212 | C*** MCGEN.INC |
| 213 | |
| 214 | INTEGER QQIST,QQIFR,QQN,QQK,QQMESO,QQNC,QQKC,QQLASTN |
| 215 | |
| 216 | REAL QQPUD,QQPS1,QQSIGM,QQMAS,QQPAR,QQCMIX,QQCND,QQBSPI,QQBSYM,QQP |
| 217 | |
| 218 | REAL QQPC,QQCZF |
| 219 | |
| 220 | C |
| 221 | |
| 222 | COMMON/DATA1/QQIST,QQIFR,QQPUD,QQPS1,QQSIGM,QQMAS(15),QQPAR(25) |
| 223 | |
| 224 | COMMON/DATA2/QQCZF(15),QQMESO(36),QQCMIX(6,2) |
| 225 | |
| 226 | COMMON/DATA3/QQCND(3) |
| 227 | |
| 228 | COMMON/DATA5/QQBSPI(5),QQBSYM(3) |
| 229 | |
| 230 | COMMON/JET/QQN,QQK(250,2),QQP(250,5),QQNC,QQKC(10),QQPC(10,4), |
| 231 | |
| 232 | * QQLASTN |
| 233 | |
| 234 | C--- |
| 235 | |
| 236 | IF(FSTEVT) THEN |
| 237 | |
| 238 | C---INITIALIZE QQ-CLEO |
| 239 | |
| 240 | CALL QQINIT(QQLERR) |
| 241 | |
| 242 | IF(QQLERR) CALL HWWARN('HWDEUR',500,*999) |
| 243 | |
| 244 | ENDIF |
| 245 | |
| 246 | C---CONSTRUCT THE HADRON FOR QQ-CLEO |
| 247 | |
| 248 | C NOTE: THE IDPDG CODE IS PROVIDED THROUGH THE QQLMAT ROUTINE |
| 249 | |
| 250 | C FROM THE CLEO PACKAGE (QQ-CLEO <--> IDPDG CODE TRANSFORMATION) |
| 251 | |
| 252 | QQN=1 |
| 253 | |
| 254 | IDHEP(IHEP)=IDPDG(IDHW(IHEP)) |
| 255 | |
| 256 | QQK(1,1)=0 |
| 257 | |
| 258 | QQK(1,2)=QQLMAT(IDHEP(IHEP),1) |
| 259 | |
| 260 | QQP(1,1)=PHEP(1,IHEP) |
| 261 | |
| 262 | QQP(1,2)=PHEP(2,IHEP) |
| 263 | |
| 264 | QQP(1,3)=PHEP(3,IHEP) |
| 265 | |
| 266 | QQP(1,5)=AMASS(QQK(1,2)) |
| 267 | |
| 268 | QQP(1,4)=SQRT(QQP(1,5)**2+QQP(1,1)**2+QQP(1,2)**2+QQP(1,3)**2) |
| 269 | |
| 270 | C---LET QQ-CLEO DO THE JOB |
| 271 | |
| 272 | QQNTRK=0 |
| 273 | |
| 274 | NVRTX=0 |
| 275 | |
| 276 | CALL DECADD(.FALSE.) |
| 277 | |
| 278 | C---UPDATE THE HERWIG TABLE : LOOP OVER QQN-CLEO FINAL PARTICLES |
| 279 | |
| 280 | DO 40 IIHEP=1,QQN |
| 281 | |
| 282 | NHEP=NHEP+1 |
| 283 | |
| 284 | ISTHEP(NHEP)=198 |
| 285 | |
| 286 | IF(ITYPEV(IIHEP,2).GE.0) ISTHEP(NHEP)=1 |
| 287 | |
| 288 | IDHEP(NHEP)=QQLMAT(ITYPEV(IIHEP,1),2) |
| 289 | |
| 290 | CALL HWUIDT(1,IDHEP(NHEP),IDHW(NHEP),NAME) |
| 291 | |
| 292 | IF(IIHEP.EQ.1) THEN |
| 293 | |
| 294 | ISTHEP(IHEP)=199 |
| 295 | |
| 296 | JDAHEP(1,IHEP)=NHEP |
| 297 | |
| 298 | JDAHEP(2,IHEP)=NHEP |
| 299 | |
| 300 | ISTHEP(NHEP)=199 |
| 301 | |
| 302 | NHEPHF=NHEP |
| 303 | |
| 304 | JMOHEP(1,NHEP)=IHEP |
| 305 | |
| 306 | JMOHEP(2,NHEP)=IHEP |
| 307 | |
| 308 | ELSE |
| 309 | |
| 310 | JMOHEP(1,NHEP)=IPRNTV(IIHEP)+NHEPHF-1 |
| 311 | |
| 312 | JMOHEP(2,NHEP)=NHEPHF |
| 313 | |
| 314 | ENDIF |
| 315 | |
| 316 | JDAHEP(1,NHEP)=0 |
| 317 | |
| 318 | JDAHEP(2,NHEP)=0 |
| 319 | |
| 320 | IF(NDAUTV(IIHEP).GT.0) THEN |
| 321 | |
| 322 | JDAHEP(1,NHEP)=IDAUTV(IIHEP)+NHEPHF-1 |
| 323 | |
| 324 | JDAHEP(2,NHEP)=JDAHEP(1,NHEP)+NDAUTV(IIHEP)-1 |
| 325 | |
| 326 | ENDIF |
| 327 | |
| 328 | PHEP(1,NHEP)=QQP(IIHEP,1) |
| 329 | |
| 330 | PHEP(2,NHEP)=QQP(IIHEP,2) |
| 331 | |
| 332 | PHEP(3,NHEP)=QQP(IIHEP,3) |
| 333 | |
| 334 | PHEP(4,NHEP)=QQP(IIHEP,4) |
| 335 | |
| 336 | PHEP(5,NHEP)=QQP(IIHEP,5) |
| 337 | |
| 338 | VHEP(1,NHEP)=XVTX(IVPROD(IIHEP),1) |
| 339 | |
| 340 | VHEP(2,NHEP)=XVTX(IVPROD(IIHEP),2) |
| 341 | |
| 342 | VHEP(3,NHEP)=XVTX(IVPROD(IIHEP),3) |
| 343 | |
| 344 | VHEP(4,NHEP)=0. |
| 345 | |
| 346 | 40 CONTINUE |
| 347 | |
| 348 | 999 END |
| 349 | |
| 350 | CDECK ID>, HWDEUR. |
| 351 | |
| 352 | *CMZ :- -28/01/92 12.34.44 by Mike Seymour |
| 353 | |
| 354 | *-- Author : Luca Stanco |
| 355 | |
| 356 | C----------------------------------------------------------------------- |
| 357 | |
| 358 | SUBROUTINE HWDEUR(IHEP) |
| 359 | |
| 360 | C----------------------------------------------------------------------- |
| 361 | |
| 362 | C INTERFACE TO EURODEC PACKAGE (LS 10/29/91) |
| 363 | |
| 364 | C----------------------------------------------------------------------- |
| 365 | |
| 366 | INCLUDE 'HERWIG61.INC' |
| 367 | |
| 368 | INTEGER IHEP,IIHEP,NHEPHF,IEUPDG,IPDGEU |
| 369 | |
| 370 | CHARACTER*8 NAME |
| 371 | |
| 372 | C---EURODEC COMMON'S : INITIAL INPUT |
| 373 | |
| 374 | INTEGER EULUN0,EULUN1,EULUN2,EURUN,EUEVNT |
| 375 | |
| 376 | CHARACTER*4 EUDATD,EUTIT |
| 377 | |
| 378 | REAL AMINIE(12),EUWEI |
| 379 | |
| 380 | COMMON/INPOUT/EULUN0,EULUN1,EULUN2 |
| 381 | |
| 382 | COMMON/FILNAM/EUDATD,EUTIT |
| 383 | |
| 384 | COMMON/HVYINI/AMINIE |
| 385 | |
| 386 | COMMON/RUNINF/EURUN,EUEVNT,EUWEI |
| 387 | |
| 388 | C---EURODEC WORKING COMMON'S |
| 389 | |
| 390 | INTEGER NPMAX,NTMAX |
| 391 | |
| 392 | PARAMETER (NPMAX=18,NTMAX=2000) |
| 393 | |
| 394 | INTEGER EUNP,EUIP(NPMAX),EUPHEL(NPMAX),EUTEIL,EUINDX(NTMAX), |
| 395 | |
| 396 | & EUORIG(NTMAX),EUDCAY(NTMAX),EUTHEL(NTMAX) |
| 397 | |
| 398 | REAL EUAPM(NPMAX),EUPCM(5,NPMAX),EUPVTX(3,NPMAX),EUPTEI(5,NTMAX), |
| 399 | |
| 400 | & EUSECV(3,NTMAX) |
| 401 | |
| 402 | COMMON/MOMGEN/EUNP,EUIP,EUAPM,EUPCM,EUPHEL,EUPVTX |
| 403 | |
| 404 | COMMON/RESULT/EUTEIL,EUPTEI,EUINDX,EUORIG,EUDCAY,EUTHEL,EUSECV |
| 405 | |
| 406 | C---EURODEC COMMON'S FOR DECAY PROPERTIES |
| 407 | |
| 408 | INTEGER NGMAX,NCMAX |
| 409 | |
| 410 | PARAMETER (NGMAX=400,NCMAX=9000) |
| 411 | |
| 412 | INTEGER EUNPA,EUIPC(NGMAX),EUIPDG(NGMAX),EUIDP(NGMAX), |
| 413 | |
| 414 | & EUCONV(NCMAX) |
| 415 | |
| 416 | REAL EUPM(NGMAX),EUPLT(NGMAX) |
| 417 | |
| 418 | COMMON/PCTABL/EUNPA,EUIPC,EUIPDG,EUPM,EUPLT,EUIDP |
| 419 | |
| 420 | COMMON/CONVRT/EUCONV |
| 421 | |
| 422 | C--- |
| 423 | |
| 424 | IF(FSTEVT) THEN |
| 425 | |
| 426 | C---CHANGE HERE THE DEFAULT VALUES OF EURODEC COMMON'S |
| 427 | |
| 428 | C |
| 429 | |
| 430 | C---INITIALIZE EURODEC COMMON'S |
| 431 | |
| 432 | CC CALL EUDCIN |
| 433 | |
| 434 | C---INITIALIZE EURODEC |
| 435 | |
| 436 | CALL EUDINI |
| 437 | |
| 438 | ENDIF |
| 439 | |
| 440 | C---CONSTRUCT THE HADRON FOR EURODEC FROM ID1,ID2 |
| 441 | |
| 442 | EUNP=1 |
| 443 | |
| 444 | IDHEP(IHEP)=IDPDG(IDHW(IHEP)) |
| 445 | |
| 446 | EUIP(1)=IPDGEU(IDHEP(IHEP)) |
| 447 | |
| 448 | EUAPM(1)=EUPM(EUCONV(IABS(EUIP(1)))) |
| 449 | |
| 450 | EUPCM(1,1)=PHEP(1,IHEP) |
| 451 | |
| 452 | EUPCM(2,1)=PHEP(2,IHEP) |
| 453 | |
| 454 | EUPCM(3,1)=PHEP(3,IHEP) |
| 455 | |
| 456 | EUPCM(5,1)=SQRT(PHEP(1,IHEP)**2+PHEP(2,IHEP)**2+PHEP(3,IHEP)**2) |
| 457 | |
| 458 | EUPCM(4,1)=SQRT(EUPCM(5,1)**2+EUAPM(1)**2) |
| 459 | |
| 460 | C NOT POLARIZED HADRONS |
| 461 | |
| 462 | EUPHEL(1)=0 |
| 463 | |
| 464 | C HADRONS START FROM PRIMARY VERTEX |
| 465 | |
| 466 | EUPVTX(1,1)=0. |
| 467 | |
| 468 | EUPVTX(2,1)=0. |
| 469 | |
| 470 | EUPVTX(3,1)=0. |
| 471 | |
| 472 | C---LET EURODEC DO THE JOB |
| 473 | |
| 474 | EUTEIL=0 |
| 475 | |
| 476 | CALL FRAGMT(1,1,0) |
| 477 | |
| 478 | C---UPDATE THE HERWIG TABLE : LOOP OVER N-EURODEC FINAL PARTICLES |
| 479 | |
| 480 | DO 40 IIHEP=1,EUTEIL |
| 481 | |
| 482 | NHEP=NHEP+1 |
| 483 | |
| 484 | ISTHEP(NHEP)=198 |
| 485 | |
| 486 | IF(EUDCAY(IIHEP).EQ.0) ISTHEP(NHEP)=1 |
| 487 | |
| 488 | IDHEP(NHEP)=IEUPDG(EUINDX(IIHEP)) |
| 489 | |
| 490 | CALL HWUIDT(1,IDHEP(NHEP),IDHW(NHEP),NAME) |
| 491 | |
| 492 | IF(IIHEP.EQ.1) THEN |
| 493 | |
| 494 | ISTHEP(IHEP)=199 |
| 495 | |
| 496 | JDAHEP(1,IHEP)=NHEP |
| 497 | |
| 498 | JDAHEP(2,IHEP)=NHEP |
| 499 | |
| 500 | ISTHEP(NHEP)=199 |
| 501 | |
| 502 | NHEPHF=NHEP |
| 503 | |
| 504 | JMOHEP(1,NHEP)=IHEP |
| 505 | |
| 506 | JMOHEP(2,NHEP)=IHEP |
| 507 | |
| 508 | JDAHEP(1,NHEP)=EUDCAY(IIHEP)/10000+NHEPHF-1 |
| 509 | |
| 510 | JDAHEP(2,NHEP)=MOD(EUDCAY(IIHEP),10000)+NHEPHF-1 |
| 511 | |
| 512 | ELSE |
| 513 | |
| 514 | JMOHEP(1,NHEP)=MOD(EUORIG(IIHEP),10000)+NHEPHF-1 |
| 515 | |
| 516 | JMOHEP(2,NHEP)=NHEPHF |
| 517 | |
| 518 | JDAHEP(1,NHEP)=EUDCAY(IIHEP)/10000+NHEPHF-1 |
| 519 | |
| 520 | JDAHEP(2,NHEP)=MOD(EUDCAY(IIHEP),10000)+NHEPHF-1 |
| 521 | |
| 522 | ENDIF |
| 523 | |
| 524 | PHEP(1,NHEP)=EUPTEI(1,IIHEP) |
| 525 | |
| 526 | PHEP(2,NHEP)=EUPTEI(2,IIHEP) |
| 527 | |
| 528 | PHEP(3,NHEP)=EUPTEI(3,IIHEP) |
| 529 | |
| 530 | PHEP(4,NHEP)=EUPTEI(4,IIHEP) |
| 531 | |
| 532 | PHEP(5,NHEP)=EUPTEI(5,IIHEP) |
| 533 | |
| 534 | VHEP(1,NHEP)=EUSECV(1,IIHEP) |
| 535 | |
| 536 | VHEP(2,NHEP)=EUSECV(2,IIHEP) |
| 537 | |
| 538 | VHEP(3,NHEP)=EUSECV(3,IIHEP) |
| 539 | |
| 540 | VHEP(4,NHEP)=0. |
| 541 | |
| 542 | IF (IIHEP.GT.NTMAX) CALL HWWARN('HWDEUR',99,*999) |
| 543 | |
| 544 | 40 CONTINUE |
| 545 | |
| 546 | 999 END |
| 547 | |
| 548 | CDECK ID>, HWDFOR. |
| 549 | |
| 550 | *CMZ :- -01/04/99 19.52.44 by Mike Seymour |
| 551 | |
| 552 | *-- Author : Ian Knowles |
| 553 | |
| 554 | C----------------------------------------------------------------------- |
| 555 | |
| 556 | SUBROUTINE HWDFOR(P0,P1,P2,P3,P4) |
| 557 | |
| 558 | C----------------------------------------------------------------------- |
| 559 | |
| 560 | C Generates 4-body decay 0->1+2+3+4 using pure phase space |
| 561 | |
| 562 | C----------------------------------------------------------------------- |
| 563 | |
| 564 | IMPLICIT NONE |
| 565 | |
| 566 | DOUBLE PRECISION HWR,P0(5),P1(5),P2(5),P3(5),P4(5),B,C,AA,BB, |
| 567 | |
| 568 | & CC,DD,EE,TT,S1,RS1,FF,S2,PP,QQ,RR,P1CM,P234(5),P2CM,P34(5),P3CM |
| 569 | |
| 570 | DOUBLE PRECISION TWO |
| 571 | |
| 572 | PARAMETER (TWO=2.D0) |
| 573 | |
| 574 | EXTERNAL HWR |
| 575 | |
| 576 | B=P0(5)-P1(5) |
| 577 | |
| 578 | C=P2(5)+P3(5)+P4(5) |
| 579 | |
| 580 | IF (B.LT.C) CALL HWWARN('HWDFOR',100,*999) |
| 581 | |
| 582 | AA=(P0(5)+P1(5))**2 |
| 583 | |
| 584 | BB=B**2 |
| 585 | |
| 586 | CC=C**2 |
| 587 | |
| 588 | DD=(P3(5)+P4(5))**2 |
| 589 | |
| 590 | EE=(P3(5)-P4(5))**2 |
| 591 | |
| 592 | TT=(B-C)*P0(5)**7/16 |
| 593 | |
| 594 | C Select squared masses S1 and S2 of 234 and 34 subsystems |
| 595 | |
| 596 | 10 S1=BB+HWR()*(CC-BB) |
| 597 | |
| 598 | RS1=SQRT(S1) |
| 599 | |
| 600 | FF=(RS1-P2(5))**2 |
| 601 | |
| 602 | S2=DD+HWR()*(FF-DD) |
| 603 | |
| 604 | PP=(AA-S1)*(BB-S1) |
| 605 | |
| 606 | QQ=((RS1+P2(5))**2-S2)*(FF-S2)/S1 |
| 607 | |
| 608 | RR=(S2-DD)*(S2-EE)/S2 |
| 609 | |
| 610 | IF (PP*QQ*RR*(FF-DD)**2.LT.TT*S1*S2*HWR()**2) GOTO 10 |
| 611 | |
| 612 | C Do two body decays: 0-->1+234, 234-->2+34 and 34-->3+4 |
| 613 | |
| 614 | P1CM=SQRT(PP/4)/P0(5) |
| 615 | |
| 616 | P234(5)=RS1 |
| 617 | |
| 618 | P2CM=SQRT(QQ/4) |
| 619 | |
| 620 | P34(5)=SQRT(S2) |
| 621 | |
| 622 | P3CM=SQRT(RR/4) |
| 623 | |
| 624 | CALL HWDTWO(P0 ,P1,P234,P1CM,TWO,.TRUE.) |
| 625 | |
| 626 | CALL HWDTWO(P234,P2,P34 ,P2CM,TWO,.TRUE.) |
| 627 | |
| 628 | CALL HWDTWO(P34 ,P3,P4 ,P3CM,TWO,.TRUE.) |
| 629 | |
| 630 | 999 END |
| 631 | |
| 632 | CDECK ID>, HWDFIV. |
| 633 | |
| 634 | *CMZ :- -01/04/99 19.52.44 by Mike Seymour |
| 635 | |
| 636 | *-- Author : Ian Knowles |
| 637 | |
| 638 | C----------------------------------------------------------------------- |
| 639 | |
| 640 | SUBROUTINE HWDFIV(P0,P1,P2,P3,P4,P5) |
| 641 | |
| 642 | C----------------------------------------------------------------------- |
| 643 | |
| 644 | C Generates 5-body decay 0->1+2+3+4+5 using pure phase space |
| 645 | |
| 646 | C----------------------------------------------------------------------- |
| 647 | |
| 648 | IMPLICIT NONE |
| 649 | |
| 650 | DOUBLE PRECISION HWR,P0(5),P1(5),P2(5),P3(5),P4(5),P5(5),B,C, |
| 651 | |
| 652 | & AA,BB,CC,DD,EE,FF,TT,S1,RS1,GG,S2,RS2,HH,S3,PP,QQ,RR,SS,P1CM, |
| 653 | |
| 654 | & P2345(5),P2CM,P345(5),P3CM,P45(5),P4CM |
| 655 | |
| 656 | DOUBLE PRECISION TWO |
| 657 | |
| 658 | PARAMETER (TWO=2.D0) |
| 659 | |
| 660 | EXTERNAL HWR |
| 661 | |
| 662 | B=P0(5)-P1(5) |
| 663 | |
| 664 | C=P2(5)+P3(5)+P4(5)+P5(5) |
| 665 | |
| 666 | IF (B.LT.C) CALL HWWARN('HWDFIV',100,*999) |
| 667 | |
| 668 | AA=(P0(5)+P1(5))**2 |
| 669 | |
| 670 | BB=B**2 |
| 671 | |
| 672 | CC=C**2 |
| 673 | |
| 674 | DD=(P3(5)+P4(5)+P5(5))**2 |
| 675 | |
| 676 | EE=(P4(5)+P5(5))**2 |
| 677 | |
| 678 | FF=(P4(5)-P5(5))**2 |
| 679 | |
| 680 | TT=(B-C)*P0(5)**11/729 |
| 681 | |
| 682 | C Select squared masses S1, S2 and S3 of 2345, 345 and 45 subsystems |
| 683 | |
| 684 | 10 S1=BB+HWR()*(CC-BB) |
| 685 | |
| 686 | RS1=SQRT(S1) |
| 687 | |
| 688 | GG=(RS1-P2(5))**2 |
| 689 | |
| 690 | S2=DD+HWR()*(GG-DD) |
| 691 | |
| 692 | RS2=SQRT(S2) |
| 693 | |
| 694 | HH=(RS2-P3(5))**2 |
| 695 | |
| 696 | S3=EE+HWR()*(HH-EE) |
| 697 | |
| 698 | PP=(AA-S1)*(BB-S1) |
| 699 | |
| 700 | QQ=((RS1+P2(5))**2-S2)*(GG-S2)/S1 |
| 701 | |
| 702 | RR=((RS2+P3(5))**2-S3)*(HH-S3)/S2 |
| 703 | |
| 704 | SS=(S3-EE)*(S3-FF)/S3 |
| 705 | |
| 706 | IF (PP*QQ*RR*SS*((GG-DD)*(HH-EE))**2.LT.TT*S1*S2*S3*HWR()**2) |
| 707 | |
| 708 | & GOTO 10 |
| 709 | |
| 710 | C Do two body decays: 0-->1+2345, 2345-->2+345, 345-->3+45 and 45-->4+5 |
| 711 | |
| 712 | P1CM=SQRT(PP/4)/P0(5) |
| 713 | |
| 714 | P2345(5)=RS1 |
| 715 | |
| 716 | P2CM=SQRT(QQ/4) |
| 717 | |
| 718 | P345(5)=RS2 |
| 719 | |
| 720 | P3CM=SQRT(RR/4) |
| 721 | |
| 722 | P45(5)=SQRT(S3) |
| 723 | |
| 724 | P4CM=SQRT(SS/4) |
| 725 | |
| 726 | CALL HWDTWO(P0 ,P1,P2345,P1CM,TWO,.TRUE.) |
| 727 | |
| 728 | CALL HWDTWO(P2345,P2,P345 ,P2CM,TWO,.TRUE.) |
| 729 | |
| 730 | CALL HWDTWO(P345 ,P3,P45 ,P3CM,TWO,.TRUE.) |
| 731 | |
| 732 | CALL HWDTWO(P45 ,P4,P5 ,P4CM,TWO,.TRUE.) |
| 733 | |
| 734 | 999 END |
| 735 | |
| 736 | CDECK ID>, HWDHAD. |
| 737 | |
| 738 | *CMZ :- -26/04/91 14.01.26 by Federico Carminati |
| 739 | |
| 740 | *-- Author : Ian Knowles, Bryan Webber & Mike Seymour |
| 741 | |
| 742 | C----------------------------------------------------------------------- |
| 743 | |
| 744 | SUBROUTINE HWDHAD |
| 745 | |
| 746 | C----------------------------------------------------------------------- |
| 747 | |
| 748 | C GENERATES DECAYS OF UNSTABLE HADRONS AND LEPTONS |
| 749 | |
| 750 | C----------------------------------------------------------------------- |
| 751 | |
| 752 | INCLUDE 'HERWIG61.INC' |
| 753 | |
| 754 | DOUBLE PRECISION HWR,HWULDO,RN,BF,COSANG,RSUM,DIST(4),VERTX(4), |
| 755 | |
| 756 | & PMIX,WTMX,WTMX2,XS,DOT1,DOT2,HWDPWT,HWDWWT,XXX,YYY |
| 757 | |
| 758 | INTEGER IHEP,ID,MHEP,IDM,I,IDS,IM,MO,IPDG |
| 759 | |
| 760 | LOGICAL STABLE |
| 761 | |
| 762 | EXTERNAL HWR,HWDPWT,HWDWWT,HWULDO |
| 763 | |
| 764 | IF (IERROR.NE.0) RETURN |
| 765 | |
| 766 | DO 100 IHEP=1,NMXHEP |
| 767 | |
| 768 | IF (IHEP.GT.NHEP) THEN |
| 769 | |
| 770 | ISTAT=90 |
| 771 | |
| 772 | RETURN |
| 773 | |
| 774 | ELSEIF (ISTHEP(IHEP).EQ.120 .AND. |
| 775 | |
| 776 | & JDAHEP(1,IHEP).EQ.IHEP.AND.JDAHEP(2,IHEP).EQ.IHEP) THEN |
| 777 | |
| 778 | C---COPY COLOUR SINGLET CMF |
| 779 | |
| 780 | NHEP=NHEP+1 |
| 781 | |
| 782 | IF (NHEP.GT.NMXHEP) CALL HWWARN('HWDHAD',100,*999) |
| 783 | |
| 784 | CALL HWVEQU(5,PHEP(1,IHEP),PHEP(1,NHEP)) |
| 785 | |
| 786 | CALL HWVEQU(4,VHEP(1,IHEP),VHEP(1,NHEP)) |
| 787 | |
| 788 | IDHW(NHEP)=IDHW(IHEP) |
| 789 | |
| 790 | IDHEP(NHEP)=IDHEP(IHEP) |
| 791 | |
| 792 | ISTHEP(NHEP)=190 |
| 793 | |
| 794 | JMOHEP(1,NHEP)=IHEP |
| 795 | |
| 796 | JMOHEP(2,NHEP)=NHEP |
| 797 | |
| 798 | JDAHEP(2,NHEP)=NHEP |
| 799 | |
| 800 | JDAHEP(1,IHEP)=NHEP |
| 801 | |
| 802 | JDAHEP(2,IHEP)=NHEP |
| 803 | |
| 804 | ELSEIF (ISTHEP(IHEP).GE.190.AND.ISTHEP(IHEP).LE.193) THEN |
| 805 | |
| 806 | C---FIRST CHECK FOR STABILITY |
| 807 | |
| 808 | ID=IDHW(IHEP) |
| 809 | |
| 810 | IF (RSTAB(ID)) THEN |
| 811 | |
| 812 | ISTHEP(IHEP)=1 |
| 813 | |
| 814 | JDAHEP(1,IHEP)=0 |
| 815 | |
| 816 | JDAHEP(2,IHEP)=0 |
| 817 | |
| 818 | C---SPECIAL FOR GAUGE BOSON DECAY |
| 819 | |
| 820 | IF (ID.GE.198.AND.ID.LE.200) CALL HWDBOS(IHEP) |
| 821 | |
| 822 | C---SPECIAL FOR HIGGS BOSON DECAY |
| 823 | |
| 824 | IF (ID.EQ.201) CALL HWDHIG(ZERO) |
| 825 | |
| 826 | ELSE |
| 827 | |
| 828 | C---UNSTABLE. |
| 829 | |
| 830 | C Calculate position of decay vertex |
| 831 | |
| 832 | IF (DKLTM(ID).EQ.ZERO) THEN |
| 833 | |
| 834 | CALL HWVEQU(4,VHEP(1,IHEP),VERTX) |
| 835 | |
| 836 | MHEP=IHEP |
| 837 | |
| 838 | IDM=ID |
| 839 | |
| 840 | ELSE |
| 841 | |
| 842 | CALL HWUDKL(ID,PHEP(1,IHEP),DIST) |
| 843 | |
| 844 | CALL HWVSUM(4,VHEP(1,IHEP),DIST,VERTX) |
| 845 | |
| 846 | IF (MAXDKL) THEN |
| 847 | |
| 848 | CALL HWDXLM(VERTX,STABLE) |
| 849 | |
| 850 | IF (STABLE) THEN |
| 851 | |
| 852 | ISTHEP(IHEP)=1 |
| 853 | |
| 854 | JDAHEP(1,IHEP)=0 |
| 855 | |
| 856 | JDAHEP(2,IHEP)=0 |
| 857 | |
| 858 | GOTO 100 |
| 859 | |
| 860 | ENDIF |
| 861 | |
| 862 | ENDIF |
| 863 | |
| 864 | IF (MIXING.AND.(ID.EQ.221.OR.ID.EQ.223.OR. |
| 865 | |
| 866 | & ID.EQ.245.OR.ID.EQ.247)) THEN |
| 867 | |
| 868 | C Select flavour of decaying b-meson allowing for flavour oscillation |
| 869 | |
| 870 | IDS=MOD(ID,3) |
| 871 | |
| 872 | XXX=XMRCT(IDS)*DIST(4)/PHEP(4,IHEP) |
| 873 | |
| 874 | YYY=YMRCT(IDS)*DIST(4)/PHEP(4,IHEP) |
| 875 | |
| 876 | IF (ABS(YYY).LT.10) THEN |
| 877 | |
| 878 | PMIX=HALF*(ONE-COS(XXX)/COSH(YYY)) |
| 879 | |
| 880 | ELSE |
| 881 | |
| 882 | PMIX=HALF |
| 883 | |
| 884 | ENDIF |
| 885 | |
| 886 | IF (HWR().LE.PMIX) THEN |
| 887 | |
| 888 | IF (ID.LE.223) THEN |
| 889 | |
| 890 | IDM=ID+24 |
| 891 | |
| 892 | ELSE |
| 893 | |
| 894 | IDM=ID-24 |
| 895 | |
| 896 | ENDIF |
| 897 | |
| 898 | ELSE |
| 899 | |
| 900 | IDM=ID |
| 901 | |
| 902 | ENDIF |
| 903 | |
| 904 | C Introduce a decaying neutral b-meson |
| 905 | |
| 906 | IF (NHEP+1.GT.NMXHEP) CALL HWWARN('HWDHAD',101,*999) |
| 907 | |
| 908 | MHEP=NHEP+1 |
| 909 | |
| 910 | ISTHEP(MHEP)=ISTHEP(IHEP) |
| 911 | |
| 912 | ISTHEP(IHEP)=200 |
| 913 | |
| 914 | JDAHEP(1,IHEP)=MHEP |
| 915 | |
| 916 | JDAHEP(2,IHEP)=MHEP |
| 917 | |
| 918 | IDHW(MHEP)=IDM |
| 919 | |
| 920 | IDHEP(MHEP)=IDPDG(IDM) |
| 921 | |
| 922 | JMOHEP(1,MHEP)=IHEP |
| 923 | |
| 924 | JMOHEP(2,MHEP)=JMOHEP(2,IHEP) |
| 925 | |
| 926 | CALL HWVEQU(5,PHEP(1,IHEP),PHEP(1,MHEP)) |
| 927 | |
| 928 | CALL HWVEQU(4,VERTX,VHEP(1,MHEP)) |
| 929 | |
| 930 | NHEP=NHEP+1 |
| 931 | |
| 932 | ELSE |
| 933 | |
| 934 | MHEP=IHEP |
| 935 | |
| 936 | IDM=ID |
| 937 | |
| 938 | ENDIF |
| 939 | |
| 940 | ENDIF |
| 941 | |
| 942 | C Use CLEO/EURODEC packages for b-hadrons if requested |
| 943 | |
| 944 | IF ((IDM.GE.221.AND.IDM.LE.231).OR. |
| 945 | |
| 946 | & (IDM.GE.245.AND.IDM.LE.254)) THEN |
| 947 | |
| 948 | IF (BDECAY.EQ.'CLEO') THEN |
| 949 | |
| 950 | CALL HWDCLE(MHEP) |
| 951 | |
| 952 | GOTO 100 |
| 953 | |
| 954 | ELSEIF (BDECAY.EQ.'EURO') THEN |
| 955 | |
| 956 | CALL HWDEUR(MHEP) |
| 957 | |
| 958 | GOTO 100 |
| 959 | |
| 960 | ENDIF |
| 961 | |
| 962 | ENDIF |
| 963 | |
| 964 | C Choose decay mode |
| 965 | |
| 966 | ISTHEP(MHEP)=ISTHEP(MHEP)+5 |
| 967 | |
| 968 | RN=HWR() |
| 969 | |
| 970 | BF=0. |
| 971 | |
| 972 | IM=LSTRT(IDM) |
| 973 | |
| 974 | DO 10 I=1,NMODES(IDM) |
| 975 | |
| 976 | BF=BF+BRFRAC(IM) |
| 977 | |
| 978 | IF (BF.GE.RN) GOTO 20 |
| 979 | |
| 980 | 10 IM=LNEXT(IM) |
| 981 | |
| 982 | CALL HWWARN('HWDHAD',50,*20) |
| 983 | |
| 984 | 20 IF ((IDKPRD(1,IM).GE.1.AND.IDKPRD(1,IM).LE.13).OR. |
| 985 | |
| 986 | & (IDKPRD(3,IM).GE.1.AND.IDKPRD(3,IM).LE.13)) THEN |
| 987 | |
| 988 | C Partonic decay of a heavy-(b,c)-hadron, store details |
| 989 | |
| 990 | NQDK=NQDK+1 |
| 991 | |
| 992 | IF (NQDK.GT.NMXQDK) CALL HWWARN('HWDHAD',102,*999) |
| 993 | |
| 994 | LOCQ(NQDK)=MHEP |
| 995 | |
| 996 | IMQDK(NQDK)=IM |
| 997 | |
| 998 | CALL HWVEQU(4,VERTX,VTXQDK(1,NQDK)) |
| 999 | |
| 1000 | GOTO 100 |
| 1001 | |
| 1002 | ELSE |
| 1003 | |
| 1004 | C Exclusive decay, add decay products to event record |
| 1005 | |
| 1006 | IF (NHEP+NPRODS(IM).GT.NMXHEP) |
| 1007 | |
| 1008 | & CALL HWWARN('HWDHAD',103,*999) |
| 1009 | |
| 1010 | JDAHEP(1,MHEP)=NHEP+1 |
| 1011 | |
| 1012 | DO 30 I=1,NPRODS(IM) |
| 1013 | |
| 1014 | NHEP=NHEP+1 |
| 1015 | |
| 1016 | IDHW(NHEP)=IDKPRD(I,IM) |
| 1017 | |
| 1018 | IDHEP(NHEP)=IDPDG(IDKPRD(I,IM)) |
| 1019 | |
| 1020 | ISTHEP(NHEP)=193 |
| 1021 | |
| 1022 | JMOHEP(1,NHEP)=MHEP |
| 1023 | |
| 1024 | JMOHEP(2,NHEP)=JMOHEP(2,MHEP) |
| 1025 | |
| 1026 | PHEP(5,NHEP)=RMASS(IDKPRD(I,IM)) |
| 1027 | |
| 1028 | 30 CALL HWVEQU(4,VERTX,VHEP(1,NHEP)) |
| 1029 | |
| 1030 | JDAHEP(2,MHEP)=NHEP |
| 1031 | |
| 1032 | ENDIF |
| 1033 | |
| 1034 | C Next choose momenta: |
| 1035 | |
| 1036 | IF (NPRODS(IM).EQ.1) THEN |
| 1037 | |
| 1038 | C 1-body decay: K0(BR) --> K0S,K0L |
| 1039 | |
| 1040 | CALL HWVEQU(4,PHEP(1,MHEP),PHEP(1,NHEP)) |
| 1041 | |
| 1042 | ELSEIF (NPRODS(IM).EQ.2) THEN |
| 1043 | |
| 1044 | C 2-body decay |
| 1045 | |
| 1046 | C---SPECIAL TREATMENT OF POLARIZED MESONS |
| 1047 | |
| 1048 | COSANG=TWO |
| 1049 | |
| 1050 | IF (ID.EQ.IDHW(JMOHEP(1,MHEP))) THEN |
| 1051 | |
| 1052 | MO=JMOHEP(1,MHEP) |
| 1053 | |
| 1054 | RSUM=0 |
| 1055 | |
| 1056 | DO 40 I=1,3 |
| 1057 | |
| 1058 | 40 RSUM=RSUM+RHOHEP(I,MO) |
| 1059 | |
| 1060 | IF (RSUM.GT.ZERO) THEN |
| 1061 | |
| 1062 | RSUM=RSUM*HWR() |
| 1063 | |
| 1064 | IF (RSUM.LT.RHOHEP(1,MO)) THEN |
| 1065 | |
| 1066 | C---(1+COSANG)**2 |
| 1067 | |
| 1068 | COSANG=MAX(HWR(),HWR(),HWR())*TWO-ONE |
| 1069 | |
| 1070 | ELSEIF (RSUM.LT.RHOHEP(1,MO)+RHOHEP(2,MO)) THEN |
| 1071 | |
| 1072 | C---1-COSANG**2 |
| 1073 | |
| 1074 | COSANG=2*COS((ACOS(HWR()*TWO-ONE)+PIFAC)/THREE) |
| 1075 | |
| 1076 | ELSE |
| 1077 | |
| 1078 | C---(1-COSANG)**2 |
| 1079 | |
| 1080 | COSANG=MIN(HWR(),HWR(),HWR())*TWO-ONE |
| 1081 | |
| 1082 | ENDIF |
| 1083 | |
| 1084 | ENDIF |
| 1085 | |
| 1086 | ENDIF |
| 1087 | |
| 1088 | CALL HWDTWO(PHEP(1,MHEP),PHEP(1,NHEP-1), |
| 1089 | |
| 1090 | & PHEP(1,NHEP),CMMOM(IM),COSANG,.FALSE.) |
| 1091 | |
| 1092 | ELSEIF (NPRODS(IM).EQ.3) THEN |
| 1093 | |
| 1094 | C 3-body decay |
| 1095 | |
| 1096 | IF (NME(IM).EQ.100) THEN |
| 1097 | |
| 1098 | C Use free massless (V-A)*(V-A) Matrix Element |
| 1099 | |
| 1100 | CALL HWDTHR(PHEP(1,MHEP),PHEP(1,NHEP-1),PHEP(1,NHEP-2), |
| 1101 | |
| 1102 | & PHEP(1,NHEP),HWDWWT) |
| 1103 | |
| 1104 | ELSEIF (NME(IM).EQ.101) THEN |
| 1105 | |
| 1106 | C Use bound massless (V-A)*(V-A) Matrix Element |
| 1107 | |
| 1108 | WTMX=((PHEP(5,MHEP)-PHEP(5,NHEP)) |
| 1109 | |
| 1110 | & *(PHEP(5,MHEP)+PHEP(5,NHEP)) |
| 1111 | |
| 1112 | & +(PHEP(5,NHEP-1)-PHEP(5,NHEP-2)) |
| 1113 | |
| 1114 | & *(PHEP(5,NHEP-1)+PHEP(5,NHEP-2)))/TWO |
| 1115 | |
| 1116 | WTMX2=WTMX**2 |
| 1117 | |
| 1118 | IPDG=ABS(IDHEP(MHEP)) |
| 1119 | |
| 1120 | XS=ONE-MAX(RMASS(MOD(IPDG/1000,10)), |
| 1121 | |
| 1122 | & RMASS(MOD(IPDG/100,10)),RMASS(MOD(IPDG/10,10))) |
| 1123 | |
| 1124 | & /(RMASS(MOD(IPDG/1000,10))+RMASS(MOD(IPDG/100,10)) |
| 1125 | |
| 1126 | & +RMASS(MOD(IPDG/10,10))) |
| 1127 | |
| 1128 | 50 CALL HWDTHR(PHEP(1,MHEP),PHEP(1,NHEP-1),PHEP(1,NHEP-2), |
| 1129 | |
| 1130 | & PHEP(1,NHEP),HWDWWT) |
| 1131 | |
| 1132 | DOT1=HWULDO(PHEP(1,MHEP),PHEP(1,NHEP-1)) |
| 1133 | |
| 1134 | DOT2=HWULDO(PHEP(1,MHEP),PHEP(1,NHEP-2)) |
| 1135 | |
| 1136 | IF (DOT1*(WTMX-DOT1-XS*DOT2).LT.HWR()*WTMX2) GOTO 50 |
| 1137 | |
| 1138 | ELSE |
| 1139 | |
| 1140 | CALL HWDTHR(PHEP(1,MHEP),PHEP(1,NHEP-2),PHEP(1,NHEP-1), |
| 1141 | |
| 1142 | & PHEP(1,NHEP),HWDPWT) |
| 1143 | |
| 1144 | ENDIF |
| 1145 | |
| 1146 | ELSEIF (NPRODS(IM).EQ.4) THEN |
| 1147 | |
| 1148 | C 4-body decay |
| 1149 | |
| 1150 | CALL HWDFOR(PHEP(1,MHEP ),PHEP(1,NHEP-3),PHEP(1,NHEP-2), |
| 1151 | |
| 1152 | & PHEP(1,NHEP-1),PHEP(1,NHEP)) |
| 1153 | |
| 1154 | ELSEIF (NPRODS(IM).EQ.5) THEN |
| 1155 | |
| 1156 | C 5-body decay |
| 1157 | |
| 1158 | CALL HWDFIV(PHEP(1,MHEP ),PHEP(1,NHEP-4),PHEP(1,NHEP-3), |
| 1159 | |
| 1160 | & PHEP(1,NHEP-2),PHEP(1,NHEP-1),PHEP(1,NHEP)) |
| 1161 | |
| 1162 | ELSE |
| 1163 | |
| 1164 | CALL HWWARN('HWDHAD',104,*999) |
| 1165 | |
| 1166 | ENDIF |
| 1167 | |
| 1168 | ENDIF |
| 1169 | |
| 1170 | ENDIF |
| 1171 | |
| 1172 | 100 CONTINUE |
| 1173 | |
| 1174 | C---MAY HAVE OVERFLOWED /HEPEVT/ |
| 1175 | |
| 1176 | CALL HWWARN('HWDHAD',105,*999) |
| 1177 | |
| 1178 | 999 END |
| 1179 | |
| 1180 | CDECK ID>, HWDHGC. |
| 1181 | |
| 1182 | *CMZ :- -26/04/91 11.11.55 by Bryan Webber |
| 1183 | |
| 1184 | *-- Author : Mike Seymour |
| 1185 | |
| 1186 | C----------------------------------------------------------------------- |
| 1187 | |
| 1188 | SUBROUTINE HWDHGC(TAU,FNREAL,FNIMAG) |
| 1189 | |
| 1190 | C----------------------------------------------------------------------- |
| 1191 | |
| 1192 | C CALCULATE THE COMPLEX FUNCTION F OF HHG eq 2.18 |
| 1193 | |
| 1194 | C FOR USE IN H-->GAMMGAMM DECAYS |
| 1195 | |
| 1196 | C----------------------------------------------------------------------- |
| 1197 | |
| 1198 | INCLUDE 'HERWIG61.INC' |
| 1199 | |
| 1200 | DOUBLE PRECISION TAU,FNREAL,FNIMAG,FNLOG,FNSQR |
| 1201 | |
| 1202 | IF (TAU.GT.ONE) THEN |
| 1203 | |
| 1204 | FNREAL=(ASIN(1/SQRT(TAU)))**2 |
| 1205 | |
| 1206 | FNIMAG=0 |
| 1207 | |
| 1208 | ELSEIF (TAU.LT.ONE) THEN |
| 1209 | |
| 1210 | FNSQR=SQRT(1-TAU) |
| 1211 | |
| 1212 | FNLOG=LOG((1+FNSQR)/(1-FNSQR)) |
| 1213 | |
| 1214 | FNREAL=-0.25 * (FNLOG**2 - PIFAC**2) |
| 1215 | |
| 1216 | FNIMAG= 0.5 * PIFAC*FNLOG |
| 1217 | |
| 1218 | ELSE |
| 1219 | |
| 1220 | FNREAL=0.25*PIFAC**2 |
| 1221 | |
| 1222 | FNIMAG=0 |
| 1223 | |
| 1224 | ENDIF |
| 1225 | |
| 1226 | END |
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