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Commit | Line | Data |
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e74335a4 | 1 | * $Id$ |
2 | ||
3 | C*********************************************************************** | |
4 | ||
5 | SUBROUTINE PYSIGH_HIJING(NCHN,SIGS) | |
6 | ||
7 | C...Differential matrix elements for all included subprocesses. | |
8 | C...Note that what is coded is (disregarding the COMFAC factor) | |
9 | C...1) for 2 -> 1 processes: s-hat/pi*d(sigma-hat), where, | |
10 | C...when d(sigma-hat) is given in the zero-width limit, the delta | |
11 | C...function in tau is replaced by a Breit-Wigner: | |
12 | C...1/pi*(s*m_res*Gamma_res)/((s*tau-m_res^2)^2+(m_res*Gamma_res)^2); | |
13 | C...2) for 2 -> 2 processes: (s-hat)**2/pi*d(sigma-hat)/d(t-hat); | |
14 | C...i.e., dimensionless quantities. COMFAC contains the factor | |
15 | C...pi/s and the conversion factor from GeV^-2 to mb. | |
16 | #include "ludat1_hijing.inc" | |
17 | #include "ludat2_hijing.inc" | |
18 | #include "ludat3_hijing.inc" | |
19 | #include "pysubs_hijing.inc" | |
20 | #include "pypars_hijing.inc" | |
21 | #include "pyint1_hijing.inc" | |
22 | #include "pyint2_hijing.inc" | |
23 | #include "pyint3_hijing.inc" | |
24 | #include "pyint4_hijing.inc" | |
25 | #include "pyint5_hijing.inc" | |
26 | DIMENSION X(2),XPQ(-6:6),KFAC(2,-40:40),WDTP(0:40),WDTE(0:40,0:5) | |
27 | ||
28 | C...Reset number of channels and cross-section. | |
29 | NCHN=0 | |
30 | SIGS=0. | |
31 | ||
32 | C...Read kinematical variables and limits. | |
33 | ISUB=MINT(1) | |
34 | TAUMIN=VINT(11) | |
35 | YSTMIN=VINT(12) | |
36 | CTNMIN=VINT(13) | |
37 | CTPMIN=VINT(14) | |
38 | XT2MIN=VINT(15) | |
39 | TAUPMN=VINT(16) | |
40 | TAU=VINT(21) | |
41 | YST=VINT(22) | |
42 | CTH=VINT(23) | |
43 | XT2=VINT(25) | |
44 | TAUP=VINT(26) | |
45 | TAUMAX=VINT(31) | |
46 | YSTMAX=VINT(32) | |
47 | CTNMAX=VINT(33) | |
48 | CTPMAX=VINT(34) | |
49 | XT2MAX=VINT(35) | |
50 | TAUPMX=VINT(36) | |
51 | ||
52 | C...Derive kinematical quantities. | |
53 | IF(ISET(ISUB).LE.2.OR.ISET(ISUB).EQ.5) THEN | |
54 | X(1)=SQRT(TAU)*EXP(YST) | |
55 | X(2)=SQRT(TAU)*EXP(-YST) | |
56 | ELSE | |
57 | X(1)=SQRT(TAUP)*EXP(YST) | |
58 | X(2)=SQRT(TAUP)*EXP(-YST) | |
59 | ENDIF | |
60 | IF(MINT(43).EQ.4.AND.ISET(ISUB).GE.1.AND. | |
61 | &(X(1).GT.0.999.OR.X(2).GT.0.999)) RETURN | |
62 | SH=TAU*VINT(2) | |
63 | SQM3=VINT(63) | |
64 | SQM4=VINT(64) | |
65 | RM3=SQM3/SH | |
66 | RM4=SQM4/SH | |
67 | BE34=SQRT((1.-RM3-RM4)**2-4.*RM3*RM4) | |
68 | RPTS=4.*VINT(71)**2/SH | |
69 | BE34L=SQRT(MAX(0.,(1.-RM3-RM4)**2-4.*RM3*RM4-RPTS)) | |
70 | RM34=2.*RM3*RM4 | |
71 | RSQM=1.+RM34 | |
72 | RTHM=(4.*RM3*RM4+RPTS)/(1.-RM3-RM4+BE34L) | |
73 | TH=-0.5*SH*MAX(RTHM,1.-RM3-RM4-BE34*CTH) | |
74 | UH=-0.5*SH*MAX(RTHM,1.-RM3-RM4+BE34*CTH) | |
75 | SQPTH=0.25*SH*BE34**2*(1.-CTH**2) | |
76 | SH2=SH**2 | |
77 | TH2=TH**2 | |
78 | UH2=UH**2 | |
79 | ||
80 | C...Choice of Q2 scale. | |
81 | IF(ISET(ISUB).EQ.1.OR.ISET(ISUB).EQ.3) THEN | |
82 | Q2=SH | |
83 | ELSEIF(MOD(ISET(ISUB),2).EQ.0.OR.ISET(ISUB).EQ.5) THEN | |
84 | IF(MSTP(32).EQ.1) THEN | |
85 | Q2=2.*SH*TH*UH/(SH**2+TH**2+UH**2) | |
86 | ELSEIF(MSTP(32).EQ.2) THEN | |
87 | Q2=SQPTH+0.5*(SQM3+SQM4) | |
88 | ELSEIF(MSTP(32).EQ.3) THEN | |
89 | Q2=MIN(-TH,-UH) | |
90 | ELSEIF(MSTP(32).EQ.4) THEN | |
91 | Q2=SH | |
92 | ENDIF | |
93 | IF(ISET(ISUB).EQ.5.AND.MSTP(82).GE.2) Q2=Q2+PARP(82)**2 | |
94 | ENDIF | |
95 | ||
96 | C...Store derived kinematical quantities. | |
97 | VINT(41)=X(1) | |
98 | VINT(42)=X(2) | |
99 | VINT(44)=SH | |
100 | VINT(43)=SQRT(SH) | |
101 | VINT(45)=TH | |
102 | VINT(46)=UH | |
103 | VINT(48)=SQPTH | |
104 | VINT(47)=SQRT(SQPTH) | |
105 | VINT(50)=TAUP*VINT(2) | |
106 | VINT(49)=SQRT(MAX(0.,VINT(50))) | |
107 | VINT(52)=Q2 | |
108 | VINT(51)=SQRT(Q2) | |
109 | ||
110 | C...Calculate parton structure functions. | |
111 | IF(ISET(ISUB).LE.0) GOTO 145 | |
112 | IF(MINT(43).GE.2) THEN | |
113 | Q2SF=Q2 | |
114 | IF(ISET(ISUB).EQ.3.OR.ISET(ISUB).EQ.4) THEN | |
115 | Q2SF=PMAS(23,1)**2 | |
116 | IF(ISUB.EQ.8.OR.ISUB.EQ.76.OR.ISUB.EQ.77) Q2SF=PMAS(24,1)**2 | |
117 | ENDIF | |
118 | DO 100 I=3-MINT(41),MINT(42) | |
119 | XSF=X(I) | |
120 | IF(ISET(ISUB).EQ.5) XSF=X(I)/VINT(142+I) | |
121 | CALL PYSTFU_HIJING(MINT(10+I),XSF,Q2SF,XPQ,I) | |
122 | DO 100 KFL=-6,6 | |
123 | 100 XSFX(I,KFL)=XPQ(KFL) | |
124 | ENDIF | |
125 | ||
126 | C...Calculate alpha_strong and K-factor. | |
127 | IF(MSTP(33).NE.3) AS=ULALPS_HIJING(Q2) | |
128 | FACK=1. | |
129 | FACA=1. | |
130 | IF(MSTP(33).EQ.1) THEN | |
131 | FACK=PARP(31) | |
132 | ELSEIF(MSTP(33).EQ.2) THEN | |
133 | FACK=PARP(31) | |
134 | FACA=PARP(32)/PARP(31) | |
135 | ELSEIF(MSTP(33).EQ.3) THEN | |
136 | Q2AS=PARP(33)*Q2 | |
137 | IF(ISET(ISUB).EQ.5.AND.MSTP(82).GE.2) Q2AS=Q2AS+ | |
138 | & PARU(112)*PARP(82) | |
139 | AS=ULALPS_HIJING(Q2AS) | |
140 | ENDIF | |
141 | RADC=1.+AS/PARU(1) | |
142 | ||
143 | C...Set flags for allowed reacting partons/leptons. | |
144 | DO 130 I=1,2 | |
145 | DO 110 J=-40,40 | |
146 | 110 KFAC(I,J)=0 | |
147 | IF(MINT(40+I).EQ.1) THEN | |
148 | KFAC(I,MINT(10+I))=1 | |
149 | ELSE | |
150 | DO 120 J=-40,40 | |
151 | KFAC(I,J)=KFIN(I,J) | |
152 | IF(ABS(J).GT.MSTP(54).AND.J.NE.21) KFAC(I,J)=0 | |
153 | IF(ABS(J).LE.6) THEN | |
154 | IF(XSFX(I,J).LT.1.E-10) KFAC(I,J)=0 | |
155 | ELSEIF(J.EQ.21) THEN | |
156 | IF(XSFX(I,0).LT.1.E-10) KFAC(I,21)=0 | |
157 | ENDIF | |
158 | 120 CONTINUE | |
159 | ENDIF | |
160 | 130 CONTINUE | |
161 | ||
162 | C...Lower and upper limit for flavour loops. | |
163 | MIN1=0 | |
164 | MAX1=0 | |
165 | MIN2=0 | |
166 | MAX2=0 | |
167 | DO 140 J=-20,20 | |
168 | IF(KFAC(1,-J).EQ.1) MIN1=-J | |
169 | IF(KFAC(1,J).EQ.1) MAX1=J | |
170 | IF(KFAC(2,-J).EQ.1) MIN2=-J | |
171 | IF(KFAC(2,J).EQ.1) MAX2=J | |
172 | 140 CONTINUE | |
173 | MINA=MIN(MIN1,MIN2) | |
174 | MAXA=MAX(MAX1,MAX2) | |
175 | ||
176 | C...Common conversion factors (including Jacobian) for subprocesses. | |
177 | SQMZ=PMAS(23,1)**2 | |
178 | GMMZ=PMAS(23,1)*PMAS(23,2) | |
179 | SQMW=PMAS(24,1)**2 | |
180 | GMMW=PMAS(24,1)*PMAS(24,2) | |
181 | SQMH=PMAS(25,1)**2 | |
182 | GMMH=PMAS(25,1)*PMAS(25,2) | |
183 | SQMZP=PMAS(32,1)**2 | |
184 | GMMZP=PMAS(32,1)*PMAS(32,2) | |
185 | SQMHC=PMAS(37,1)**2 | |
186 | GMMHC=PMAS(37,1)*PMAS(37,2) | |
187 | SQMR=PMAS(40,1)**2 | |
188 | GMMR=PMAS(40,1)*PMAS(40,2) | |
189 | AEM=PARU(101) | |
190 | XW=PARU(102) | |
191 | ||
192 | C...Phase space integral in tau and y*. | |
193 | COMFAC=PARU(1)*PARU(5)/VINT(2) | |
194 | IF(MINT(43).EQ.4) COMFAC=COMFAC*FACK | |
195 | IF((MINT(43).GE.2.OR.ISET(ISUB).EQ.3.OR.ISET(ISUB).EQ.4).AND. | |
196 | &ISET(ISUB).NE.5) THEN | |
197 | ATAU0=LOG(TAUMAX/TAUMIN) | |
198 | ATAU1=(TAUMAX-TAUMIN)/(TAUMAX*TAUMIN) | |
199 | H1=COEF(ISUB,1)+(ATAU0/ATAU1)*COEF(ISUB,2)/TAU | |
200 | IF(MINT(72).GE.1) THEN | |
201 | TAUR1=VINT(73) | |
202 | GAMR1=VINT(74) | |
203 | ATAU2=LOG(TAUMAX/TAUMIN*(TAUMIN+TAUR1)/(TAUMAX+TAUR1))/TAUR1 | |
204 | ATAU3=(ATAN((TAUMAX-TAUR1)/GAMR1)-ATAN((TAUMIN-TAUR1)/GAMR1))/ | |
205 | & GAMR1 | |
206 | H1=H1+(ATAU0/ATAU2)*COEF(ISUB,3)/(TAU+TAUR1)+ | |
207 | & (ATAU0/ATAU3)*COEF(ISUB,4)*TAU/((TAU-TAUR1)**2+GAMR1**2) | |
208 | ENDIF | |
209 | IF(MINT(72).EQ.2) THEN | |
210 | TAUR2=VINT(75) | |
211 | GAMR2=VINT(76) | |
212 | ATAU4=LOG(TAUMAX/TAUMIN*(TAUMIN+TAUR2)/(TAUMAX+TAUR2))/TAUR2 | |
213 | ATAU5=(ATAN((TAUMAX-TAUR2)/GAMR2)-ATAN((TAUMIN-TAUR2)/GAMR2))/ | |
214 | & GAMR2 | |
215 | H1=H1+(ATAU0/ATAU4)*COEF(ISUB,5)/(TAU+TAUR2)+ | |
216 | & (ATAU0/ATAU5)*COEF(ISUB,6)*TAU/((TAU-TAUR2)**2+GAMR2**2) | |
217 | ENDIF | |
218 | COMFAC=COMFAC*ATAU0/(TAU*H1) | |
219 | ENDIF | |
220 | IF(MINT(43).EQ.4.AND.ISET(ISUB).NE.5) THEN | |
221 | AYST0=YSTMAX-YSTMIN | |
222 | AYST1=0.5*(YSTMAX-YSTMIN)**2 | |
223 | AYST2=AYST1 | |
224 | AYST3=2.*(ATAN(EXP(YSTMAX))-ATAN(EXP(YSTMIN))) | |
225 | H2=(AYST0/AYST1)*COEF(ISUB,7)*(YST-YSTMIN)+(AYST0/AYST2)* | |
226 | & COEF(ISUB,8)*(YSTMAX-YST)+(AYST0/AYST3)*COEF(ISUB,9)/COSH(YST) | |
227 | COMFAC=COMFAC*AYST0/H2 | |
228 | ENDIF | |
229 | ||
230 | C...2 -> 1 processes: reduction in angular part of phase space integral | |
231 | C...for case of decaying resonance. | |
232 | ACTH0=CTNMAX-CTNMIN+CTPMAX-CTPMIN | |
233 | IF((ISET(ISUB).EQ.1.OR.ISET(ISUB).EQ.3).AND. | |
234 | &MDCY(KFPR(ISUB,1),1).EQ.1) THEN | |
235 | IF(KFPR(ISUB,1).EQ.25.OR.KFPR(ISUB,1).EQ.37) THEN | |
236 | COMFAC=COMFAC*0.5*ACTH0 | |
237 | ELSE | |
238 | COMFAC=COMFAC*0.125*(3.*ACTH0+CTNMAX**3-CTNMIN**3+ | |
239 | & CTPMAX**3-CTPMIN**3) | |
240 | ENDIF | |
241 | ||
242 | C...2 -> 2 processes: angular part of phase space integral. | |
243 | ELSEIF(ISET(ISUB).EQ.2.OR.ISET(ISUB).EQ.4) THEN | |
244 | ACTH1=LOG((MAX(RM34,RSQM-CTNMIN)*MAX(RM34,RSQM-CTPMIN))/ | |
245 | & (MAX(RM34,RSQM-CTNMAX)*MAX(RM34,RSQM-CTPMAX))) | |
246 | ACTH2=LOG((MAX(RM34,RSQM+CTNMAX)*MAX(RM34,RSQM+CTPMAX))/ | |
247 | & (MAX(RM34,RSQM+CTNMIN)*MAX(RM34,RSQM+CTPMIN))) | |
248 | ACTH3=1./MAX(RM34,RSQM-CTNMAX)-1./MAX(RM34,RSQM-CTNMIN)+ | |
249 | & 1./MAX(RM34,RSQM-CTPMAX)-1./MAX(RM34,RSQM-CTPMIN) | |
250 | ACTH4=1./MAX(RM34,RSQM+CTNMIN)-1./MAX(RM34,RSQM+CTNMAX)+ | |
251 | & 1./MAX(RM34,RSQM+CTPMIN)-1./MAX(RM34,RSQM+CTPMAX) | |
252 | H3=COEF(ISUB,10)+ | |
253 | & (ACTH0/ACTH1)*COEF(ISUB,11)/MAX(RM34,RSQM-CTH)+ | |
254 | & (ACTH0/ACTH2)*COEF(ISUB,12)/MAX(RM34,RSQM+CTH)+ | |
255 | & (ACTH0/ACTH3)*COEF(ISUB,13)/MAX(RM34,RSQM-CTH)**2+ | |
256 | & (ACTH0/ACTH4)*COEF(ISUB,14)/MAX(RM34,RSQM+CTH)**2 | |
257 | COMFAC=COMFAC*ACTH0*0.5*BE34/H3 | |
258 | ENDIF | |
259 | ||
260 | C...2 -> 3, 4 processes: phace space integral in tau'. | |
261 | IF(MINT(43).GE.2.AND.(ISET(ISUB).EQ.3.OR.ISET(ISUB).EQ.4)) THEN | |
262 | ATAUP0=LOG(TAUPMX/TAUPMN) | |
263 | ATAUP1=((1.-TAU/TAUPMX)**4-(1.-TAU/TAUPMN)**4)/(4.*TAU) | |
264 | H4=COEF(ISUB,15)+ | |
265 | & ATAUP0/ATAUP1*COEF(ISUB,16)/TAUP*(1.-TAU/TAUP)**3 | |
266 | IF(1.-TAU/TAUP.GT.1.E-4) THEN | |
267 | FZW=(1.+TAU/TAUP)*LOG(TAUP/TAU)-2.*(1.-TAU/TAUP) | |
268 | ELSE | |
269 | FZW=1./6.*(1.-TAU/TAUP)**3*TAU/TAUP | |
270 | ENDIF | |
271 | COMFAC=COMFAC*ATAUP0*FZW/H4 | |
272 | ENDIF | |
273 | ||
274 | C...Phase space integral for low-pT and multiple interactions. | |
275 | IF(ISET(ISUB).EQ.5) THEN | |
276 | COMFAC=PARU(1)*PARU(5)*FACK*0.5*VINT(2)/SH2 | |
277 | ATAU0=LOG(2.*(1.+SQRT(1.-XT2))/XT2-1.) | |
278 | ATAU1=2.*ATAN(1./XT2-1.)/SQRT(XT2) | |
279 | H1=COEF(ISUB,1)+(ATAU0/ATAU1)*COEF(ISUB,2)/SQRT(TAU) | |
280 | COMFAC=COMFAC*ATAU0/H1 | |
281 | AYST0=YSTMAX-YSTMIN | |
282 | AYST1=0.5*(YSTMAX-YSTMIN)**2 | |
283 | AYST3=2.*(ATAN(EXP(YSTMAX))-ATAN(EXP(YSTMIN))) | |
284 | H2=(AYST0/AYST1)*COEF(ISUB,7)*(YST-YSTMIN)+(AYST0/AYST1)* | |
285 | & COEF(ISUB,8)*(YSTMAX-YST)+(AYST0/AYST3)*COEF(ISUB,9)/COSH(YST) | |
286 | COMFAC=COMFAC*AYST0/H2 | |
287 | IF(MSTP(82).LE.1) COMFAC=COMFAC*XT2**2*(1./VINT(149)-1.) | |
288 | C...For MSTP(82)>=2 an additional factor (xT2/(xT2+VINT(149))**2 is | |
289 | C...introduced to make cross-section finite for xT2 -> 0. | |
290 | IF(MSTP(82).GE.2) COMFAC=COMFAC*XT2**2/(VINT(149)* | |
291 | & (1.+VINT(149))) | |
292 | ENDIF | |
293 | ||
294 | C...A: 2 -> 1, tree diagrams. | |
295 | ||
296 | 145 IF(ISUB.LE.10) THEN | |
297 | IF(ISUB.EQ.1) THEN | |
298 | C...f + fb -> gamma*/Z0. | |
299 | MINT(61)=2 | |
300 | CALL PYWIDT_HIJING(23,SQRT(SH),WDTP,WDTE) | |
301 | FACZ=COMFAC*AEM**2*4./3. | |
302 | DO 150 I=MINA,MAXA | |
303 | IF(I.EQ.0.OR.KFAC(1,I)*KFAC(2,-I).EQ.0) GOTO 150 | |
304 | EI=KCHG(IABS(I),1)/3. | |
305 | AI=SIGN(1.,EI) | |
306 | VI=AI-4.*EI*XW | |
307 | FACF=1. | |
308 | IF(IABS(I).LE.10) FACF=FACA/3. | |
309 | NCHN=NCHN+1 | |
310 | ISIG(NCHN,1)=I | |
311 | ISIG(NCHN,2)=-I | |
312 | ISIG(NCHN,3)=1 | |
313 | SIGH(NCHN)=FACF*FACZ*(EI**2*VINT(111)+EI*VI/(8.*XW*(1.-XW))* | |
314 | & SH*(SH-SQMZ)/((SH-SQMZ)**2+GMMZ**2)*VINT(112)+(VI**2+AI**2)/ | |
315 | & (16.*XW*(1.-XW))**2*SH2/((SH-SQMZ)**2+GMMZ**2)*VINT(114)) | |
316 | 150 CONTINUE | |
317 | ||
318 | ELSEIF(ISUB.EQ.2) THEN | |
319 | C...f + fb' -> W+/-. | |
320 | CALL PYWIDT_HIJING(24,SQRT(SH),WDTP,WDTE) | |
321 | FACW=COMFAC*(AEM/XW)**2*1./24*SH2/((SH-SQMW)**2+GMMW**2) | |
322 | DO 170 I=MIN1,MAX1 | |
323 | IF(I.EQ.0.OR.KFAC(1,I).EQ.0) GOTO 170 | |
324 | IA=IABS(I) | |
325 | DO 160 J=MIN2,MAX2 | |
326 | IF(J.EQ.0.OR.KFAC(2,J).EQ.0) GOTO 160 | |
327 | JA=IABS(J) | |
328 | IF(I*J.GT.0.OR.MOD(IA+JA,2).EQ.0) GOTO 160 | |
329 | IF((IA.LE.10.AND.JA.GT.10).OR.(IA.GT.10.AND.JA.LE.10)) GOTO 160 | |
330 | KCHW=(KCHG(IA,1)*ISIGN(1,I)+KCHG(JA,1)*ISIGN(1,J))/3 | |
331 | FACF=1. | |
332 | IF(IA.LE.10) FACF=VCKM((IA+1)/2,(JA+1)/2)*FACA/3. | |
333 | NCHN=NCHN+1 | |
334 | ISIG(NCHN,1)=I | |
335 | ISIG(NCHN,2)=J | |
336 | ISIG(NCHN,3)=1 | |
337 | SIGH(NCHN)=FACF*FACW*(WDTE(0,1)+WDTE(0,(5-KCHW)/2)+WDTE(0,4)) | |
338 | 160 CONTINUE | |
339 | 170 CONTINUE | |
340 | ||
341 | ELSEIF(ISUB.EQ.3) THEN | |
342 | C...f + fb -> H0. | |
343 | CALL PYWIDT_HIJING(25,SQRT(SH),WDTP,WDTE) | |
344 | FACH=COMFAC*(AEM/XW)**2*1./48.*(SH/SQMW)**2* | |
345 | & SH2/((SH-SQMH)**2+GMMH**2)*(WDTE(0,1)+WDTE(0,2)+WDTE(0,4)) | |
346 | DO 180 I=MINA,MAXA | |
347 | IF(I.EQ.0.OR.KFAC(1,I)*KFAC(2,-I).EQ.0) GOTO 180 | |
348 | RMQ=PMAS(IABS(I),1)**2/SH | |
349 | NCHN=NCHN+1 | |
350 | ISIG(NCHN,1)=I | |
351 | ISIG(NCHN,2)=-I | |
352 | ISIG(NCHN,3)=1 | |
353 | SIGH(NCHN)=FACH*RMQ*SQRT(MAX(0.,1.-4.*RMQ)) | |
354 | 180 CONTINUE | |
355 | ||
356 | ELSEIF(ISUB.EQ.4) THEN | |
357 | C...gamma + W+/- -> W+/-. | |
358 | ||
359 | ELSEIF(ISUB.EQ.5) THEN | |
360 | C...Z0 + Z0 -> H0. | |
361 | CALL PYWIDT_HIJING(25,SQRT(SH),WDTP,WDTE) | |
362 | FACH=COMFAC*1./(128.*PARU(1)**2*16.*(1.-XW)**3)*(AEM/XW)**4* | |
363 | & (SH/SQMW)**2*SH2/((SH-SQMH)**2+GMMH**2)* | |
364 | & (WDTE(0,1)+WDTE(0,2)+WDTE(0,4)) | |
365 | DO 200 I=MIN1,MAX1 | |
366 | IF(I.EQ.0.OR.KFAC(1,I).EQ.0) GOTO 200 | |
367 | DO 190 J=MIN2,MAX2 | |
368 | IF(J.EQ.0.OR.KFAC(2,J).EQ.0) GOTO 190 | |
369 | EI=KCHG(IABS(I),1)/3. | |
370 | AI=SIGN(1.,EI) | |
371 | VI=AI-4.*EI*XW | |
372 | EJ=KCHG(IABS(J),1)/3. | |
373 | AJ=SIGN(1.,EJ) | |
374 | VJ=AJ-4.*EJ*XW | |
375 | NCHN=NCHN+1 | |
376 | ISIG(NCHN,1)=I | |
377 | ISIG(NCHN,2)=J | |
378 | ISIG(NCHN,3)=1 | |
379 | SIGH(NCHN)=FACH*(VI**2+AI**2)*(VJ**2+AJ**2) | |
380 | 190 CONTINUE | |
381 | 200 CONTINUE | |
382 | ||
383 | ELSEIF(ISUB.EQ.6) THEN | |
384 | C...Z0 + W+/- -> W+/-. | |
385 | ||
386 | ELSEIF(ISUB.EQ.7) THEN | |
387 | C...W+ + W- -> Z0. | |
388 | ||
389 | ELSEIF(ISUB.EQ.8) THEN | |
390 | C...W+ + W- -> H0. | |
391 | CALL PYWIDT_HIJING(25,SQRT(SH),WDTP,WDTE) | |
392 | FACH=COMFAC*1./(128*PARU(1)**2)*(AEM/XW)**4*(SH/SQMW)**2* | |
393 | & SH2/((SH-SQMH)**2+GMMH**2)*(WDTE(0,1)+WDTE(0,2)+WDTE(0,4)) | |
394 | DO 220 I=MIN1,MAX1 | |
395 | IF(I.EQ.0.OR.KFAC(1,I).EQ.0) GOTO 220 | |
396 | EI=SIGN(1.,FLOAT(I))*KCHG(IABS(I),1) | |
397 | DO 210 J=MIN2,MAX2 | |
398 | IF(J.EQ.0.OR.KFAC(2,J).EQ.0) GOTO 210 | |
399 | EJ=SIGN(1.,FLOAT(J))*KCHG(IABS(J),1) | |
400 | IF(EI*EJ.GT.0.) GOTO 210 | |
401 | NCHN=NCHN+1 | |
402 | ISIG(NCHN,1)=I | |
403 | ISIG(NCHN,2)=J | |
404 | ISIG(NCHN,3)=1 | |
405 | SIGH(NCHN)=FACH*VINT(180+I)*VINT(180+J) | |
406 | 210 CONTINUE | |
407 | 220 CONTINUE | |
408 | ENDIF | |
409 | ||
410 | C...B: 2 -> 2, tree diagrams. | |
411 | ||
412 | ELSEIF(ISUB.LE.20) THEN | |
413 | IF(ISUB.EQ.11) THEN | |
414 | C...f + f' -> f + f'. | |
415 | FACQQ1=COMFAC*AS**2*4./9.*(SH2+UH2)/TH2 | |
416 | FACQQB=COMFAC*AS**2*4./9.*((SH2+UH2)/TH2*FACA- | |
417 | & MSTP(34)*2./3.*UH2/(SH*TH)) | |
418 | FACQQ2=COMFAC*AS**2*4./9.*((SH2+TH2)/UH2- | |
419 | & MSTP(34)*2./3.*SH2/(TH*UH)) | |
420 | DO 240 I=MIN1,MAX1 | |
421 | IF(I.EQ.0.OR.KFAC(1,I).EQ.0) GOTO 240 | |
422 | DO 230 J=MIN2,MAX2 | |
423 | IF(J.EQ.0.OR.KFAC(2,J).EQ.0) GOTO 230 | |
424 | NCHN=NCHN+1 | |
425 | ISIG(NCHN,1)=I | |
426 | ISIG(NCHN,2)=J | |
427 | ISIG(NCHN,3)=1 | |
428 | SIGH(NCHN)=FACQQ1 | |
429 | IF(I.EQ.-J) SIGH(NCHN)=FACQQB | |
430 | IF(I.EQ.J) THEN | |
431 | SIGH(NCHN)=0.5*SIGH(NCHN) | |
432 | NCHN=NCHN+1 | |
433 | ISIG(NCHN,1)=I | |
434 | ISIG(NCHN,2)=J | |
435 | ISIG(NCHN,3)=2 | |
436 | SIGH(NCHN)=0.5*FACQQ2 | |
437 | ENDIF | |
438 | 230 CONTINUE | |
439 | 240 CONTINUE | |
440 | ||
441 | ELSEIF(ISUB.EQ.12) THEN | |
442 | C...f + fb -> f' + fb' (q + qb -> q' + qb' only). | |
443 | CALL PYWIDT_HIJING(21,SQRT(SH),WDTP,WDTE) | |
444 | FACQQB=COMFAC*AS**2*4./9.*(TH2+UH2)/SH2*(WDTE(0,1)+WDTE(0,2)+ | |
445 | & WDTE(0,3)+WDTE(0,4)) | |
446 | DO 250 I=MINA,MAXA | |
447 | IF(I.EQ.0.OR.KFAC(1,I)*KFAC(2,-I).EQ.0) GOTO 250 | |
448 | NCHN=NCHN+1 | |
449 | ISIG(NCHN,1)=I | |
450 | ISIG(NCHN,2)=-I | |
451 | ISIG(NCHN,3)=1 | |
452 | SIGH(NCHN)=FACQQB | |
453 | 250 CONTINUE | |
454 | ||
455 | ELSEIF(ISUB.EQ.13) THEN | |
456 | C...f + fb -> g + g (q + qb -> g + g only). | |
457 | FACGG1=COMFAC*AS**2*32./27.*(UH/TH-(2.+MSTP(34)*1./4.)*UH2/SH2) | |
458 | FACGG2=COMFAC*AS**2*32./27.*(TH/UH-(2.+MSTP(34)*1./4.)*TH2/SH2) | |
459 | DO 260 I=MINA,MAXA | |
460 | IF(I.EQ.0.OR.KFAC(1,I)*KFAC(2,-I).EQ.0) GOTO 260 | |
461 | NCHN=NCHN+1 | |
462 | ISIG(NCHN,1)=I | |
463 | ISIG(NCHN,2)=-I | |
464 | ISIG(NCHN,3)=1 | |
465 | SIGH(NCHN)=0.5*FACGG1 | |
466 | NCHN=NCHN+1 | |
467 | ISIG(NCHN,1)=I | |
468 | ISIG(NCHN,2)=-I | |
469 | ISIG(NCHN,3)=2 | |
470 | SIGH(NCHN)=0.5*FACGG2 | |
471 | 260 CONTINUE | |
472 | ||
473 | ELSEIF(ISUB.EQ.14) THEN | |
474 | C...f + fb -> g + gamma (q + qb -> g + gamma only). | |
475 | FACGG=COMFAC*AS*AEM*8./9.*(TH2+UH2)/(TH*UH) | |
476 | DO 270 I=MINA,MAXA | |
477 | IF(I.EQ.0.OR.KFAC(1,I)*KFAC(2,-I).EQ.0) GOTO 270 | |
478 | EI=KCHG(IABS(I),1)/3. | |
479 | NCHN=NCHN+1 | |
480 | ISIG(NCHN,1)=I | |
481 | ISIG(NCHN,2)=-I | |
482 | ISIG(NCHN,3)=1 | |
483 | SIGH(NCHN)=FACGG*EI**2 | |
484 | 270 CONTINUE | |
485 | ||
486 | ELSEIF(ISUB.EQ.15) THEN | |
487 | C...f + fb -> g + Z0 (q + qb -> g + Z0 only). | |
488 | FACZG=COMFAC*AS*AEM/(XW*(1.-XW))*1./18.* | |
489 | & (TH2+UH2+2.*SQM4*SH)/(TH*UH) | |
490 | FACZG=FACZG*WIDS(23,2) | |
491 | DO 280 I=MINA,MAXA | |
492 | IF(I.EQ.0.OR.KFAC(1,I)*KFAC(2,-I).EQ.0) GOTO 280 | |
493 | EI=KCHG(IABS(I),1)/3. | |
494 | AI=SIGN(1.,EI) | |
495 | VI=AI-4.*EI*XW | |
496 | NCHN=NCHN+1 | |
497 | ISIG(NCHN,1)=I | |
498 | ISIG(NCHN,2)=-I | |
499 | ISIG(NCHN,3)=1 | |
500 | SIGH(NCHN)=FACZG*(VI**2+AI**2) | |
501 | 280 CONTINUE | |
502 | ||
503 | ELSEIF(ISUB.EQ.16) THEN | |
504 | C...f + fb' -> g + W+/- (q + qb' -> g + W+/- only). | |
505 | FACWG=COMFAC*AS*AEM/XW*2./9.*(TH2+UH2+2.*SQM4*SH)/(TH*UH) | |
506 | DO 300 I=MIN1,MAX1 | |
507 | IF(I.EQ.0.OR.KFAC(1,I).EQ.0) GOTO 300 | |
508 | IA=IABS(I) | |
509 | DO 290 J=MIN2,MAX2 | |
510 | IF(J.EQ.0.OR.KFAC(2,J).EQ.0) GOTO 290 | |
511 | JA=IABS(J) | |
512 | IF(I*J.GT.0.OR.MOD(IA+JA,2).EQ.0) GOTO 290 | |
513 | KCHW=(KCHG(IA,1)*ISIGN(1,I)+KCHG(JA,1)*ISIGN(1,J))/3 | |
514 | FCKM=1. | |
515 | IF(MINT(43).EQ.4) FCKM=VCKM((IA+1)/2,(JA+1)/2) | |
516 | NCHN=NCHN+1 | |
517 | ISIG(NCHN,1)=I | |
518 | ISIG(NCHN,2)=J | |
519 | ISIG(NCHN,3)=1 | |
520 | SIGH(NCHN)=FACWG*FCKM*WIDS(24,(5-KCHW)/2) | |
521 | 290 CONTINUE | |
522 | 300 CONTINUE | |
523 | ||
524 | ELSEIF(ISUB.EQ.17) THEN | |
525 | C...f + fb -> g + H0 (q + qb -> g + H0 only). | |
526 | ||
527 | ELSEIF(ISUB.EQ.18) THEN | |
528 | C...f + fb -> gamma + gamma. | |
529 | FACGG=COMFAC*FACA*AEM**2*1./3.*(TH2+UH2)/(TH*UH) | |
530 | DO 310 I=MINA,MAXA | |
531 | IF(I.EQ.0.OR.KFAC(1,I)*KFAC(2,-I).EQ.0) GOTO 310 | |
532 | EI=KCHG(IABS(I),1)/3. | |
533 | NCHN=NCHN+1 | |
534 | ISIG(NCHN,1)=I | |
535 | ISIG(NCHN,2)=-I | |
536 | ISIG(NCHN,3)=1 | |
537 | SIGH(NCHN)=FACGG*EI**4 | |
538 | 310 CONTINUE | |
539 | ||
540 | ELSEIF(ISUB.EQ.19) THEN | |
541 | C...f + fb -> gamma + Z0. | |
542 | FACGZ=COMFAC*FACA*AEM**2/(XW*(1.-XW))*1./24.* | |
543 | & (TH2+UH2+2.*SQM4*SH)/(TH*UH) | |
544 | FACGZ=FACGZ*WIDS(23,2) | |
545 | DO 320 I=MINA,MAXA | |
546 | IF(I.EQ.0.OR.KFAC(1,I)*KFAC(2,-I).EQ.0) GOTO 320 | |
547 | EI=KCHG(IABS(I),1)/3. | |
548 | AI=SIGN(1.,EI) | |
549 | VI=AI-4.*EI*XW | |
550 | NCHN=NCHN+1 | |
551 | ISIG(NCHN,1)=I | |
552 | ISIG(NCHN,2)=-I | |
553 | ISIG(NCHN,3)=1 | |
554 | SIGH(NCHN)=FACGZ*EI**2*(VI**2+AI**2) | |
555 | 320 CONTINUE | |
556 | ||
557 | ELSEIF(ISUB.EQ.20) THEN | |
558 | C...f + fb' -> gamma + W+/-. | |
559 | FACGW=COMFAC*FACA*AEM**2/XW*1./6.* | |
560 | & ((2.*UH-TH)/(3.*(SH-SQM4)))**2*(TH2+UH2+2.*SQM4*SH)/(TH*UH) | |
561 | DO 340 I=MIN1,MAX1 | |
562 | IF(I.EQ.0.OR.KFAC(1,I).EQ.0) GOTO 340 | |
563 | IA=IABS(I) | |
564 | DO 330 J=MIN2,MAX2 | |
565 | IF(J.EQ.0.OR.KFAC(2,J).EQ.0) GOTO 330 | |
566 | JA=IABS(J) | |
567 | IF(I*J.GT.0.OR.MOD(IA+JA,2).EQ.0) GOTO 330 | |
568 | KCHW=(KCHG(IA,1)*ISIGN(1,I)+KCHG(JA,1)*ISIGN(1,J))/3 | |
569 | FCKM=1. | |
570 | IF(MINT(43).EQ.4) FCKM=VCKM((IA+1)/2,(JA+1)/2) | |
571 | NCHN=NCHN+1 | |
572 | ISIG(NCHN,1)=I | |
573 | ISIG(NCHN,2)=J | |
574 | ISIG(NCHN,3)=1 | |
575 | SIGH(NCHN)=FACGW*FCKM*WIDS(24,(5-KCHW)/2) | |
576 | 330 CONTINUE | |
577 | 340 CONTINUE | |
578 | ENDIF | |
579 | ||
580 | ELSEIF(ISUB.LE.30) THEN | |
581 | IF(ISUB.EQ.21) THEN | |
582 | C...f + fb -> gamma + H0. | |
583 | ||
584 | ELSEIF(ISUB.EQ.22) THEN | |
585 | C...f + fb -> Z0 + Z0. | |
586 | FACZZ=COMFAC*FACA*(AEM/(XW*(1.-XW)))**2*1./768.* | |
587 | & (UH/TH+TH/UH+2.*(SQM3+SQM4)*SH/(TH*UH)- | |
588 | & SQM3*SQM4*(1./TH2+1./UH2)) | |
589 | FACZZ=FACZZ*WIDS(23,1) | |
590 | DO 350 I=MINA,MAXA | |
591 | IF(I.EQ.0.OR.KFAC(1,I)*KFAC(2,-I).EQ.0) GOTO 350 | |
592 | EI=KCHG(IABS(I),1)/3. | |
593 | AI=SIGN(1.,EI) | |
594 | VI=AI-4.*EI*XW | |
595 | NCHN=NCHN+1 | |
596 | ISIG(NCHN,1)=I | |
597 | ISIG(NCHN,2)=-I | |
598 | ISIG(NCHN,3)=1 | |
599 | SIGH(NCHN)=FACZZ*(VI**4+6.*VI**2*AI**2+AI**4) | |
600 | 350 CONTINUE | |
601 | ||
602 | ELSEIF(ISUB.EQ.23) THEN | |
603 | C...f + fb' -> Z0 + W+/-. | |
604 | FACZW=COMFAC*FACA*(AEM/XW)**2*1./6. | |
605 | FACZW=FACZW*WIDS(23,2) | |
606 | THUH=MAX(TH*UH-SQM3*SQM4,SH*CKIN(3)**2) | |
607 | DO 370 I=MIN1,MAX1 | |
608 | IF(I.EQ.0.OR.KFAC(1,I).EQ.0) GOTO 370 | |
609 | IA=IABS(I) | |
610 | DO 360 J=MIN2,MAX2 | |
611 | IF(J.EQ.0.OR.KFAC(2,J).EQ.0) GOTO 360 | |
612 | JA=IABS(J) | |
613 | IF(I*J.GT.0.OR.MOD(IA+JA,2).EQ.0) GOTO 360 | |
614 | KCHW=(KCHG(IA,1)*ISIGN(1,I)+KCHG(JA,1)*ISIGN(1,J))/3 | |
615 | EI=KCHG(IA,1)/3. | |
616 | AI=SIGN(1.,EI) | |
617 | VI=AI-4.*EI*XW | |
618 | EJ=KCHG(JA,1)/3. | |
619 | AJ=SIGN(1.,EJ) | |
620 | VJ=AJ-4.*EJ*XW | |
621 | IF(VI+AI.GT.0) THEN | |
622 | VISAV=VI | |
623 | AISAV=AI | |
624 | VI=VJ | |
625 | AI=AJ | |
626 | VJ=VISAV | |
627 | AJ=AISAV | |
628 | ENDIF | |
629 | FCKM=1. | |
630 | IF(MINT(43).EQ.4) FCKM=VCKM((IA+1)/2,(JA+1)/2) | |
631 | NCHN=NCHN+1 | |
632 | ISIG(NCHN,1)=I | |
633 | ISIG(NCHN,2)=J | |
634 | ISIG(NCHN,3)=1 | |
635 | SIGH(NCHN)=FACZW*FCKM*(1./(SH-SQMW)**2* | |
636 | & ((9.-8.*XW)/4.*THUH+(8.*XW-6.)/4.*SH*(SQM3+SQM4))+ | |
637 | & (THUH-SH*(SQM3+SQM4))/(2.*(SH-SQMW))*((VJ+AJ)/TH-(VI+AI)/UH)+ | |
638 | & THUH/(16.*(1.-XW))*((VJ+AJ)**2/TH2+(VI+AI)**2/UH2)+ | |
639 | & SH*(SQM3+SQM4)/(8.*(1.-XW))*(VI+AI)*(VJ+AJ)/(TH*UH))* | |
640 | & WIDS(24,(5-KCHW)/2) | |
641 | 360 CONTINUE | |
642 | 370 CONTINUE | |
643 | ||
644 | ELSEIF(ISUB.EQ.24) THEN | |
645 | C...f + fb -> Z0 + H0. | |
646 | THUH=MAX(TH*UH-SQM3*SQM4,SH*CKIN(3)**2) | |
647 | FACHZ=COMFAC*FACA*(AEM/(XW*(1.-XW)))**2*1./96.* | |
648 | & (THUH+2.*SH*SQMZ)/(SH-SQMZ)**2 | |
649 | FACHZ=FACHZ*WIDS(23,2)*WIDS(25,2) | |
650 | DO 380 I=MINA,MAXA | |
651 | IF(I.EQ.0.OR.KFAC(1,I)*KFAC(2,-I).EQ.0) GOTO 380 | |
652 | EI=KCHG(IABS(I),1)/3. | |
653 | AI=SIGN(1.,EI) | |
654 | VI=AI-4.*EI*XW | |
655 | NCHN=NCHN+1 | |
656 | ISIG(NCHN,1)=I | |
657 | ISIG(NCHN,2)=-I | |
658 | ISIG(NCHN,3)=1 | |
659 | SIGH(NCHN)=FACHZ*(VI**2+AI**2) | |
660 | 380 CONTINUE | |
661 | ||
662 | ELSEIF(ISUB.EQ.25) THEN | |
663 | C...f + fb -> W+ + W-. | |
664 | FACWW=COMFAC*FACA*(AEM/XW)**2*1./12. | |
665 | FACWW=FACWW*WIDS(24,1) | |
666 | THUH=MAX(TH*UH-SQM3*SQM4,SH*CKIN(3)**2) | |
667 | DO 390 I=MINA,MAXA | |
668 | IF(I.EQ.0.OR.KFAC(1,I)*KFAC(2,-I).EQ.0) GOTO 390 | |
669 | EI=KCHG(IABS(I),1)/3. | |
670 | AI=SIGN(1.,EI) | |
671 | VI=AI-4.*EI*XW | |
672 | DSIGWW=THUH/SH2*(3.-(SH-3.*(SQM3+SQM4))/(SH-SQMZ)* | |
673 | & (VI+AI)/(2.*AI*(1.-XW))+(SH/(SH-SQMZ))**2* | |
674 | & (1.-2.*(SQM3+SQM4)/SH+12.*SQM3*SQM4/SH2)*(VI**2+AI**2)/ | |
675 | & (8.*(1.-XW)**2))-2.*SQMZ/(SH-SQMZ)*(VI+AI)/AI+ | |
676 | & SQMZ*SH/(SH-SQMZ)**2*(1.-2.*(SQM3+SQM4)/SH)*(VI**2+AI**2)/ | |
677 | & (2.*(1.-XW)) | |
678 | IF(KCHG(IABS(I),1).LT.0) THEN | |
679 | DSIGWW=DSIGWW+2.*(1.+SQMZ/(SH-SQMZ)*(VI+AI)/(2.*AI))* | |
680 | & (THUH/(SH*TH)-(SQM3+SQM4)/TH)+THUH/TH2 | |
681 | ELSE | |
682 | DSIGWW=DSIGWW+2.*(1.+SQMZ/(SH-SQMZ)*(VI+AI)/(2.*AI))* | |
683 | & (THUH/(SH*UH)-(SQM3+SQM4)/UH)+THUH/UH2 | |
684 | ENDIF | |
685 | NCHN=NCHN+1 | |
686 | ISIG(NCHN,1)=I | |
687 | ISIG(NCHN,2)=-I | |
688 | ISIG(NCHN,3)=1 | |
689 | SIGH(NCHN)=FACWW*DSIGWW | |
690 | 390 CONTINUE | |
691 | ||
692 | ELSEIF(ISUB.EQ.26) THEN | |
693 | C...f + fb' -> W+/- + H0. | |
694 | THUH=MAX(TH*UH-SQM3*SQM4,SH*CKIN(3)**2) | |
695 | FACHW=COMFAC*FACA*(AEM/XW)**2*1./24.*(THUH+2.*SH*SQMW)/ | |
696 | & (SH-SQMW)**2 | |
697 | FACHW=FACHW*WIDS(25,2) | |
698 | DO 410 I=MIN1,MAX1 | |
699 | IF(I.EQ.0.OR.KFAC(1,I).EQ.0) GOTO 410 | |
700 | IA=IABS(I) | |
701 | DO 400 J=MIN2,MAX2 | |
702 | IF(J.EQ.0.OR.KFAC(1,J).EQ.0) GOTO 400 | |
703 | JA=IABS(J) | |
704 | IF(I*J.GT.0.OR.MOD(IA+JA,2).EQ.0) GOTO 400 | |
705 | KCHW=(KCHG(IA,1)*ISIGN(1,I)+KCHG(JA,1)*ISIGN(1,J))/3 | |
706 | FCKM=1. | |
707 | IF(MINT(43).EQ.4) FCKM=VCKM((IA+1)/2,(JA+1)/2) | |
708 | NCHN=NCHN+1 | |
709 | ISIG(NCHN,1)=I | |
710 | ISIG(NCHN,2)=J | |
711 | ISIG(NCHN,3)=1 | |
712 | SIGH(NCHN)=FACHW*FCKM*WIDS(24,(5-KCHW)/2) | |
713 | 400 CONTINUE | |
714 | 410 CONTINUE | |
715 | ||
716 | ELSEIF(ISUB.EQ.27) THEN | |
717 | C...f + fb -> H0 + H0. | |
718 | ||
719 | ELSEIF(ISUB.EQ.28) THEN | |
720 | C...f + g -> f + g (q + g -> q + g only). | |
721 | FACQG1=COMFAC*AS**2*4./9.*((2.+MSTP(34)*1./4.)*UH2/TH2-UH/SH)* | |
722 | & FACA | |
723 | FACQG2=COMFAC*AS**2*4./9.*((2.+MSTP(34)*1./4.)*SH2/TH2-SH/UH) | |
724 | DO 430 I=MINA,MAXA | |
725 | IF(I.EQ.0) GOTO 430 | |
726 | DO 420 ISDE=1,2 | |
727 | IF(ISDE.EQ.1.AND.KFAC(1,I)*KFAC(2,21).EQ.0) GOTO 420 | |
728 | IF(ISDE.EQ.2.AND.KFAC(1,21)*KFAC(2,I).EQ.0) GOTO 420 | |
729 | NCHN=NCHN+1 | |
730 | ISIG(NCHN,ISDE)=I | |
731 | ISIG(NCHN,3-ISDE)=21 | |
732 | ISIG(NCHN,3)=1 | |
733 | SIGH(NCHN)=FACQG1 | |
734 | NCHN=NCHN+1 | |
735 | ISIG(NCHN,ISDE)=I | |
736 | ISIG(NCHN,3-ISDE)=21 | |
737 | ISIG(NCHN,3)=2 | |
738 | SIGH(NCHN)=FACQG2 | |
739 | 420 CONTINUE | |
740 | 430 CONTINUE | |
741 | ||
742 | ELSEIF(ISUB.EQ.29) THEN | |
743 | C...f + g -> f + gamma (q + g -> q + gamma only). | |
744 | FGQ=COMFAC*FACA*AS*AEM*1./3.*(SH2+UH2)/(-SH*UH) | |
745 | DO 450 I=MINA,MAXA | |
746 | IF(I.EQ.0) GOTO 450 | |
747 | EI=KCHG(IABS(I),1)/3. | |
748 | FACGQ=FGQ*EI**2 | |
749 | DO 440 ISDE=1,2 | |
750 | IF(ISDE.EQ.1.AND.KFAC(1,I)*KFAC(2,21).EQ.0) GOTO 440 | |
751 | IF(ISDE.EQ.2.AND.KFAC(1,21)*KFAC(2,I).EQ.0) GOTO 440 | |
752 | NCHN=NCHN+1 | |
753 | ISIG(NCHN,ISDE)=I | |
754 | ISIG(NCHN,3-ISDE)=21 | |
755 | ISIG(NCHN,3)=1 | |
756 | SIGH(NCHN)=FACGQ | |
757 | 440 CONTINUE | |
758 | 450 CONTINUE | |
759 | ||
760 | ELSEIF(ISUB.EQ.30) THEN | |
761 | C...f + g -> f + Z0 (q + g -> q + Z0 only). | |
762 | FZQ=COMFAC*FACA*AS*AEM/(XW*(1.-XW))*1./48.* | |
763 | & (SH2+UH2+2.*SQM4*TH)/(-SH*UH) | |
764 | FZQ=FZQ*WIDS(23,2) | |
765 | DO 470 I=MINA,MAXA | |
766 | IF(I.EQ.0) GOTO 470 | |
767 | EI=KCHG(IABS(I),1)/3. | |
768 | AI=SIGN(1.,EI) | |
769 | VI=AI-4.*EI*XW | |
770 | FACZQ=FZQ*(VI**2+AI**2) | |
771 | DO 460 ISDE=1,2 | |
772 | IF(ISDE.EQ.1.AND.KFAC(1,I)*KFAC(2,21).EQ.0) GOTO 460 | |
773 | IF(ISDE.EQ.2.AND.KFAC(1,21)*KFAC(2,I).EQ.0) GOTO 460 | |
774 | NCHN=NCHN+1 | |
775 | ISIG(NCHN,ISDE)=I | |
776 | ISIG(NCHN,3-ISDE)=21 | |
777 | ISIG(NCHN,3)=1 | |
778 | SIGH(NCHN)=FACZQ | |
779 | 460 CONTINUE | |
780 | 470 CONTINUE | |
781 | ENDIF | |
782 | ||
783 | ELSEIF(ISUB.LE.40) THEN | |
784 | IF(ISUB.EQ.31) THEN | |
785 | C...f + g -> f' + W+/- (q + g -> q' + W+/- only). | |
786 | FACWQ=COMFAC*FACA*AS*AEM/XW*1./12.* | |
787 | & (SH2+UH2+2.*SQM4*TH)/(-SH*UH) | |
788 | DO 490 I=MINA,MAXA | |
789 | IF(I.EQ.0) GOTO 490 | |
790 | IA=IABS(I) | |
791 | KCHW=ISIGN(1,KCHG(IA,1)*ISIGN(1,I)) | |
792 | DO 480 ISDE=1,2 | |
793 | IF(ISDE.EQ.1.AND.KFAC(1,I)*KFAC(2,21).EQ.0) GOTO 480 | |
794 | IF(ISDE.EQ.2.AND.KFAC(1,21)*KFAC(2,I).EQ.0) GOTO 480 | |
795 | NCHN=NCHN+1 | |
796 | ISIG(NCHN,ISDE)=I | |
797 | ISIG(NCHN,3-ISDE)=21 | |
798 | ISIG(NCHN,3)=1 | |
799 | SIGH(NCHN)=FACWQ*VINT(180+I)*WIDS(24,(5-KCHW)/2) | |
800 | 480 CONTINUE | |
801 | 490 CONTINUE | |
802 | ||
803 | ELSEIF(ISUB.EQ.32) THEN | |
804 | C...f + g -> f + H0 (q + g -> q + H0 only). | |
805 | ||
806 | ELSEIF(ISUB.EQ.33) THEN | |
807 | C...f + gamma -> f + g (q + gamma -> q + g only). | |
808 | ||
809 | ELSEIF(ISUB.EQ.34) THEN | |
810 | C...f + gamma -> f + gamma. | |
811 | ||
812 | ELSEIF(ISUB.EQ.35) THEN | |
813 | C...f + gamma -> f + Z0. | |
814 | ||
815 | ELSEIF(ISUB.EQ.36) THEN | |
816 | C...f + gamma -> f' + W+/-. | |
817 | ||
818 | ELSEIF(ISUB.EQ.37) THEN | |
819 | C...f + gamma -> f + H0. | |
820 | ||
821 | ELSEIF(ISUB.EQ.38) THEN | |
822 | C...f + Z0 -> f + g (q + Z0 -> q + g only). | |
823 | ||
824 | ELSEIF(ISUB.EQ.39) THEN | |
825 | C...f + Z0 -> f + gamma. | |
826 | ||
827 | ELSEIF(ISUB.EQ.40) THEN | |
828 | C...f + Z0 -> f + Z0. | |
829 | ENDIF | |
830 | ||
831 | ELSEIF(ISUB.LE.50) THEN | |
832 | IF(ISUB.EQ.41) THEN | |
833 | C...f + Z0 -> f' + W+/-. | |
834 | ||
835 | ELSEIF(ISUB.EQ.42) THEN | |
836 | C...f + Z0 -> f + H0. | |
837 | ||
838 | ELSEIF(ISUB.EQ.43) THEN | |
839 | C...f + W+/- -> f' + g (q + W+/- -> q' + g only). | |
840 | ||
841 | ELSEIF(ISUB.EQ.44) THEN | |
842 | C...f + W+/- -> f' + gamma. | |
843 | ||
844 | ELSEIF(ISUB.EQ.45) THEN | |
845 | C...f + W+/- -> f' + Z0. | |
846 | ||
847 | ELSEIF(ISUB.EQ.46) THEN | |
848 | C...f + W+/- -> f' + W+/-. | |
849 | ||
850 | ELSEIF(ISUB.EQ.47) THEN | |
851 | C...f + W+/- -> f' + H0. | |
852 | ||
853 | ELSEIF(ISUB.EQ.48) THEN | |
854 | C...f + H0 -> f + g (q + H0 -> q + g only). | |
855 | ||
856 | ELSEIF(ISUB.EQ.49) THEN | |
857 | C...f + H0 -> f + gamma. | |
858 | ||
859 | ELSEIF(ISUB.EQ.50) THEN | |
860 | C...f + H0 -> f + Z0. | |
861 | ENDIF | |
862 | ||
863 | ELSEIF(ISUB.LE.60) THEN | |
864 | IF(ISUB.EQ.51) THEN | |
865 | C...f + H0 -> f' + W+/-. | |
866 | ||
867 | ELSEIF(ISUB.EQ.52) THEN | |
868 | C...f + H0 -> f + H0. | |
869 | ||
870 | ELSEIF(ISUB.EQ.53) THEN | |
871 | C...g + g -> f + fb (g + g -> q + qb only). | |
872 | CALL PYWIDT_HIJING(21,SQRT(SH),WDTP,WDTE) | |
873 | FACQQ1=COMFAC*AS**2*1./6.*(UH/TH-(2.+MSTP(34)*1./4.)*UH2/SH2)* | |
874 | & (WDTE(0,1)+WDTE(0,2)+WDTE(0,3)+WDTE(0,4))*FACA | |
875 | FACQQ2=COMFAC*AS**2*1./6.*(TH/UH-(2.+MSTP(34)*1./4.)*TH2/SH2)* | |
876 | & (WDTE(0,1)+WDTE(0,2)+WDTE(0,3)+WDTE(0,4))*FACA | |
877 | IF(KFAC(1,21)*KFAC(2,21).EQ.0) GOTO 500 | |
878 | NCHN=NCHN+1 | |
879 | ISIG(NCHN,1)=21 | |
880 | ISIG(NCHN,2)=21 | |
881 | ISIG(NCHN,3)=1 | |
882 | SIGH(NCHN)=FACQQ1 | |
883 | NCHN=NCHN+1 | |
884 | ISIG(NCHN,1)=21 | |
885 | ISIG(NCHN,2)=21 | |
886 | ISIG(NCHN,3)=2 | |
887 | SIGH(NCHN)=FACQQ2 | |
888 | 500 CONTINUE | |
889 | ||
890 | ELSEIF(ISUB.EQ.54) THEN | |
891 | C...g + gamma -> f + fb (g + gamma -> q + qb only). | |
892 | ||
893 | ELSEIF(ISUB.EQ.55) THEN | |
894 | C...g + gamma -> f + fb (g + gamma -> q + qb only). | |
895 | ||
896 | ELSEIF(ISUB.EQ.56) THEN | |
897 | C...g + gamma -> f + fb (g + gamma -> q + qb only). | |
898 | ||
899 | ELSEIF(ISUB.EQ.57) THEN | |
900 | C...g + gamma -> f + fb (g + gamma -> q + qb only). | |
901 | ||
902 | ELSEIF(ISUB.EQ.58) THEN | |
903 | C...gamma + gamma -> f + fb. | |
904 | ||
905 | ELSEIF(ISUB.EQ.59) THEN | |
906 | C...gamma + Z0 -> f + fb. | |
907 | ||
908 | ELSEIF(ISUB.EQ.60) THEN | |
909 | C...gamma + W+/- -> f + fb'. | |
910 | ENDIF | |
911 | ||
912 | ELSEIF(ISUB.LE.70) THEN | |
913 | IF(ISUB.EQ.61) THEN | |
914 | C...gamma + H0 -> f + fb. | |
915 | ||
916 | ELSEIF(ISUB.EQ.62) THEN | |
917 | C...Z0 + Z0 -> f + fb. | |
918 | ||
919 | ELSEIF(ISUB.EQ.63) THEN | |
920 | C...Z0 + W+/- -> f + fb'. | |
921 | ||
922 | ELSEIF(ISUB.EQ.64) THEN | |
923 | C...Z0 + H0 -> f + fb. | |
924 | ||
925 | ELSEIF(ISUB.EQ.65) THEN | |
926 | C...W+ + W- -> f + fb. | |
927 | ||
928 | ELSEIF(ISUB.EQ.66) THEN | |
929 | C...W+/- + H0 -> f + fb'. | |
930 | ||
931 | ELSEIF(ISUB.EQ.67) THEN | |
932 | C...H0 + H0 -> f + fb. | |
933 | ||
934 | ELSEIF(ISUB.EQ.68) THEN | |
935 | C...g + g -> g + g. | |
936 | FACGG1=COMFAC*AS**2*9./4.*(SH2/TH2+2.*SH/TH+3.+2.*TH/SH+ | |
937 | & TH2/SH2)*FACA | |
938 | FACGG2=COMFAC*AS**2*9./4.*(UH2/SH2+2.*UH/SH+3.+2.*SH/UH+ | |
939 | & SH2/UH2)*FACA | |
940 | FACGG3=COMFAC*AS**2*9./4.*(TH2/UH2+2.*TH/UH+3+2.*UH/TH+UH2/TH2) | |
941 | IF(KFAC(1,21)*KFAC(2,21).EQ.0) GOTO 510 | |
942 | NCHN=NCHN+1 | |
943 | ISIG(NCHN,1)=21 | |
944 | ISIG(NCHN,2)=21 | |
945 | ISIG(NCHN,3)=1 | |
946 | SIGH(NCHN)=0.5*FACGG1 | |
947 | NCHN=NCHN+1 | |
948 | ISIG(NCHN,1)=21 | |
949 | ISIG(NCHN,2)=21 | |
950 | ISIG(NCHN,3)=2 | |
951 | SIGH(NCHN)=0.5*FACGG2 | |
952 | NCHN=NCHN+1 | |
953 | ISIG(NCHN,1)=21 | |
954 | ISIG(NCHN,2)=21 | |
955 | ISIG(NCHN,3)=3 | |
956 | SIGH(NCHN)=0.5*FACGG3 | |
957 | 510 CONTINUE | |
958 | ||
959 | ELSEIF(ISUB.EQ.69) THEN | |
960 | C...gamma + gamma -> W+ + W-. | |
961 | ||
962 | ELSEIF(ISUB.EQ.70) THEN | |
963 | C...gamma + W+/- -> gamma + W+/-. | |
964 | ENDIF | |
965 | ||
966 | ELSEIF(ISUB.LE.80) THEN | |
967 | IF(ISUB.EQ.71) THEN | |
968 | C...Z0 + Z0 -> Z0 + Z0. | |
969 | BE2=1.-4.*SQMZ/SH | |
970 | TH=-0.5*SH*BE2*(1.-CTH) | |
971 | UH=-0.5*SH*BE2*(1.+CTH) | |
972 | SHANG=1./(1.-XW)*SQMW/SQMZ*(1.+BE2)**2 | |
973 | ASHRE=(SH-SQMH)/((SH-SQMH)**2+GMMH**2)*SHANG | |
974 | ASHIM=-GMMH/((SH-SQMH)**2+GMMH**2)*SHANG | |
975 | THANG=1./(1.-XW)*SQMW/SQMZ*(BE2-CTH)**2 | |
976 | ATHRE=(TH-SQMH)/((TH-SQMH)**2+GMMH**2)*THANG | |
977 | ATHIM=-GMMH/((TH-SQMH)**2+GMMH**2)*THANG | |
978 | UHANG=1./(1.-XW)*SQMW/SQMZ*(BE2+CTH)**2 | |
979 | AUHRE=(UH-SQMH)/((UH-SQMH)**2+GMMH**2)*UHANG | |
980 | AUHIM=-GMMH/((UH-SQMH)**2+GMMH**2)*UHANG | |
981 | FACH=0.5*COMFAC*1./(4096.*PARU(1)**2*16.*(1.-XW)**2)* | |
982 | & (AEM/XW)**4*(SH/SQMW)**2*((ASHRE+ATHRE+AUHRE)**2+ | |
983 | & (ASHIM+ATHIM+AUHIM)**2)*SQMZ/SQMW | |
984 | DO 530 I=MIN1,MAX1 | |
985 | IF(I.EQ.0.OR.KFAC(1,I).EQ.0) GOTO 530 | |
986 | EI=KCHG(IABS(I),1)/3. | |
987 | AI=SIGN(1.,EI) | |
988 | VI=AI-4.*EI*XW | |
989 | AVI=AI**2+VI**2 | |
990 | DO 520 J=MIN2,MAX2 | |
991 | IF(J.EQ.0.OR.KFAC(2,J).EQ.0) GOTO 520 | |
992 | EJ=KCHG(IABS(J),1)/3. | |
993 | AJ=SIGN(1.,EJ) | |
994 | VJ=AJ-4.*EJ*XW | |
995 | AVJ=AJ**2+VJ**2 | |
996 | NCHN=NCHN+1 | |
997 | ISIG(NCHN,1)=I | |
998 | ISIG(NCHN,2)=J | |
999 | ISIG(NCHN,3)=1 | |
1000 | SIGH(NCHN)=FACH*AVI*AVJ | |
1001 | 520 CONTINUE | |
1002 | 530 CONTINUE | |
1003 | ||
1004 | ELSEIF(ISUB.EQ.72) THEN | |
1005 | C...Z0 + Z0 -> W+ + W-. | |
1006 | BE2=SQRT((1.-4.*SQMW/SH)*(1.-4.*SQMZ/SH)) | |
1007 | CTH2=CTH**2 | |
1008 | TH=-0.5*SH*(1.-2.*(SQMW+SQMZ)/SH-BE2*CTH) | |
1009 | UH=-0.5*SH*(1.-2.*(SQMW+SQMZ)/SH+BE2*CTH) | |
1010 | SHANG=4.*SQRT(SQMW/(SQMZ*(1.-XW)))*(1.-2.*SQMW/SH)* | |
1011 | & (1.-2.*SQMZ/SH) | |
1012 | ASHRE=(SH-SQMH)/((SH-SQMH)**2+GMMH**2)*SHANG | |
1013 | ASHIM=-GMMH/((SH-SQMH)**2+GMMH**2)*SHANG | |
1014 | ATWRE=(1.-XW)/SQMZ*SH/(TH-SQMW)*((CTH-BE2)**2*(3./2.+BE2/2.*CTH- | |
1015 | & (SQMW+SQMZ)/SH+(SQMW-SQMZ)**2/(SH*SQMW))+4.*((SQMW+SQMZ)/SH* | |
1016 | & (1.-3.*CTH2)+8.*SQMW*SQMZ/SH2*(2.*CTH2-1.)+ | |
1017 | & 4.*(SQMW**2+SQMZ**2)/SH2*CTH2+2.*(SQMW+SQMZ)/SH*BE2*CTH)) | |
1018 | ATWIM=0. | |
1019 | AUWRE=(1.-XW)/SQMZ*SH/(UH-SQMW)*((CTH+BE2)**2*(3./2.-BE2/2.*CTH- | |
1020 | & (SQMW+SQMZ)/SH+(SQMW-SQMZ)**2/(SH*SQMW))+4.*((SQMW+SQMZ)/SH* | |
1021 | & (1.-3.*CTH2)+8.*SQMW*SQMZ/SH2*(2.*CTH2-1.)+ | |
1022 | & 4.*(SQMW**2+SQMZ**2)/SH2*CTH2-2.*(SQMW+SQMZ)/SH*BE2*CTH)) | |
1023 | AUWIM=0. | |
1024 | A4RE=2.*(1.-XW)/SQMZ*(3.-CTH2-4.*(SQMW+SQMZ)/SH) | |
1025 | A4IM=0. | |
1026 | FACH=COMFAC*1./(4096.*PARU(1)**2*16.*(1.-XW)**2)*(AEM/XW)**4* | |
1027 | & (SH/SQMW)**2*((ASHRE+ATWRE+AUWRE+A4RE)**2+ | |
1028 | & (ASHIM+ATWIM+AUWIM+A4IM)**2)*SQMZ/SQMW | |
1029 | DO 550 I=MIN1,MAX1 | |
1030 | IF(I.EQ.0.OR.KFAC(1,I).EQ.0) GOTO 550 | |
1031 | EI=KCHG(IABS(I),1)/3. | |
1032 | AI=SIGN(1.,EI) | |
1033 | VI=AI-4.*EI*XW | |
1034 | AVI=AI**2+VI**2 | |
1035 | DO 540 J=MIN2,MAX2 | |
1036 | IF(J.EQ.0.OR.KFAC(2,J).EQ.0) GOTO 540 | |
1037 | EJ=KCHG(IABS(J),1)/3. | |
1038 | AJ=SIGN(1.,EJ) | |
1039 | VJ=AJ-4.*EJ*XW | |
1040 | AVJ=AJ**2+VJ**2 | |
1041 | NCHN=NCHN+1 | |
1042 | ISIG(NCHN,1)=I | |
1043 | ISIG(NCHN,2)=J | |
1044 | ISIG(NCHN,3)=1 | |
1045 | SIGH(NCHN)=FACH*AVI*AVJ | |
1046 | 540 CONTINUE | |
1047 | 550 CONTINUE | |
1048 | ||
1049 | ELSEIF(ISUB.EQ.73) THEN | |
1050 | C...Z0 + W+/- -> Z0 + W+/-. | |
1051 | BE2=1.-2.*(SQMZ+SQMW)/SH+((SQMZ-SQMW)/SH)**2 | |
1052 | EP1=1.+(SQMZ-SQMW)/SH | |
1053 | EP2=1.-(SQMZ-SQMW)/SH | |
1054 | TH=-0.5*SH*BE2*(1.-CTH) | |
1055 | UH=(SQMZ-SQMW)**2/SH-0.5*SH*BE2*(1.+CTH) | |
1056 | THANG=SQRT(SQMW/(SQMZ*(1.-XW)))*(BE2-EP1*CTH)*(BE2-EP2*CTH) | |
1057 | ATHRE=(TH-SQMH)/((TH-SQMH)**2+GMMH**2)*THANG | |
1058 | ATHIM=-GMMH/((TH-SQMH)**2+GMMH**2)*THANG | |
1059 | ASWRE=(1.-XW)/SQMZ*SH/(SH-SQMW)*(-BE2*(EP1+EP2)**4*CTH+ | |
1060 | & 1./4.*(BE2+EP1*EP2)**2*((EP1-EP2)**2-4.*BE2*CTH)+ | |
1061 | & 2.*BE2*(BE2+EP1*EP2)*(EP1+EP2)**2*CTH- | |
1062 | & 1./16.*SH/SQMW*(EP1**2-EP2**2)**2*(BE2+EP1*EP2)**2) | |
1063 | ASWIM=0. | |
1064 | AUWRE=(1.-XW)/SQMZ*SH/(UH-SQMW)*(-BE2*(EP2+EP1*CTH)* | |
1065 | & (EP1+EP2*CTH)*(BE2+EP1*EP2)+BE2*(EP2+EP1*CTH)* | |
1066 | & (BE2+EP1*EP2*CTH)*(2.*EP2-EP2*CTH+EP1)-BE2*(EP2+EP1*CTH)**2* | |
1067 | & (BE2-EP2**2*CTH)-1./8.*(BE2+EP1*EP2*CTH)**2*((EP1+EP2)**2+ | |
1068 | & 2.*BE2*(1.-CTH))+1./32.*SH/SQMW*(BE2+EP1*EP2*CTH)**2* | |
1069 | & (EP1**2-EP2**2)**2-BE2*(EP1+EP2*CTH)*(EP2+EP1*CTH)* | |
1070 | & (BE2+EP1*EP2)+BE2*(EP1+EP2*CTH)*(BE2+EP1*EP2*CTH)* | |
1071 | & (2.*EP1-EP1*CTH+EP2)-BE2*(EP1+EP2*CTH)**2*(BE2-EP1**2*CTH)- | |
1072 | & 1./8.*(BE2+EP1*EP2*CTH)**2*((EP1+EP2)**2+2.*BE2*(1.-CTH))+ | |
1073 | & 1./32.*SH/SQMW*(BE2+EP1*EP2*CTH)**2*(EP1**2-EP2**2)**2) | |
1074 | AUWIM=0. | |
1075 | A4RE=(1.-XW)/SQMZ*(EP1**2*EP2**2*(CTH**2-1.)- | |
1076 | & 2.*BE2*(EP1**2+EP2**2+EP1*EP2)*CTH-2.*BE2*EP1*EP2) | |
1077 | A4IM=0. | |
1078 | FACH=COMFAC*1./(4096.*PARU(1)**2*4.*(1.-XW))*(AEM/XW)**4* | |
1079 | & (SH/SQMW)**2*((ATHRE+ASWRE+AUWRE+A4RE)**2+ | |
1080 | & (ATHIM+ASWIM+AUWIM+A4IM)**2)*SQRT(SQMZ/SQMW) | |
1081 | DO 570 I=MIN1,MAX1 | |
1082 | IF(I.EQ.0.OR.KFAC(1,I).EQ.0) GOTO 570 | |
1083 | EI=KCHG(IABS(I),1)/3. | |
1084 | AI=SIGN(1.,EI) | |
1085 | VI=AI-4.*EI*XW | |
1086 | AVI=AI**2+VI**2 | |
1087 | DO 560 J=MIN2,MAX2 | |
1088 | IF(J.EQ.0.OR.KFAC(2,J).EQ.0) GOTO 560 | |
1089 | EJ=KCHG(IABS(J),1)/3. | |
1090 | AJ=SIGN(1.,EJ) | |
1091 | VJ=AI-4.*EJ*XW | |
1092 | AVJ=AJ**2+VJ**2 | |
1093 | NCHN=NCHN+1 | |
1094 | ISIG(NCHN,1)=I | |
1095 | ISIG(NCHN,2)=J | |
1096 | ISIG(NCHN,3)=1 | |
1097 | SIGH(NCHN)=FACH*(AVI*VINT(180+J)+VINT(180+I)*AVJ) | |
1098 | 560 CONTINUE | |
1099 | 570 CONTINUE | |
1100 | ||
1101 | ELSEIF(ISUB.EQ.75) THEN | |
1102 | C...W+ + W- -> gamma + gamma. | |
1103 | ||
1104 | ELSEIF(ISUB.EQ.76) THEN | |
1105 | C...W+ + W- -> Z0 + Z0. | |
1106 | BE2=SQRT((1.-4.*SQMW/SH)*(1.-4.*SQMZ/SH)) | |
1107 | CTH2=CTH**2 | |
1108 | TH=-0.5*SH*(1.-2.*(SQMW+SQMZ)/SH-BE2*CTH) | |
1109 | UH=-0.5*SH*(1.-2.*(SQMW+SQMZ)/SH+BE2*CTH) | |
1110 | SHANG=4.*SQRT(SQMW/(SQMZ*(1.-XW)))*(1.-2.*SQMW/SH)* | |
1111 | & (1.-2.*SQMZ/SH) | |
1112 | ASHRE=(SH-SQMH)/((SH-SQMH)**2+GMMH**2)*SHANG | |
1113 | ASHIM=-GMMH/((SH-SQMH)**2+GMMH**2)*SHANG | |
1114 | ATWRE=(1.-XW)/SQMZ*SH/(TH-SQMW)*((CTH-BE2)**2*(3./2.+BE2/2.*CTH- | |
1115 | & (SQMW+SQMZ)/SH+(SQMW-SQMZ)**2/(SH*SQMW))+4.*((SQMW+SQMZ)/SH* | |
1116 | & (1.-3.*CTH2)+8.*SQMW*SQMZ/SH2*(2.*CTH2-1.)+ | |
1117 | & 4.*(SQMW**2+SQMZ**2)/SH2*CTH2+2.*(SQMW+SQMZ)/SH*BE2*CTH)) | |
1118 | ATWIM=0. | |
1119 | AUWRE=(1.-XW)/SQMZ*SH/(UH-SQMW)*((CTH+BE2)**2*(3./2.-BE2/2.*CTH- | |
1120 | & (SQMW+SQMZ)/SH+(SQMW-SQMZ)**2/(SH*SQMW))+4.*((SQMW+SQMZ)/SH* | |
1121 | & (1.-3.*CTH2)+8.*SQMW*SQMZ/SH2*(2.*CTH2-1.)+ | |
1122 | & 4.*(SQMW**2+SQMZ**2)/SH2*CTH2-2.*(SQMW+SQMZ)/SH*BE2*CTH)) | |
1123 | AUWIM=0. | |
1124 | A4RE=2.*(1.-XW)/SQMZ*(3.-CTH2-4.*(SQMW+SQMZ)/SH) | |
1125 | A4IM=0. | |
1126 | FACH=0.5*COMFAC*1./(4096.*PARU(1)**2)*(AEM/XW)**4*(SH/SQMW)**2* | |
1127 | & ((ASHRE+ATWRE+AUWRE+A4RE)**2+(ASHIM+ATWIM+AUWIM+A4IM)**2) | |
1128 | DO 590 I=MIN1,MAX1 | |
1129 | IF(I.EQ.0.OR.KFAC(1,I).EQ.0) GOTO 590 | |
1130 | EI=SIGN(1.,FLOAT(I))*KCHG(IABS(I),1) | |
1131 | DO 580 J=MIN2,MAX2 | |
1132 | IF(J.EQ.0.OR.KFAC(2,J).EQ.0) GOTO 580 | |
1133 | EJ=SIGN(1.,FLOAT(J))*KCHG(IABS(J),1) | |
1134 | IF(EI*EJ.GT.0.) GOTO 580 | |
1135 | NCHN=NCHN+1 | |
1136 | ISIG(NCHN,1)=I | |
1137 | ISIG(NCHN,2)=J | |
1138 | ISIG(NCHN,3)=1 | |
1139 | SIGH(NCHN)=FACH*VINT(180+I)*VINT(180+J) | |
1140 | 580 CONTINUE | |
1141 | 590 CONTINUE | |
1142 | ||
1143 | ELSEIF(ISUB.EQ.77) THEN | |
1144 | C...W+/- + W+/- -> W+/- + W+/-. | |
1145 | BE2=1.-4.*SQMW/SH | |
1146 | BE4=BE2**2 | |
1147 | CTH2=CTH**2 | |
1148 | CTH3=CTH**3 | |
1149 | TH=-0.5*SH*BE2*(1.-CTH) | |
1150 | UH=-0.5*SH*BE2*(1.+CTH) | |
1151 | SHANG=(1.+BE2)**2 | |
1152 | ASHRE=(SH-SQMH)/((SH-SQMH)**2+GMMH**2)*SHANG | |
1153 | ASHIM=-GMMH/((SH-SQMH)**2+GMMH**2)*SHANG | |
1154 | THANG=(BE2-CTH)**2 | |
1155 | ATHRE=(TH-SQMH)/((TH-SQMH)**2+GMMH**2)*THANG | |
1156 | ATHIM=-GMMH/((TH-SQMH)**2+GMMH**2)*THANG | |
1157 | SGZANG=1./SQMW*BE2*(3.-BE2)**2*CTH | |
1158 | ASGRE=XW*SGZANG | |
1159 | ASGIM=0. | |
1160 | ASZRE=(1.-XW)*SH/(SH-SQMZ)*SGZANG | |
1161 | ASZIM=0. | |
1162 | TGZANG=1./SQMW*(BE2*(4.-2.*BE2+BE4)+BE2*(4.-10.*BE2+BE4)*CTH+ | |
1163 | & (2.-11.*BE2+10.*BE4)*CTH2+BE2*CTH3) | |
1164 | ATGRE=0.5*XW*SH/TH*TGZANG | |
1165 | ATGIM=0. | |
1166 | ATZRE=0.5*(1.-XW)*SH/(TH-SQMZ)*TGZANG | |
1167 | ATZIM=0. | |
1168 | A4RE=1./SQMW*(1.+2.*BE2-6.*BE2*CTH-CTH2) | |
1169 | A4IM=0. | |
1170 | FACH=COMFAC*1./(4096.*PARU(1)**2)*(AEM/XW)**4*(SH/SQMW)**2* | |
1171 | & ((ASHRE+ATHRE+ASGRE+ASZRE+ATGRE+ATZRE+A4RE)**2+ | |
1172 | & (ASHIM+ATHIM+ASGIM+ASZIM+ATGIM+ATZIM+A4IM)**2) | |
1173 | DO 610 I=MIN1,MAX1 | |
1174 | IF(I.EQ.0.OR.KFAC(1,I).EQ.0) GOTO 610 | |
1175 | EI=SIGN(1.,FLOAT(I))*KCHG(IABS(I),1) | |
1176 | DO 600 J=MIN2,MAX2 | |
1177 | IF(J.EQ.0.OR.KFAC(2,J).EQ.0) GOTO 600 | |
1178 | EJ=SIGN(1.,FLOAT(J))*KCHG(IABS(J),1) | |
1179 | IF(EI*EJ.GT.0.) GOTO 600 | |
1180 | NCHN=NCHN+1 | |
1181 | ISIG(NCHN,1)=I | |
1182 | ISIG(NCHN,2)=J | |
1183 | ISIG(NCHN,3)=1 | |
1184 | SIGH(NCHN)=FACH*VINT(180+I)*VINT(180+J) | |
1185 | 600 CONTINUE | |
1186 | 610 CONTINUE | |
1187 | ||
1188 | ELSEIF(ISUB.EQ.78) THEN | |
1189 | C...W+/- + H0 -> W+/- + H0. | |
1190 | ||
1191 | ELSEIF(ISUB.EQ.79) THEN | |
1192 | C...H0 + H0 -> H0 + H0. | |
1193 | ||
1194 | ENDIF | |
1195 | ||
1196 | C...C: 2 -> 2, tree diagrams with masses. | |
1197 | ||
1198 | ELSEIF(ISUB.LE.90) THEN | |
1199 | IF(ISUB.EQ.81) THEN | |
1200 | C...q + qb -> Q + QB. | |
1201 | FACQQB=COMFAC*AS**2*4./9.*(((TH-SQM3)**2+ | |
1202 | & (UH-SQM3)**2)/SH2+2.*SQM3/SH) | |
1203 | IF(MSTP(35).GE.1) THEN | |
1204 | IF(MSTP(35).EQ.1) THEN | |
1205 | ALSSG=PARP(35) | |
1206 | ELSE | |
1207 | MST115=MSTU(115) | |
1208 | MSTU(115)=MSTP(36) | |
1209 | Q2BN=SQRT(SQM3*((SQRT(SH)-2.*SQRT(SQM3))**2+PARP(36)**2)) | |
1210 | ALSSG=ULALPS_HIJING(Q2BN) | |
1211 | MSTU(115)=MST115 | |
1212 | ENDIF | |
1213 | XREPU=PARU(1)*ALSSG/(6.*SQRT(MAX(1E-20,1.-4.*SQM3/SH))) | |
1214 | FREPU=XREPU/(EXP(MIN(100.,XREPU))-1.) | |
1215 | PARI(81)=FREPU | |
1216 | FACQQB=FACQQB*FREPU | |
1217 | ENDIF | |
1218 | DO 620 I=MINA,MAXA | |
1219 | IF(I.EQ.0.OR.KFAC(1,I)*KFAC(2,-I).EQ.0) GOTO 620 | |
1220 | NCHN=NCHN+1 | |
1221 | ISIG(NCHN,1)=I | |
1222 | ISIG(NCHN,2)=-I | |
1223 | ISIG(NCHN,3)=1 | |
1224 | SIGH(NCHN)=FACQQB | |
1225 | 620 CONTINUE | |
1226 | ||
1227 | ELSEIF(ISUB.EQ.82) THEN | |
1228 | C...g + g -> Q + QB. | |
1229 | FACQQ1=COMFAC*FACA*AS**2*1./6.*((UH-SQM3)/(TH-SQM3)- | |
1230 | & 2.*(UH-SQM3)**2/SH2+4.*SQM3/SH*(TH*UH-SQM3**2)/(TH-SQM3)**2) | |
1231 | FACQQ2=COMFAC*FACA*AS**2*1./6.*((TH-SQM3)/(UH-SQM3)- | |
1232 | & 2.*(TH-SQM3)**2/SH2+4.*SQM3/SH*(TH*UH-SQM3**2)/(UH-SQM3)**2) | |
1233 | IF(MSTP(35).GE.1) THEN | |
1234 | IF(MSTP(35).EQ.1) THEN | |
1235 | ALSSG=PARP(35) | |
1236 | ELSE | |
1237 | MST115=MSTU(115) | |
1238 | MSTU(115)=MSTP(36) | |
1239 | Q2BN=SQRT(SQM3*((SQRT(SH)-2.*SQRT(SQM3))**2+PARP(36)**2)) | |
1240 | ALSSG=ULALPS_HIJING(Q2BN) | |
1241 | MSTU(115)=MST115 | |
1242 | ENDIF | |
1243 | XATTR=4.*PARU(1)*ALSSG/(3.*SQRT(MAX(1E-20,1.-4.*SQM3/SH))) | |
1244 | FATTR=XATTR/(1.-EXP(-MIN(100.,XATTR))) | |
1245 | XREPU=PARU(1)*ALSSG/(6.*SQRT(MAX(1E-20,1.-4.*SQM3/SH))) | |
1246 | FREPU=XREPU/(EXP(MIN(100.,XREPU))-1.) | |
1247 | FATRE=(2.*FATTR+5.*FREPU)/7. | |
1248 | PARI(81)=FATRE | |
1249 | FACQQ1=FACQQ1*FATRE | |
1250 | FACQQ2=FACQQ2*FATRE | |
1251 | ENDIF | |
1252 | IF(KFAC(1,21)*KFAC(2,21).EQ.0) GOTO 630 | |
1253 | NCHN=NCHN+1 | |
1254 | ISIG(NCHN,1)=21 | |
1255 | ISIG(NCHN,2)=21 | |
1256 | ISIG(NCHN,3)=1 | |
1257 | SIGH(NCHN)=FACQQ1 | |
1258 | NCHN=NCHN+1 | |
1259 | ISIG(NCHN,1)=21 | |
1260 | ISIG(NCHN,2)=21 | |
1261 | ISIG(NCHN,3)=2 | |
1262 | SIGH(NCHN)=FACQQ2 | |
1263 | 630 CONTINUE | |
1264 | ||
1265 | ENDIF | |
1266 | ||
1267 | C...D: Mimimum bias processes. | |
1268 | ||
1269 | ELSEIF(ISUB.LE.100) THEN | |
1270 | IF(ISUB.EQ.91) THEN | |
1271 | C...Elastic scattering. | |
1272 | SIGS=XSEC(ISUB,1) | |
1273 | ||
1274 | ELSEIF(ISUB.EQ.92) THEN | |
1275 | C...Single diffractive scattering. | |
1276 | SIGS=XSEC(ISUB,1) | |
1277 | ||
1278 | ELSEIF(ISUB.EQ.93) THEN | |
1279 | C...Double diffractive scattering. | |
1280 | SIGS=XSEC(ISUB,1) | |
1281 | ||
1282 | ELSEIF(ISUB.EQ.94) THEN | |
1283 | C...Central diffractive scattering. | |
1284 | SIGS=XSEC(ISUB,1) | |
1285 | ||
1286 | ELSEIF(ISUB.EQ.95) THEN | |
1287 | C...Low-pT scattering. | |
1288 | SIGS=XSEC(ISUB,1) | |
1289 | ||
1290 | ELSEIF(ISUB.EQ.96) THEN | |
1291 | C...Multiple interactions: sum of QCD processes. | |
1292 | CALL PYWIDT_HIJING(21,SQRT(SH),WDTP,WDTE) | |
1293 | ||
1294 | C...q + q' -> q + q'. | |
1295 | FACQQ1=COMFAC*AS**2*4./9.*(SH2+UH2)/TH2 | |
1296 | FACQQB=COMFAC*AS**2*4./9.*((SH2+UH2)/TH2*FACA- | |
1297 | & MSTP(34)*2./3.*UH2/(SH*TH)) | |
1298 | FACQQ2=COMFAC*AS**2*4./9.*((SH2+TH2)/UH2- | |
1299 | & MSTP(34)*2./3.*SH2/(TH*UH)) | |
1300 | DO 650 I=-3,3 | |
1301 | IF(I.EQ.0) GOTO 650 | |
1302 | DO 640 J=-3,3 | |
1303 | IF(J.EQ.0) GOTO 640 | |
1304 | NCHN=NCHN+1 | |
1305 | ISIG(NCHN,1)=I | |
1306 | ISIG(NCHN,2)=J | |
1307 | ISIG(NCHN,3)=111 | |
1308 | SIGH(NCHN)=FACQQ1 | |
1309 | IF(I.EQ.-J) SIGH(NCHN)=FACQQB | |
1310 | IF(I.EQ.J) THEN | |
1311 | SIGH(NCHN)=0.5*SIGH(NCHN) | |
1312 | NCHN=NCHN+1 | |
1313 | ISIG(NCHN,1)=I | |
1314 | ISIG(NCHN,2)=J | |
1315 | ISIG(NCHN,3)=112 | |
1316 | SIGH(NCHN)=0.5*FACQQ2 | |
1317 | ENDIF | |
1318 | 640 CONTINUE | |
1319 | 650 CONTINUE | |
1320 | ||
1321 | C...q + qb -> q' + qb' or g + g. | |
1322 | FACQQB=COMFAC*AS**2*4./9.*(TH2+UH2)/SH2*(WDTE(0,1)+WDTE(0,2)+ | |
1323 | & WDTE(0,3)+WDTE(0,4)) | |
1324 | FACGG1=COMFAC*AS**2*32./27.*(UH/TH-(2.+MSTP(34)*1./4.)*UH2/SH2) | |
1325 | FACGG2=COMFAC*AS**2*32./27.*(TH/UH-(2.+MSTP(34)*1./4.)*TH2/SH2) | |
1326 | DO 660 I=-3,3 | |
1327 | IF(I.EQ.0) GOTO 660 | |
1328 | NCHN=NCHN+1 | |
1329 | ISIG(NCHN,1)=I | |
1330 | ISIG(NCHN,2)=-I | |
1331 | ISIG(NCHN,3)=121 | |
1332 | SIGH(NCHN)=FACQQB | |
1333 | NCHN=NCHN+1 | |
1334 | ISIG(NCHN,1)=I | |
1335 | ISIG(NCHN,2)=-I | |
1336 | ISIG(NCHN,3)=131 | |
1337 | SIGH(NCHN)=0.5*FACGG1 | |
1338 | NCHN=NCHN+1 | |
1339 | ISIG(NCHN,1)=I | |
1340 | ISIG(NCHN,2)=-I | |
1341 | ISIG(NCHN,3)=132 | |
1342 | SIGH(NCHN)=0.5*FACGG2 | |
1343 | 660 CONTINUE | |
1344 | ||
1345 | C...q + g -> q + g. | |
1346 | FACQG1=COMFAC*AS**2*4./9.*((2.+MSTP(34)*1./4.)*UH2/TH2-UH/SH)* | |
1347 | & FACA | |
1348 | FACQG2=COMFAC*AS**2*4./9.*((2.+MSTP(34)*1./4.)*SH2/TH2-SH/UH) | |
1349 | DO 680 I=-3,3 | |
1350 | IF(I.EQ.0) GOTO 680 | |
1351 | DO 670 ISDE=1,2 | |
1352 | NCHN=NCHN+1 | |
1353 | ISIG(NCHN,ISDE)=I | |
1354 | ISIG(NCHN,3-ISDE)=21 | |
1355 | ISIG(NCHN,3)=281 | |
1356 | SIGH(NCHN)=FACQG1 | |
1357 | NCHN=NCHN+1 | |
1358 | ISIG(NCHN,ISDE)=I | |
1359 | ISIG(NCHN,3-ISDE)=21 | |
1360 | ISIG(NCHN,3)=282 | |
1361 | SIGH(NCHN)=FACQG2 | |
1362 | 670 CONTINUE | |
1363 | 680 CONTINUE | |
1364 | ||
1365 | C...g + g -> q + qb or g + g. | |
1366 | FACQQ1=COMFAC*AS**2*1./6.*(UH/TH-(2.+MSTP(34)*1./4.)*UH2/SH2)* | |
1367 | & (WDTE(0,1)+WDTE(0,2)+WDTE(0,3)+WDTE(0,4))*FACA | |
1368 | FACQQ2=COMFAC*AS**2*1./6.*(TH/UH-(2.+MSTP(34)*1./4.)*TH2/SH2)* | |
1369 | & (WDTE(0,1)+WDTE(0,2)+WDTE(0,3)+WDTE(0,4))*FACA | |
1370 | FACGG1=COMFAC*AS**2*9./4.*(SH2/TH2+2.*SH/TH+3.+2.*TH/SH+ | |
1371 | & TH2/SH2)*FACA | |
1372 | FACGG2=COMFAC*AS**2*9./4.*(UH2/SH2+2.*UH/SH+3.+2.*SH/UH+ | |
1373 | & SH2/UH2)*FACA | |
1374 | FACGG3=COMFAC*AS**2*9./4.*(TH2/UH2+2.*TH/UH+3+2.*UH/TH+UH2/TH2) | |
1375 | NCHN=NCHN+1 | |
1376 | ISIG(NCHN,1)=21 | |
1377 | ISIG(NCHN,2)=21 | |
1378 | ISIG(NCHN,3)=531 | |
1379 | SIGH(NCHN)=FACQQ1 | |
1380 | NCHN=NCHN+1 | |
1381 | ISIG(NCHN,1)=21 | |
1382 | ISIG(NCHN,2)=21 | |
1383 | ISIG(NCHN,3)=532 | |
1384 | SIGH(NCHN)=FACQQ2 | |
1385 | NCHN=NCHN+1 | |
1386 | ISIG(NCHN,1)=21 | |
1387 | ISIG(NCHN,2)=21 | |
1388 | ISIG(NCHN,3)=681 | |
1389 | SIGH(NCHN)=0.5*FACGG1 | |
1390 | NCHN=NCHN+1 | |
1391 | ISIG(NCHN,1)=21 | |
1392 | ISIG(NCHN,2)=21 | |
1393 | ISIG(NCHN,3)=682 | |
1394 | SIGH(NCHN)=0.5*FACGG2 | |
1395 | NCHN=NCHN+1 | |
1396 | ISIG(NCHN,1)=21 | |
1397 | ISIG(NCHN,2)=21 | |
1398 | ISIG(NCHN,3)=683 | |
1399 | SIGH(NCHN)=0.5*FACGG3 | |
1400 | ENDIF | |
1401 | ||
1402 | C...E: 2 -> 1, loop diagrams. | |
1403 | ||
1404 | ELSEIF(ISUB.LE.110) THEN | |
1405 | IF(ISUB.EQ.101) THEN | |
1406 | C...g + g -> gamma*/Z0. | |
1407 | ||
1408 | ELSEIF(ISUB.EQ.102) THEN | |
1409 | C...g + g -> H0. | |
1410 | CALL PYWIDT_HIJING(25,SQRT(SH),WDTP,WDTE) | |
1411 | ETARE=0. | |
1412 | ETAIM=0. | |
1413 | DO 690 I=1,2*MSTP(1) | |
1414 | EPS=4.*PMAS(I,1)**2/SH | |
1415 | IF(EPS.LE.1.) THEN | |
1416 | IF(EPS.GT.1.E-4) THEN | |
1417 | ROOT=SQRT(1.-EPS) | |
1418 | RLN=LOG((1.+ROOT)/(1.-ROOT)) | |
1419 | ELSE | |
1420 | RLN=LOG(4./EPS-2.) | |
1421 | ENDIF | |
1422 | PHIRE=0.25*(RLN**2-PARU(1)**2) | |
1423 | PHIIM=0.5*PARU(1)*RLN | |
1424 | ELSE | |
1425 | PHIRE=-(ASIN(1./SQRT(EPS)))**2 | |
1426 | PHIIM=0. | |
1427 | ENDIF | |
1428 | ETARE=ETARE+0.5*EPS*(1.+(EPS-1.)*PHIRE) | |
1429 | ETAIM=ETAIM+0.5*EPS*(EPS-1.)*PHIIM | |
1430 | 690 CONTINUE | |
1431 | ETA2=ETARE**2+ETAIM**2 | |
1432 | FACH=COMFAC*FACA*(AS/PARU(1)*AEM/XW)**2*1./512.* | |
1433 | & (SH/SQMW)**2*ETA2*SH2/((SH-SQMH)**2+GMMH**2)* | |
1434 | & (WDTE(0,1)+WDTE(0,2)+WDTE(0,4)) | |
1435 | IF(KFAC(1,21)*KFAC(2,21).EQ.0) GOTO 700 | |
1436 | NCHN=NCHN+1 | |
1437 | ISIG(NCHN,1)=21 | |
1438 | ISIG(NCHN,2)=21 | |
1439 | ISIG(NCHN,3)=1 | |
1440 | SIGH(NCHN)=FACH | |
1441 | 700 CONTINUE | |
1442 | ||
1443 | ENDIF | |
1444 | ||
1445 | C...F: 2 -> 2, box diagrams. | |
1446 | ||
1447 | ELSEIF(ISUB.LE.120) THEN | |
1448 | IF(ISUB.EQ.111) THEN | |
1449 | C...f + fb -> g + H0 (q + qb -> g + H0 only). | |
1450 | A5STUR=0. | |
1451 | A5STUI=0. | |
1452 | DO 710 I=1,2*MSTP(1) | |
1453 | SQMQ=PMAS(I,1)**2 | |
1454 | EPSS=4.*SQMQ/SH | |
1455 | EPSH=4.*SQMQ/SQMH | |
1456 | A5STUR=A5STUR+SQMQ/SQMH*(4.+4.*SH/(TH+UH)*(PYW1AU_HIJING(EPSS,1) | |
1457 | $ -PYW1AU_HIJING(EPSH,1))+(1.-4.*SQMQ/(TH+UH)) | |
1458 | $ *(PYW2AU_HIJING(EPSS,1)-PYW2AU_HIJING(EPSH,1))) | |
1459 | A5STUI=A5STUI+SQMQ/SQMH*(4.*SH/(TH+UH)*(PYW1AU_HIJING(EPSS,2)- | |
1460 | & PYW1AU_HIJING(EPSH,2))+(1.-4.*SQMQ/(TH+UH)) | |
1461 | $ *(PYW2AU_HIJING(EPSS,2)-PYW2AU_HIJING(EPSH,2))) | |
1462 | 710 CONTINUE | |
1463 | FACGH=COMFAC*FACA/(144.*PARU(1)**2)*AEM/XW*AS**3*SQMH/SQMW* | |
1464 | & SQMH/SH*(UH**2+TH**2)/(UH+TH)**2*(A5STUR**2+A5STUI**2) | |
1465 | FACGH=FACGH*WIDS(25,2) | |
1466 | DO 720 I=MINA,MAXA | |
1467 | IF(I.EQ.0.OR.KFAC(1,I)*KFAC(2,-I).EQ.0) GOTO 720 | |
1468 | NCHN=NCHN+1 | |
1469 | ISIG(NCHN,1)=I | |
1470 | ISIG(NCHN,2)=-I | |
1471 | ISIG(NCHN,3)=1 | |
1472 | SIGH(NCHN)=FACGH | |
1473 | 720 CONTINUE | |
1474 | ||
1475 | ELSEIF(ISUB.EQ.112) THEN | |
1476 | C...f + g -> f + H0 (q + g -> q + H0 only). | |
1477 | A5TSUR=0. | |
1478 | A5TSUI=0. | |
1479 | DO 730 I=1,2*MSTP(1) | |
1480 | SQMQ=PMAS(I,1)**2 | |
1481 | EPST=4.*SQMQ/TH | |
1482 | EPSH=4.*SQMQ/SQMH | |
1483 | A5TSUR=A5TSUR+SQMQ/SQMH*(4.+4.*TH/(SH+UH)*(PYW1AU_HIJING(EPST,1) | |
1484 | $ -PYW1AU_HIJING(EPSH,1))+(1.-4.*SQMQ/(SH+UH)) | |
1485 | $ *(PYW2AU_HIJING(EPST,1)-PYW2AU_HIJING(EPSH,1))) | |
1486 | A5TSUI=A5TSUI+SQMQ/SQMH*(4.*TH/(SH+UH)*(PYW1AU_HIJING(EPST,2)- | |
1487 | & PYW1AU_HIJING(EPSH,2))+(1.-4.*SQMQ/(SH+UH)) | |
1488 | $ *(PYW2AU_HIJING(EPST,2)-PYW2AU_HIJING(EPSH,2))) | |
1489 | 730 CONTINUE | |
1490 | FACQH=COMFAC*FACA/(384.*PARU(1)**2)*AEM/XW*AS**3*SQMH/SQMW* | |
1491 | & SQMH/(-TH)*(UH**2+SH**2)/(UH+SH)**2*(A5TSUR**2+A5TSUI**2) | |
1492 | FACQH=FACQH*WIDS(25,2) | |
1493 | DO 750 I=MINA,MAXA | |
1494 | IF(I.EQ.0) GOTO 750 | |
1495 | DO 740 ISDE=1,2 | |
1496 | IF(ISDE.EQ.1.AND.KFAC(1,I)*KFAC(2,21).EQ.0) GOTO 740 | |
1497 | IF(ISDE.EQ.2.AND.KFAC(1,21)*KFAC(2,I).EQ.0) GOTO 740 | |
1498 | NCHN=NCHN+1 | |
1499 | ISIG(NCHN,ISDE)=I | |
1500 | ISIG(NCHN,3-ISDE)=21 | |
1501 | ISIG(NCHN,3)=1 | |
1502 | SIGH(NCHN)=FACQH | |
1503 | 740 CONTINUE | |
1504 | 750 CONTINUE | |
1505 | ||
1506 | ELSEIF(ISUB.EQ.113) THEN | |
1507 | C...g + g -> g + H0. | |
1508 | A2STUR=0. | |
1509 | A2STUI=0. | |
1510 | A2USTR=0. | |
1511 | A2USTI=0. | |
1512 | A2TUSR=0. | |
1513 | A2TUSI=0. | |
1514 | A4STUR=0. | |
1515 | A4STUI=0. | |
1516 | DO 760 I=6,2*MSTP(1) | |
1517 | C'''Only t-quarks yet included | |
1518 | SQMQ=PMAS(I,1)**2 | |
1519 | EPSS=4.*SQMQ/SH | |
1520 | EPST=4.*SQMQ/TH | |
1521 | EPSU=4.*SQMQ/UH | |
1522 | EPSH=4.*SQMQ/SQMH | |
1523 | IF(EPSH.LT.1.E-6) GOTO 760 | |
1524 | BESTU=0.5*(1.+SQRT(1.+EPSS*TH/UH)) | |
1525 | BEUST=0.5*(1.+SQRT(1.+EPSU*SH/TH)) | |
1526 | BETUS=0.5*(1.+SQRT(1.+EPST*UH/SH)) | |
1527 | BEUTS=BESTU | |
1528 | BETSU=BEUST | |
1529 | BESUT=BETUS | |
1530 | W3STUR=PYI3AU_HIJING(BESTU,EPSH,1)-PYI3AU_HIJING(BESTU,EPSS,1)- | |
1531 | & PYI3AU_HIJING(BESTU,EPSU,1) | |
1532 | W3STUI=PYI3AU_HIJING(BESTU,EPSH,2)-PYI3AU_HIJING(BESTU,EPSS,2)- | |
1533 | & PYI3AU_HIJING(BESTU,EPSU,2) | |
1534 | W3SUTR=PYI3AU_HIJING(BESUT,EPSH,1)-PYI3AU_HIJING(BESUT,EPSS,1)- | |
1535 | & PYI3AU_HIJING(BESUT,EPST,1) | |
1536 | W3SUTI=PYI3AU_HIJING(BESUT,EPSH,2)-PYI3AU_HIJING(BESUT,EPSS,2)- | |
1537 | & PYI3AU_HIJING(BESUT,EPST,2) | |
1538 | W3TSUR=PYI3AU_HIJING(BETSU,EPSH,1)-PYI3AU_HIJING(BETSU,EPST,1)- | |
1539 | & PYI3AU_HIJING(BETSU,EPSU,1) | |
1540 | W3TSUI=PYI3AU_HIJING(BETSU,EPSH,2)-PYI3AU_HIJING(BETSU,EPST,2)- | |
1541 | & PYI3AU_HIJING(BETSU,EPSU,2) | |
1542 | W3TUSR=PYI3AU_HIJING(BETUS,EPSH,1)-PYI3AU_HIJING(BETUS,EPST,1)- | |
1543 | & PYI3AU_HIJING(BETUS,EPSS,1) | |
1544 | W3TUSI=PYI3AU_HIJING(BETUS,EPSH,2)-PYI3AU_HIJING(BETUS,EPST,2)- | |
1545 | & PYI3AU_HIJING(BETUS,EPSS,2) | |
1546 | W3USTR=PYI3AU_HIJING(BEUST,EPSH,1)-PYI3AU_HIJING(BEUST,EPSU,1)- | |
1547 | & PYI3AU_HIJING(BEUST,EPST,1) | |
1548 | W3USTI=PYI3AU_HIJING(BEUST,EPSH,2)-PYI3AU_HIJING(BEUST,EPSU,2)- | |
1549 | & PYI3AU_HIJING(BEUST,EPST,2) | |
1550 | W3UTSR=PYI3AU_HIJING(BEUTS,EPSH,1)-PYI3AU_HIJING(BEUTS,EPSU,1)- | |
1551 | & PYI3AU_HIJING(BEUTS,EPSS,1) | |
1552 | W3UTSI=PYI3AU_HIJING(BEUTS,EPSH,2)-PYI3AU_HIJING(BEUTS,EPSU,2)- | |
1553 | & PYI3AU_HIJING(BEUTS,EPSS,2) | |
1554 | B2STUR=SQMQ/SQMH**2*(SH*(UH-SH)/(SH+UH)+2.*TH*UH*(UH+2.*SH)/ | |
1555 | & (SH+UH)**2*(PYW1AU_HIJING(EPST,1)-PYW1AU_HIJING(EPSH,1)) | |
1556 | $ +(SQMQ-SH/4.)*(0.5*PYW2AU_HIJING(EPSS,1)+0.5 | |
1557 | $ *PYW2AU_HIJING(EPSH,1)-PYW2AU_HIJING(EPST,1)+W3STUR)+SH**2 | |
1558 | $ *(2.*SQMQ/(SH+UH)**2-0.5/(SH+UH))*(PYW2AU_HIJING(EPST,1) | |
1559 | $ -PYW2AU_HIJING(EPSH,1))+0.5*TH*UH/SH*(PYW2AU_HIJING(EPSH,1) | |
1560 | $ -2.*PYW2AU_HIJING(EPST,1))+0.125*(SH-12.*SQMQ-4.*TH*UH/SH) | |
1561 | $ *W3TSUR) | |
1562 | B2STUI=SQMQ/SQMH**2*(2.*TH*UH*(UH+2.*SH)/(SH+UH)**2* | |
1563 | & (PYW1AU_HIJING(EPST,2)-PYW1AU_HIJING(EPSH,2))+(SQMQ-SH/4.)* | |
1564 | & (0.5*PYW2AU_HIJING(EPSS,2)+0.5*PYW2AU_HIJING(EPSH,2) | |
1565 | $ -PYW2AU_HIJING(EPST,2)+W3STUI)+SH**2*(2.*SQMQ/(SH+UH)**2-0 | |
1566 | $ .5/(SH+UH))*(PYW2AU_HIJING(EPST,2)-PYW2AU_HIJING(EPSH,2))+0 | |
1567 | $ .5*TH*UH/SH*(PYW2AU_HIJING(EPSH,2)-2.*PYW2AU_HIJING(EPST,2) | |
1568 | $ )+0.125*(SH-12.*SQMQ-4.*TH*UH/SH)*W3TSUI) | |
1569 | B2SUTR=SQMQ/SQMH**2*(SH*(TH-SH)/(SH+TH)+2.*UH*TH*(TH+2.*SH)/ | |
1570 | & (SH+TH)**2*(PYW1AU_HIJING(EPSU,1)-PYW1AU_HIJING(EPSH,1)) | |
1571 | $ +(SQMQ-SH/4.)*(0.5*PYW2AU_HIJING(EPSS,1)+0.5 | |
1572 | $ *PYW2AU_HIJING(EPSH,1)-PYW2AU_HIJING(EPSU,1)+W3SUTR)+SH**2 | |
1573 | $ *(2.*SQMQ/(SH+TH)**2-0.5/(SH+TH))*(PYW2AU_HIJING(EPSU,1) | |
1574 | $ -PYW2AU_HIJING(EPSH,1))+0.5*UH*TH/SH*(PYW2AU_HIJING(EPSH,1) | |
1575 | $ -2.*PYW2AU_HIJING(EPSU,1))+0.125*(SH-12.*SQMQ-4.*UH*TH/SH) | |
1576 | $ *W3USTR) | |
1577 | B2SUTI=SQMQ/SQMH**2*(2.*UH*TH*(TH+2.*SH)/(SH+TH)**2* | |
1578 | & (PYW1AU_HIJING(EPSU,2)-PYW1AU_HIJING(EPSH,2))+(SQMQ-SH/4.)* | |
1579 | & (0.5*PYW2AU_HIJING(EPSS,2)+0.5*PYW2AU_HIJING(EPSH,2) | |
1580 | $ -PYW2AU_HIJING(EPSU,2)+W3SUTI)+SH**2*(2.*SQMQ/(SH+TH)**2-0 | |
1581 | $ .5/(SH+TH))*(PYW2AU_HIJING(EPSU,2)-PYW2AU_HIJING(EPSH,2))+0 | |
1582 | $ .5*UH*TH/SH*(PYW2AU_HIJING(EPSH,2)-2.*PYW2AU_HIJING(EPSU,2) | |
1583 | $ )+0.125*(SH-12.*SQMQ-4.*UH*TH/SH)*W3USTI) | |
1584 | B2TSUR=SQMQ/SQMH**2*(TH*(UH-TH)/(TH+UH)+2.*SH*UH*(UH+2.*TH)/ | |
1585 | & (TH+UH)**2*(PYW1AU_HIJING(EPSS,1)-PYW1AU_HIJING(EPSH,1)) | |
1586 | $ +(SQMQ-TH/4.)*(0.5*PYW2AU_HIJING(EPST,1)+0.5 | |
1587 | $ *PYW2AU_HIJING(EPSH,1)-PYW2AU_HIJING(EPSS,1)+W3TSUR)+TH**2 | |
1588 | $ *(2.*SQMQ/(TH+UH)**2-0.5/(TH+UH))*(PYW2AU_HIJING(EPSS,1) | |
1589 | $ -PYW2AU_HIJING(EPSH,1))+0.5*SH*UH/TH*(PYW2AU_HIJING(EPSH,1) | |
1590 | $ -2.*PYW2AU_HIJING(EPSS,1))+0.125*(TH-12.*SQMQ-4.*SH*UH/TH) | |
1591 | $ *W3STUR) | |
1592 | B2TSUI=SQMQ/SQMH**2*(2.*SH*UH*(UH+2.*TH)/(TH+UH)**2* | |
1593 | & (PYW1AU_HIJING(EPSS,2)-PYW1AU_HIJING(EPSH,2))+(SQMQ-TH/4.)* | |
1594 | & (0.5*PYW2AU_HIJING(EPST,2)+0.5*PYW2AU_HIJING(EPSH,2) | |
1595 | $ -PYW2AU_HIJING(EPSS,2)+W3TSUI)+TH**2*(2.*SQMQ/(TH+UH)**2-0 | |
1596 | $ .5/(TH+UH))*(PYW2AU_HIJING(EPSS,2)-PYW2AU_HIJING(EPSH,2))+0 | |
1597 | $ .5*SH*UH/TH*(PYW2AU_HIJING(EPSH,2)-2.*PYW2AU_HIJING(EPSS,2) | |
1598 | $ )+0.125*(TH-12.*SQMQ-4.*SH*UH/TH)*W3STUI) | |
1599 | B2TUSR=SQMQ/SQMH**2*(TH*(SH-TH)/(TH+SH)+2.*UH*SH*(SH+2.*TH)/ | |
1600 | & (TH+SH)**2*(PYW1AU_HIJING(EPSU,1)-PYW1AU_HIJING(EPSH,1)) | |
1601 | $ +(SQMQ-TH/4.)*(0.5*PYW2AU_HIJING(EPST,1)+0.5 | |
1602 | $ *PYW2AU_HIJING(EPSH,1)-PYW2AU_HIJING(EPSU,1)+W3TUSR)+TH**2 | |
1603 | $ *(2.*SQMQ/(TH+SH)**2-0.5/(TH+SH))*(PYW2AU_HIJING(EPSU,1) | |
1604 | $ -PYW2AU_HIJING(EPSH,1))+0.5*UH*SH/TH*(PYW2AU_HIJING(EPSH,1) | |
1605 | $ -2.*PYW2AU_HIJING(EPSU,1))+0.125*(TH-12.*SQMQ-4.*UH*SH/TH) | |
1606 | $ *W3UTSR) | |
1607 | B2TUSI=SQMQ/SQMH**2*(2.*UH*SH*(SH+2.*TH)/(TH+SH)**2* | |
1608 | & (PYW1AU_HIJING(EPSU,2)-PYW1AU_HIJING(EPSH,2))+(SQMQ-TH/4.)* | |
1609 | & (0.5*PYW2AU_HIJING(EPST,2)+0.5*PYW2AU_HIJING(EPSH,2) | |
1610 | $ -PYW2AU_HIJING(EPSU,2)+W3TUSI)+TH**2*(2.*SQMQ/(TH+SH)**2-0 | |
1611 | $ .5/(TH+SH))*(PYW2AU_HIJING(EPSU,2)-PYW2AU_HIJING(EPSH,2))+0 | |
1612 | $ .5*UH*SH/TH*(PYW2AU_HIJING(EPSH,2)-2.*PYW2AU_HIJING(EPSU,2) | |
1613 | $ )+0.125*(TH-12.*SQMQ-4.*UH*SH/TH)*W3UTSI) | |
1614 | B2USTR=SQMQ/SQMH**2*(UH*(TH-UH)/(UH+TH)+2.*SH*TH*(TH+2.*UH)/ | |
1615 | & (UH+TH)**2*(PYW1AU_HIJING(EPSS,1)-PYW1AU_HIJING(EPSH,1)) | |
1616 | $ +(SQMQ-UH/4.)*(0.5*PYW2AU_HIJING(EPSU,1)+0.5 | |
1617 | $ *PYW2AU_HIJING(EPSH,1)-PYW2AU_HIJING(EPSS,1)+W3USTR)+UH**2 | |
1618 | $ *(2.*SQMQ/(UH+TH)**2-0.5/(UH+TH))*(PYW2AU_HIJING(EPSS,1) | |
1619 | $ -PYW2AU_HIJING(EPSH,1))+0.5*SH*TH/UH*(PYW2AU_HIJING(EPSH,1) | |
1620 | $ -2.*PYW2AU_HIJING(EPSS,1))+0.125*(UH-12.*SQMQ-4.*SH*TH/UH) | |
1621 | $ *W3SUTR) | |
1622 | B2USTI=SQMQ/SQMH**2*(2.*SH*TH*(TH+2.*UH)/(UH+TH)**2* | |
1623 | & (PYW1AU_HIJING(EPSS,2)-PYW1AU_HIJING(EPSH,2))+(SQMQ-UH/4.)* | |
1624 | & (0.5*PYW2AU_HIJING(EPSU,2)+0.5*PYW2AU_HIJING(EPSH,2) | |
1625 | $ -PYW2AU_HIJING(EPSS,2)+W3USTI)+UH**2*(2.*SQMQ/(UH+TH)**2-0 | |
1626 | $ .5/(UH+TH))*(PYW2AU_HIJING(EPSS,2)-PYW2AU_HIJING(EPSH,2))+0 | |
1627 | $ .5*SH*TH/UH*(PYW2AU_HIJING(EPSH,2)-2.*PYW2AU_HIJING(EPSS,2) | |
1628 | $ )+0.125*(UH-12.*SQMQ-4.*SH*TH/UH)*W3SUTI) | |
1629 | B2UTSR=SQMQ/SQMH**2*(UH*(SH-UH)/(UH+SH)+2.*TH*SH*(SH+2.*UH)/ | |
1630 | & (UH+SH)**2*(PYW1AU_HIJING(EPST,1)-PYW1AU_HIJING(EPSH,1)) | |
1631 | $ +(SQMQ-UH/4.)*(0.5*PYW2AU_HIJING(EPSU,1)+0.5 | |
1632 | $ *PYW2AU_HIJING(EPSH,1)-PYW2AU_HIJING(EPST,1)+W3UTSR)+UH**2 | |
1633 | $ *(2.*SQMQ/(UH+SH)**2-0.5/(UH+SH))*(PYW2AU_HIJING(EPST,1) | |
1634 | $ -PYW2AU_HIJING(EPSH,1))+0.5*TH*SH/UH*(PYW2AU_HIJING(EPSH,1) | |
1635 | $ -2.*PYW2AU_HIJING(EPST,1))+0.125*(UH-12.*SQMQ-4.*TH*SH/UH) | |
1636 | $ *W3TUSR) | |
1637 | B2UTSI=SQMQ/SQMH**2*(2.*TH*SH*(SH+2.*UH)/(UH+SH)**2* | |
1638 | & (PYW1AU_HIJING(EPST,2)-PYW1AU_HIJING(EPSH,2))+(SQMQ-UH/4.)* | |
1639 | & (0.5*PYW2AU_HIJING(EPSU,2)+0.5*PYW2AU_HIJING(EPSH,2) | |
1640 | $ -PYW2AU_HIJING(EPST,2)+W3UTSI)+UH**2*(2.*SQMQ/(UH+SH)**2-0 | |
1641 | $ .5/(UH+SH))*(PYW2AU_HIJING(EPST,2)-PYW2AU_HIJING(EPSH,2))+0 | |
1642 | $ .5*TH*SH/UH*(PYW2AU_HIJING(EPSH,2)-2.*PYW2AU_HIJING(EPST,2) | |
1643 | $ )+0.125*(UH-12.*SQMQ-4.*TH*SH/UH)*W3TUSI) | |
1644 | B4STUR=SQMQ/SQMH*(-2./3.+(SQMQ/SQMH-1./4.)*(PYW2AU_HIJING(EPSS,1 | |
1645 | $ )-PYW2AU_HIJING(EPSH,1)+W3STUR)) | |
1646 | B4STUI=SQMQ/SQMH*(SQMQ/SQMH-1./4.)*(PYW2AU_HIJING(EPSS,2)- | |
1647 | & PYW2AU_HIJING(EPSH,2)+W3STUI) | |
1648 | B4TUSR=SQMQ/SQMH*(-2./3.+(SQMQ/SQMH-1./4.)*(PYW2AU_HIJING(EPST,1 | |
1649 | $ )-PYW2AU_HIJING(EPSH,1)+W3TUSR)) | |
1650 | B4TUSI=SQMQ/SQMH*(SQMQ/SQMH-1./4.)*(PYW2AU_HIJING(EPST,2)- | |
1651 | & PYW2AU_HIJING(EPSH,2)+W3TUSI) | |
1652 | B4USTR=SQMQ/SQMH*(-2./3.+(SQMQ/SQMH-1./4.)*(PYW2AU_HIJING(EPSU,1 | |
1653 | $ )-PYW2AU_HIJING(EPSH,1)+W3USTR)) | |
1654 | B4USTI=SQMQ/SQMH*(SQMQ/SQMH-1./4.)*(PYW2AU_HIJING(EPSU,2)- | |
1655 | & PYW2AU_HIJING(EPSH,2)+W3USTI) | |
1656 | A2STUR=A2STUR+B2STUR+B2SUTR | |
1657 | A2STUI=A2STUI+B2STUI+B2SUTI | |
1658 | A2USTR=A2USTR+B2USTR+B2UTSR | |
1659 | A2USTI=A2USTI+B2USTI+B2UTSI | |
1660 | A2TUSR=A2TUSR+B2TUSR+B2TSUR | |
1661 | A2TUSI=A2TUSI+B2TUSI+B2TSUI | |
1662 | A4STUR=A4STUR+B4STUR+B4USTR+B4TUSR | |
1663 | A4STUI=A4STUI+B4STUI+B4USTI+B4TUSI | |
1664 | 760 CONTINUE | |
1665 | FACGH=COMFAC*FACA*3./(128.*PARU(1)**2)*AEM/XW*AS**3* | |
1666 | & SQMH/SQMW*SQMH**3/(SH*TH*UH)*(A2STUR**2+A2STUI**2+A2USTR**2+ | |
1667 | & A2USTI**2+A2TUSR**2+A2TUSI**2+A4STUR**2+A4STUI**2) | |
1668 | FACGH=FACGH*WIDS(25,2) | |
1669 | IF(KFAC(1,21)*KFAC(2,21).EQ.0) GOTO 770 | |
1670 | NCHN=NCHN+1 | |
1671 | ISIG(NCHN,1)=21 | |
1672 | ISIG(NCHN,2)=21 | |
1673 | ISIG(NCHN,3)=1 | |
1674 | SIGH(NCHN)=FACGH | |
1675 | 770 CONTINUE | |
1676 | ||
1677 | ELSEIF(ISUB.EQ.114) THEN | |
1678 | C...g + g -> gamma + gamma. | |
1679 | ASRE=0. | |
1680 | ASIM=0. | |
1681 | DO 780 I=1,2*MSTP(1) | |
1682 | EI=KCHG(IABS(I),1)/3. | |
1683 | SQMQ=PMAS(I,1)**2 | |
1684 | EPSS=4.*SQMQ/SH | |
1685 | EPST=4.*SQMQ/TH | |
1686 | EPSU=4.*SQMQ/UH | |
1687 | IF(EPSS+ABS(EPST)+ABS(EPSU).LT.3.E-6) THEN | |
1688 | A0STUR=1.+(TH-UH)/SH*LOG(TH/UH)+0.5*(TH2+UH2)/SH2* | |
1689 | & (LOG(TH/UH)**2+PARU(1)**2) | |
1690 | A0STUI=0. | |
1691 | A0TSUR=1.+(SH-UH)/TH*LOG(-SH/UH)+0.5*(SH2+UH2)/TH2* | |
1692 | & LOG(-SH/UH)**2 | |
1693 | A0TSUI=-PARU(1)*((SH-UH)/TH+(SH2+UH2)/TH2*LOG(-SH/UH)) | |
1694 | A0UTSR=1.+(TH-SH)/UH*LOG(-TH/SH)+0.5*(TH2+SH2)/UH2* | |
1695 | & LOG(-TH/SH)**2 | |
1696 | A0UTSI=PARU(1)*((TH-SH)/UH+(TH2+SH2)/UH2*LOG(-TH/SH)) | |
1697 | A1STUR=-1. | |
1698 | A1STUI=0. | |
1699 | A2STUR=-1. | |
1700 | A2STUI=0. | |
1701 | ELSE | |
1702 | BESTU=0.5*(1.+SQRT(1.+EPSS*TH/UH)) | |
1703 | BEUST=0.5*(1.+SQRT(1.+EPSU*SH/TH)) | |
1704 | BETUS=0.5*(1.+SQRT(1.+EPST*UH/SH)) | |
1705 | BEUTS=BESTU | |
1706 | BETSU=BEUST | |
1707 | BESUT=BETUS | |
1708 | A0STUR=1.+(1.+2.*TH/SH)*PYW1AU_HIJING(EPST,1)+(1.+2.*UH/SH)* | |
1709 | & PYW1AU_HIJING(EPSU,1)+0.5*((TH2+UH2)/SH2-EPSS) | |
1710 | $ *(PYW2AU_HIJING(EPST,1)+PYW2AU_HIJING(EPSU,1))-0.25*EPST | |
1711 | $ *(1.-0.5*EPSS)*(PYI3AU_HIJING(BESUT,EPSS,1) | |
1712 | $ +PYI3AU_HIJING(BESUT,EPST,1))-0.25*EPSU*(1.-0.5*EPSS) | |
1713 | $ *(PYI3AU_HIJING(BESTU,EPSS,1)+PYI3AU_HIJING(BESTU,EPSU,1) | |
1714 | $ )+0.25*(-2.*(TH2+UH2)/SH2+4.*EPSS+EPST+EPSU+0.5*EPST*EPSU | |
1715 | $ )*(PYI3AU_HIJING(BETSU,EPST,1)+PYI3AU_HIJING(BETSU,EPSU,1 | |
1716 | $ )) | |
1717 | A0STUI=(1.+2.*TH/SH)*PYW1AU_HIJING(EPST,2)+(1.+2.*UH/SH)* | |
1718 | & PYW1AU_HIJING(EPSU,2)+0.5*((TH2+UH2)/SH2-EPSS) | |
1719 | $ *(PYW2AU_HIJING(EPST,2)+PYW2AU_HIJING(EPSU,2))-0.25*EPST | |
1720 | $ *(1.-0.5*EPSS)*(PYI3AU_HIJING(BESUT,EPSS,2) | |
1721 | $ +PYI3AU_HIJING(BESUT,EPST,2))-0.25*EPSU*(1.-0.5*EPSS) | |
1722 | $ *(PYI3AU_HIJING(BESTU,EPSS,2)+PYI3AU_HIJING(BESTU,EPSU,2) | |
1723 | $ )+0.25*(-2.*(TH2+UH2)/SH2+4.*EPSS+EPST+EPSU+0.5*EPST*EPSU | |
1724 | $ )*(PYI3AU_HIJING(BETSU,EPST,2)+PYI3AU_HIJING(BETSU,EPSU,2 | |
1725 | $ )) | |
1726 | A0TSUR=1.+(1.+2.*SH/TH)*PYW1AU_HIJING(EPSS,1)+(1.+2.*UH/TH)* | |
1727 | & PYW1AU_HIJING(EPSU,1)+0.5*((SH2+UH2)/TH2-EPST) | |
1728 | $ *(PYW2AU_HIJING(EPSS,1)+PYW2AU_HIJING(EPSU,1))-0.25*EPSS | |
1729 | $ *(1.-0.5*EPST)*(PYI3AU_HIJING(BETUS,EPST,1) | |
1730 | $ +PYI3AU_HIJING(BETUS,EPSS,1))-0.25*EPSU*(1.-0.5*EPST) | |
1731 | $ *(PYI3AU_HIJING(BETSU,EPST,1)+PYI3AU_HIJING(BETSU,EPSU,1) | |
1732 | $ )+0.25*(-2.*(SH2+UH2)/TH2+4.*EPST+EPSS+EPSU+0.5*EPSS*EPSU | |
1733 | $ )*(PYI3AU_HIJING(BESTU,EPSS,1)+PYI3AU_HIJING(BESTU,EPSU,1 | |
1734 | $ )) | |
1735 | A0TSUI=(1.+2.*SH/TH)*PYW1AU_HIJING(EPSS,2)+(1.+2.*UH/TH)* | |
1736 | & PYW1AU_HIJING(EPSU,2)+0.5*((SH2+UH2)/TH2-EPST) | |
1737 | $ *(PYW2AU_HIJING(EPSS,2)+PYW2AU_HIJING(EPSU,2))-0.25*EPSS | |
1738 | $ *(1.-0.5*EPST)*(PYI3AU_HIJING(BETUS,EPST,2) | |
1739 | $ +PYI3AU_HIJING(BETUS,EPSS,2))-0.25*EPSU*(1.-0.5*EPST) | |
1740 | $ *(PYI3AU_HIJING(BETSU,EPST,2)+PYI3AU_HIJING(BETSU,EPSU,2) | |
1741 | $ )+0.25*(-2.*(SH2+UH2)/TH2+4.*EPST+EPSS+EPSU+0.5*EPSS*EPSU | |
1742 | $ )*(PYI3AU_HIJING(BESTU,EPSS,2)+PYI3AU_HIJING(BESTU,EPSU,2 | |
1743 | $ )) | |
1744 | A0UTSR=1.+(1.+2.*TH/UH)*PYW1AU_HIJING(EPST,1)+(1.+2.*SH/UH)* | |
1745 | & PYW1AU_HIJING(EPSS,1)+0.5*((TH2+SH2)/UH2-EPSU) | |
1746 | $ *(PYW2AU_HIJING(EPST,1)+PYW2AU_HIJING(EPSS,1))-0.25*EPST | |
1747 | $ *(1.-0.5*EPSU)*(PYI3AU_HIJING(BEUST,EPSU,1) | |
1748 | $ +PYI3AU_HIJING(BEUST,EPST,1))-0.25*EPSS*(1.-0.5*EPSU) | |
1749 | $ *(PYI3AU_HIJING(BEUTS,EPSU,1)+PYI3AU_HIJING(BEUTS,EPSS,1) | |
1750 | $ )+0.25*(-2.*(TH2+SH2)/UH2+4.*EPSU+EPST+EPSS+0.5*EPST*EPSS | |
1751 | $ )*(PYI3AU_HIJING(BETUS,EPST,1)+PYI3AU_HIJING(BETUS,EPSS,1 | |
1752 | $ )) | |
1753 | A0UTSI=(1.+2.*TH/UH)*PYW1AU_HIJING(EPST,2)+(1.+2.*SH/UH)* | |
1754 | & PYW1AU_HIJING(EPSS,2)+0.5*((TH2+SH2)/UH2-EPSU) | |
1755 | $ *(PYW2AU_HIJING(EPST,2)+PYW2AU_HIJING(EPSS,2))-0.25*EPST | |
1756 | $ *(1.-0.5*EPSU)*(PYI3AU_HIJING(BEUST,EPSU,2) | |
1757 | $ +PYI3AU_HIJING(BEUST,EPST,2))-0.25*EPSS*(1.-0.5*EPSU) | |
1758 | $ *(PYI3AU_HIJING(BEUTS,EPSU,2)+PYI3AU_HIJING(BEUTS,EPSS,2) | |
1759 | $ )+0.25*(-2.*(TH2+SH2)/UH2+4.*EPSU+EPST+EPSS+0.5*EPST*EPSS | |
1760 | $ )*(PYI3AU_HIJING(BETUS,EPST,2)+PYI3AU_HIJING(BETUS,EPSS,2 | |
1761 | $ )) | |
1762 | A1STUR=-1.-0.25*(EPSS+EPST+EPSU)*(PYW2AU_HIJING(EPSS,1)+ | |
1763 | & PYW2AU_HIJING(EPST,1)+PYW2AU_HIJING(EPSU,1))+0.25*(EPSU+0 | |
1764 | $ .5*EPSS*EPST)*(PYI3AU_HIJING(BESUT,EPSS,1) | |
1765 | $ +PYI3AU_HIJING(BESUT,EPST,1))+0.25*(EPST+0.5*EPSS*EPSU) | |
1766 | $ *(PYI3AU_HIJING(BESTU,EPSS,1)+PYI3AU_HIJING(BESTU,EPSU,1) | |
1767 | $ )+0.25*(EPSS+0.5*EPST*EPSU)*(PYI3AU_HIJING(BETSU,EPST,1) | |
1768 | $ +PYI3AU_HIJING(BETSU,EPSU,1)) | |
1769 | A1STUI=-0.25*(EPSS+EPST+EPSU)*(PYW2AU_HIJING(EPSS,2) | |
1770 | $ +PYW2AU_HIJING(EPST,2)+PYW2AU_HIJING(EPSU,2))+0.25*(EPSU | |
1771 | $ +0.5*EPSS*EPST)*(PYI3AU_HIJING(BESUT,EPSS,2) | |
1772 | $ +PYI3AU_HIJING(BESUT,EPST,2))+0.25*(EPST+0.5*EPSS*EPSU) | |
1773 | $ *(PYI3AU_HIJING(BESTU,EPSS,2)+PYI3AU_HIJING(BESTU,EPSU,2) | |
1774 | $ )+0.25*(EPSS+0.5*EPST*EPSU)*(PYI3AU_HIJING(BETSU,EPST,2) | |
1775 | $ +PYI3AU_HIJING(BETSU,EPSU,2)) | |
1776 | A2STUR=-1.+0.125*EPSS*EPST*(PYI3AU_HIJING(BESUT,EPSS,1)+ | |
1777 | & PYI3AU_HIJING(BESUT,EPST,1))+0.125*EPSS*EPSU | |
1778 | $ *(PYI3AU_HIJING(BESTU,EPSS,1)+PYI3AU_HIJING(BESTU,EPSU,1) | |
1779 | $ )+0.125*EPST*EPSU*(PYI3AU_HIJING(BETSU,EPST,1) | |
1780 | $ +PYI3AU_HIJING(BETSU,EPSU,1)) | |
1781 | A2STUI=0.125*EPSS*EPST*(PYI3AU_HIJING(BESUT,EPSS,2)+ | |
1782 | & PYI3AU_HIJING(BESUT,EPST,2))+0.125*EPSS*EPSU | |
1783 | $ *(PYI3AU_HIJING(BESTU,EPSS,2)+PYI3AU_HIJING(BESTU,EPSU,2) | |
1784 | $ )+0.125*EPST*EPSU*(PYI3AU_HIJING(BETSU,EPST,2) | |
1785 | $ +PYI3AU_HIJING(BETSU,EPSU,2)) | |
1786 | ENDIF | |
1787 | ASRE=ASRE+EI**2*(A0STUR+A0TSUR+A0UTSR+4.*A1STUR+A2STUR) | |
1788 | ASIM=ASIM+EI**2*(A0STUI+A0TSUI+A0UTSI+4.*A1STUI+A2STUI) | |
1789 | 780 CONTINUE | |
1790 | FACGG=COMFAC*FACA/(8.*PARU(1)**2)*AS**2*AEM**2*(ASRE**2+ASIM**2) | |
1791 | IF(KFAC(1,21)*KFAC(2,21).EQ.0) GOTO 790 | |
1792 | NCHN=NCHN+1 | |
1793 | ISIG(NCHN,1)=21 | |
1794 | ISIG(NCHN,2)=21 | |
1795 | ISIG(NCHN,3)=1 | |
1796 | SIGH(NCHN)=FACGG | |
1797 | 790 CONTINUE | |
1798 | ||
1799 | ELSEIF(ISUB.EQ.115) THEN | |
1800 | C...g + g -> gamma + Z0. | |
1801 | ||
1802 | ELSEIF(ISUB.EQ.116) THEN | |
1803 | C...g + g -> Z0 + Z0. | |
1804 | ||
1805 | ELSEIF(ISUB.EQ.117) THEN | |
1806 | C...g + g -> W+ + W-. | |
1807 | ||
1808 | ENDIF | |
1809 | ||
1810 | C...G: 2 -> 3, tree diagrams. | |
1811 | ||
1812 | ELSEIF(ISUB.LE.140) THEN | |
1813 | IF(ISUB.EQ.121) THEN | |
1814 | C...g + g -> f + fb + H0. | |
1815 | ||
1816 | ENDIF | |
1817 | ||
1818 | C...H: 2 -> 1, tree diagrams, non-standard model processes. | |
1819 | ||
1820 | ELSEIF(ISUB.LE.160) THEN | |
1821 | IF(ISUB.EQ.141) THEN | |
1822 | C...f + fb -> gamma*/Z0/Z'0. | |
1823 | MINT(61)=2 | |
1824 | CALL PYWIDT_HIJING(32,SQRT(SH),WDTP,WDTE) | |
1825 | FACZP=COMFAC*AEM**2*4./9. | |
1826 | DO 800 I=MINA,MAXA | |
1827 | IF(I.EQ.0.OR.KFAC(1,I)*KFAC(2,-I).EQ.0) GOTO 800 | |
1828 | EI=KCHG(IABS(I),1)/3. | |
1829 | AI=SIGN(1.,EI) | |
1830 | VI=AI-4.*EI*XW | |
1831 | API=SIGN(1.,EI) | |
1832 | VPI=API-4.*EI*XW | |
1833 | NCHN=NCHN+1 | |
1834 | ISIG(NCHN,1)=I | |
1835 | ISIG(NCHN,2)=-I | |
1836 | ISIG(NCHN,3)=1 | |
1837 | SIGH(NCHN)=FACZP*(EI**2*VINT(111)+EI*VI/(8.*XW*(1.-XW))* | |
1838 | & SH*(SH-SQMZ)/((SH-SQMZ)**2+GMMZ**2)*VINT(112)+EI*VPI/(8.*XW* | |
1839 | & (1.-XW))*SH*(SH-SQMZP)/((SH-SQMZP)**2+GMMZP**2)*VINT(113)+ | |
1840 | & (VI**2+AI**2)/(16.*XW*(1.-XW))**2*SH2/((SH-SQMZ)**2+GMMZ**2)* | |
1841 | & VINT(114)+2.*(VI*VPI+AI*API)/(16.*XW*(1.-XW))**2*SH2* | |
1842 | & ((SH-SQMZ)*(SH-SQMZP)+GMMZ*GMMZP)/(((SH-SQMZ)**2+GMMZ**2)* | |
1843 | & ((SH-SQMZP)**2+GMMZP**2))*VINT(115)+(VPI**2+API**2)/ | |
1844 | & (16.*XW*(1.-XW))**2*SH2/((SH-SQMZP)**2+GMMZP**2)*VINT(116)) | |
1845 | 800 CONTINUE | |
1846 | ||
1847 | ELSEIF(ISUB.EQ.142) THEN | |
1848 | C...f + fb' -> H+/-. | |
1849 | CALL PYWIDT_HIJING(37,SQRT(SH),WDTP,WDTE) | |
1850 | FHC=COMFAC*(AEM/XW)**2*1./48.*(SH/SQMW)**2*SH2/ | |
1851 | & ((SH-SQMHC)**2+GMMHC**2) | |
1852 | C'''No construction yet for leptons | |
1853 | DO 840 I=1,MSTP(54)/2 | |
1854 | IL=2*I-1 | |
1855 | IU=2*I | |
1856 | RMQL=PMAS(IL,1)**2/SH | |
1857 | RMQU=PMAS(IU,1)**2/SH | |
1858 | FACHC=FHC*((RMQL*PARU(121)+RMQU/PARU(121))*(1.-RMQL-RMQU)- | |
1859 | & 4.*RMQL*RMQU)/SQRT(MAX(0.,(1.-RMQL-RMQU)**2-4.*RMQL*RMQU)) | |
1860 | IF(KFAC(1,IL)*KFAC(2,-IU).EQ.0) GOTO 810 | |
1861 | KCHHC=(KCHG(IL,1)-KCHG(IU,1))/3 | |
1862 | NCHN=NCHN+1 | |
1863 | ISIG(NCHN,1)=IL | |
1864 | ISIG(NCHN,2)=-IU | |
1865 | ISIG(NCHN,3)=1 | |
1866 | SIGH(NCHN)=FACHC*(WDTE(0,1)+WDTE(0,(5-KCHHC)/2)+WDTE(0,4)) | |
1867 | 810 IF(KFAC(1,-IL)*KFAC(2,IU).EQ.0) GOTO 820 | |
1868 | KCHHC=(-KCHG(IL,1)+KCHG(IU,1))/3 | |
1869 | NCHN=NCHN+1 | |
1870 | ISIG(NCHN,1)=-IL | |
1871 | ISIG(NCHN,2)=IU | |
1872 | ISIG(NCHN,3)=1 | |
1873 | SIGH(NCHN)=FACHC*(WDTE(0,1)+WDTE(0,(5-KCHHC)/2)+WDTE(0,4)) | |
1874 | 820 IF(KFAC(1,IU)*KFAC(2,-IL).EQ.0) GOTO 830 | |
1875 | KCHHC=(KCHG(IU,1)-KCHG(IL,1))/3 | |
1876 | NCHN=NCHN+1 | |
1877 | ISIG(NCHN,1)=IU | |
1878 | ISIG(NCHN,2)=-IL | |
1879 | ISIG(NCHN,3)=1 | |
1880 | SIGH(NCHN)=FACHC*(WDTE(0,1)+WDTE(0,(5-KCHHC)/2)+WDTE(0,4)) | |
1881 | 830 IF(KFAC(1,-IU)*KFAC(2,IL).EQ.0) GOTO 840 | |
1882 | KCHHC=(-KCHG(IU,1)+KCHG(IL,1))/3 | |
1883 | NCHN=NCHN+1 | |
1884 | ISIG(NCHN,1)=-IU | |
1885 | ISIG(NCHN,2)=IL | |
1886 | ISIG(NCHN,3)=1 | |
1887 | SIGH(NCHN)=FACHC*(WDTE(0,1)+WDTE(0,(5-KCHHC)/2)+WDTE(0,4)) | |
1888 | 840 CONTINUE | |
1889 | ||
1890 | ELSEIF(ISUB.EQ.143) THEN | |
1891 | C...f + fb -> R. | |
1892 | CALL PYWIDT_HIJING(40,SQRT(SH),WDTP,WDTE) | |
1893 | FACR=COMFAC*(AEM/XW)**2*1./9.*SH2/((SH-SQMR)**2+GMMR**2) | |
1894 | DO 860 I=MIN1,MAX1 | |
1895 | IF(I.EQ.0.OR.KFAC(1,I).EQ.0) GOTO 860 | |
1896 | IA=IABS(I) | |
1897 | DO 850 J=MIN2,MAX2 | |
1898 | IF(J.EQ.0.OR.KFAC(2,J).EQ.0) GOTO 850 | |
1899 | JA=IABS(J) | |
1900 | IF(I*J.GT.0.OR.IABS(IA-JA).NE.2) GOTO 850 | |
1901 | NCHN=NCHN+1 | |
1902 | ISIG(NCHN,1)=I | |
1903 | ISIG(NCHN,2)=J | |
1904 | ISIG(NCHN,3)=1 | |
1905 | SIGH(NCHN)=FACR*(WDTE(0,1)+WDTE(0,(10-(I+J))/4)+WDTE(0,4)) | |
1906 | 850 CONTINUE | |
1907 | 860 CONTINUE | |
1908 | ||
1909 | ENDIF | |
1910 | ||
1911 | C...I: 2 -> 2, tree diagrams, non-standard model processes. | |
1912 | ||
1913 | ELSE | |
1914 | IF(ISUB.EQ.161) THEN | |
1915 | C...f + g -> f' + H+/- (q + g -> q' + H+/- only). | |
1916 | FHCQ=COMFAC*FACA*AS*AEM/XW*1./24 | |
1917 | DO 900 I=1,MSTP(54) | |
1918 | IU=I+MOD(I,2) | |
1919 | SQMQ=PMAS(IU,1)**2 | |
1920 | FACHCQ=FHCQ/PARU(121)*SQMQ/SQMW*(SH/(SQMQ-UH)+ | |
1921 | & 2.*SQMQ*(SQMHC-UH)/(SQMQ-UH)**2+(SQMQ-UH)/SH+ | |
1922 | & 2.*SQMQ/(SQMQ-UH)+2.*(SQMHC-UH)/(SQMQ-UH)*(SQMHC-SQMQ-SH)/SH) | |
1923 | IF(KFAC(1,-I)*KFAC(2,21).EQ.0) GOTO 870 | |
1924 | KCHHC=ISIGN(1,-KCHG(I,1)) | |
1925 | NCHN=NCHN+1 | |
1926 | ISIG(NCHN,1)=-I | |
1927 | ISIG(NCHN,2)=21 | |
1928 | ISIG(NCHN,3)=1 | |
1929 | SIGH(NCHN)=FACHCQ*(WDTE(0,1)+WDTE(0,(5-KCHHC)/2)+WDTE(0,4)) | |
1930 | 870 IF(KFAC(1,I)*KFAC(2,21).EQ.0) GOTO 880 | |
1931 | KCHHC=ISIGN(1,KCHG(I,1)) | |
1932 | NCHN=NCHN+1 | |
1933 | ISIG(NCHN,1)=I | |
1934 | ISIG(NCHN,2)=21 | |
1935 | ISIG(NCHN,3)=1 | |
1936 | SIGH(NCHN)=FACHCQ*(WDTE(0,1)+WDTE(0,(5-KCHHC)/2)+WDTE(0,4)) | |
1937 | 880 IF(KFAC(1,21)*KFAC(2,-I).EQ.0) GOTO 890 | |
1938 | KCHHC=ISIGN(1,-KCHG(I,1)) | |
1939 | NCHN=NCHN+1 | |
1940 | ISIG(NCHN,1)=21 | |
1941 | ISIG(NCHN,2)=-I | |
1942 | ISIG(NCHN,3)=1 | |
1943 | SIGH(NCHN)=FACHCQ*(WDTE(0,1)+WDTE(0,(5-KCHHC)/2)+WDTE(0,4)) | |
1944 | 890 IF(KFAC(1,21)*KFAC(2,I).EQ.0) GOTO 900 | |
1945 | KCHHC=ISIGN(1,KCHG(I,1)) | |
1946 | NCHN=NCHN+1 | |
1947 | ISIG(NCHN,1)=21 | |
1948 | ISIG(NCHN,2)=I | |
1949 | ISIG(NCHN,3)=1 | |
1950 | SIGH(NCHN)=FACHCQ*(WDTE(0,1)+WDTE(0,(5-KCHHC)/2)+WDTE(0,4)) | |
1951 | 900 CONTINUE | |
1952 | ||
1953 | ENDIF | |
1954 | ENDIF | |
1955 | ||
1956 | C...Multiply with structure functions. | |
1957 | IF(ISUB.LE.90.OR.ISUB.GE.96) THEN | |
1958 | DO 910 ICHN=1,NCHN | |
1959 | IF(MINT(41).EQ.2) THEN | |
1960 | KFL1=ISIG(ICHN,1) | |
1961 | IF(KFL1.EQ.21) KFL1=0 | |
1962 | SIGH(ICHN)=SIGH(ICHN)*XSFX(1,KFL1) | |
1963 | ENDIF | |
1964 | IF(MINT(42).EQ.2) THEN | |
1965 | KFL2=ISIG(ICHN,2) | |
1966 | IF(KFL2.EQ.21) KFL2=0 | |
1967 | SIGH(ICHN)=SIGH(ICHN)*XSFX(2,KFL2) | |
1968 | ENDIF | |
1969 | 910 SIGS=SIGS+SIGH(ICHN) | |
1970 | ENDIF | |
1971 | ||
1972 | RETURN | |
1973 | END |