--- /dev/null
+* $Id$
+
+C*********************************************************************
+
+ SUBROUTINE PYWIDT_HIJING(KFLR,RMAS,WDTP,WDTE)
+
+C...Calculates full and partial widths of resonances.
+#include "ludat1_hijing.inc"
+#include "ludat2_hijing.inc"
+#include "ludat3_hijing.inc"
+#include "pypars_hijing.inc"
+#include "pyint1_hijing.inc"
+#include "pyint4_hijing.inc"
+ DIMENSION WDTP(0:40),WDTE(0:40,0:5)
+
+C...Some common constants.
+ KFLA=IABS(KFLR)
+ SQM=RMAS**2
+ AS=ULALPS_HIJING(SQM)
+ AEM=PARU(101)
+ XW=PARU(102)
+ RADC=1.+AS/PARU(1)
+
+C...Reset width information.
+ DO 100 I=0,40
+ WDTP(I)=0.
+ DO 100 J=0,5
+ 100 WDTE(I,J)=0.
+
+ IF(KFLA.EQ.21) THEN
+C...QCD:
+ DO 110 I=1,MDCY(21,3)
+ IDC=I+MDCY(21,2)-1
+ RM1=(PMAS(IABS(KFDP(IDC,1)),1)/RMAS)**2
+ RM2=(PMAS(IABS(KFDP(IDC,2)),1)/RMAS)**2
+ IF(SQRT(RM1)+SQRT(RM2).GT.1..OR.MDME(IDC,1).LT.0) GOTO 110
+ IF(I.LE.8) THEN
+C...QCD -> q + qb
+ WDTP(I)=(1.+2.*RM1)*SQRT(MAX(0.,1.-4.*RM1))
+ WID2=1.
+ ENDIF
+ WDTP(0)=WDTP(0)+WDTP(I)
+ IF(MDME(IDC,1).GT.0) THEN
+ WDTE(I,MDME(IDC,1))=WDTP(I)*WID2
+ WDTE(0,MDME(IDC,1))=WDTE(0,MDME(IDC,1))+WDTE(I,MDME(IDC,1))
+ WDTE(I,0)=WDTE(I,MDME(IDC,1))
+ WDTE(0,0)=WDTE(0,0)+WDTE(I,0)
+ ENDIF
+ 110 CONTINUE
+
+ ELSEIF(KFLA.EQ.23) THEN
+C...Z0:
+ IF(MINT(61).EQ.1) THEN
+ EI=KCHG(IABS(MINT(15)),1)/3.
+ AI=SIGN(1.,EI)
+ VI=AI-4.*EI*XW
+ SQMZ=PMAS(23,1)**2
+ GZMZ=PMAS(23,2)*PMAS(23,1)
+ GGI=EI**2
+ GZI=EI*VI/(8.*XW*(1.-XW))*SQM*(SQM-SQMZ)/
+ & ((SQM-SQMZ)**2+GZMZ**2)
+ ZZI=(VI**2+AI**2)/(16.*XW*(1.-XW))**2*SQM**2/
+ & ((SQM-SQMZ)**2+GZMZ**2)
+ IF(MSTP(43).EQ.1) THEN
+C...Only gamma* production included
+ GZI=0.
+ ZZI=0.
+ ELSEIF(MSTP(43).EQ.2) THEN
+C...Only Z0 production included
+ GGI=0.
+ GZI=0.
+ ENDIF
+ ELSEIF(MINT(61).EQ.2) THEN
+ VINT(111)=0.
+ VINT(112)=0.
+ VINT(114)=0.
+ ENDIF
+ DO 120 I=1,MDCY(23,3)
+ IDC=I+MDCY(23,2)-1
+ RM1=(PMAS(IABS(KFDP(IDC,1)),1)/RMAS)**2
+ RM2=(PMAS(IABS(KFDP(IDC,2)),1)/RMAS)**2
+ IF(SQRT(RM1)+SQRT(RM2).GT.1..OR.MDME(IDC,1).LT.0) GOTO 120
+ IF(I.LE.8) THEN
+C...Z0 -> q + qb
+ EF=KCHG(I,1)/3.
+ AF=SIGN(1.,EF+0.1)
+ VF=AF-4.*EF*XW
+ IF(MINT(61).EQ.0) THEN
+ WDTP(I)=3.*(VF**2*(1.+2.*RM1)+AF**2*(1.-4.*RM1))*
+ & SQRT(MAX(0.,1.-4.*RM1))*RADC
+ ELSEIF(MINT(61).EQ.1) THEN
+ WDTP(I)=3.*((GGI*EF**2+GZI*EF*VF+ZZI*VF**2)*
+ & (1.+2.*RM1)+ZZI*AF**2*(1.-4.*RM1))*
+ & SQRT(MAX(0.,1.-4.*RM1))*RADC
+ ELSEIF(MINT(61).EQ.2) THEN
+ GGF=3.*EF**2*(1.+2.*RM1)*SQRT(MAX(0.,1.-4.*RM1))*RADC
+ GZF=3.*EF*VF*(1.+2.*RM1)*SQRT(MAX(0.,1.-4.*RM1))*RADC
+ ZZF=3.*(VF**2*(1.+2.*RM1)+AF**2*(1.-4.*RM1))*
+ & SQRT(MAX(0.,1.-4.*RM1))*RADC
+ ENDIF
+ WID2=1.
+ ELSEIF(I.LE.16) THEN
+C...Z0 -> l+ + l-, nu + nub
+ EF=KCHG(I+2,1)/3.
+ AF=SIGN(1.,EF+0.1)
+ VF=AF-4.*EF*XW
+ WDTP(I)=(VF**2*(1.+2.*RM1)+AF**2*(1.-4.*RM1))*
+ & SQRT(MAX(0.,1.-4.*RM1))
+ IF(MINT(61).EQ.0) THEN
+ WDTP(I)=(VF**2*(1.+2.*RM1)+AF**2*(1.-4.*RM1))*
+ & SQRT(MAX(0.,1.-4.*RM1))
+ ELSEIF(MINT(61).EQ.1) THEN
+ WDTP(I)=((GGI*EF**2+GZI*EF*VF+ZZI*VF**2)*
+ & (1.+2.*RM1)+ZZI*AF**2*(1.-4.*RM1))*
+ & SQRT(MAX(0.,1.-4.*RM1))
+ ELSEIF(MINT(61).EQ.2) THEN
+ GGF=EF**2*(1.+2.*RM1)*SQRT(MAX(0.,1.-4.*RM1))
+ GZF=EF*VF*(1.+2.*RM1)*SQRT(MAX(0.,1.-4.*RM1))
+ ZZF=(VF**2*(1.+2.*RM1)+AF**2*(1.-4.*RM1))*
+ & SQRT(MAX(0.,1.-4.*RM1))
+ ENDIF
+ WID2=1.
+ ELSE
+C...Z0 -> H+ + H-
+ CF=2.*(1.-2.*XW)
+ IF(MINT(61).EQ.0) THEN
+ WDTP(I)=0.25*CF**2*(1.-4.*RM1)*SQRT(MAX(0.,1.-4.*RM1))
+ ELSEIF(MINT(61).EQ.1) THEN
+ WDTP(I)=0.25*(GGI+GZI*CF+ZZI*CF**2)*(1.-4.*RM1)*
+ & SQRT(MAX(0.,1.-4.*RM1))
+ ELSEIF(MINT(61).EQ.2) THEN
+ GGF=0.25*(1.-4.*RM1)*SQRT(MAX(0.,1.-4.*RM1))
+ GZF=0.25*CF*(1.-4.*RM1)*SQRT(MAX(0.,1.-4.*RM1))
+ ZZF=0.25*CF**2*(1.-4.*RM1)*SQRT(MAX(0.,1.-4.*RM1))
+ ENDIF
+ WID2=WIDS(37,1)
+ ENDIF
+ WDTP(0)=WDTP(0)+WDTP(I)
+ IF(MDME(IDC,1).GT.0) THEN
+ WDTE(I,MDME(IDC,1))=WDTP(I)*WID2
+ WDTE(0,MDME(IDC,1))=WDTE(0,MDME(IDC,1))+WDTE(I,MDME(IDC,1))
+ WDTE(I,0)=WDTE(I,MDME(IDC,1))
+ WDTE(0,0)=WDTE(0,0)+WDTE(I,0)
+ VINT(111)=VINT(111)+GGF*WID2
+ VINT(112)=VINT(112)+GZF*WID2
+ VINT(114)=VINT(114)+ZZF*WID2
+ ENDIF
+ 120 CONTINUE
+ IF(MSTP(43).EQ.1) THEN
+C...Only gamma* production included
+ VINT(112)=0.
+ VINT(114)=0.
+ ELSEIF(MSTP(43).EQ.2) THEN
+C...Only Z0 production included
+ VINT(111)=0.
+ VINT(112)=0.
+ ENDIF
+
+ ELSEIF(KFLA.EQ.24) THEN
+C...W+/-:
+ DO 130 I=1,MDCY(24,3)
+ IDC=I+MDCY(24,2)-1
+ RM1=(PMAS(IABS(KFDP(IDC,1)),1)/RMAS)**2
+ RM2=(PMAS(IABS(KFDP(IDC,2)),1)/RMAS)**2
+ IF(SQRT(RM1)+SQRT(RM2).GT.1..OR.MDME(IDC,1).LT.0) GOTO 130
+ IF(I.LE.16) THEN
+C...W+/- -> q + qb'
+ WDTP(I)=3.*(2.-RM1-RM2-(RM1-RM2)**2)*
+ & SQRT(MAX(0.,(1.-RM1-RM2)**2-4.*RM1*RM2))*
+ & VCKM((I-1)/4+1,MOD(I-1,4)+1)*RADC
+ WID2=1.
+ ELSE
+C...W+/- -> l+/- + nu
+ WDTP(I)=(2.-RM1-RM2-(RM1-RM2)**2)*
+ & SQRT(MAX(0.,(1.-RM1-RM2)**2-4.*RM1*RM2))
+ WID2=1.
+ ENDIF
+ WDTP(0)=WDTP(0)+WDTP(I)
+ IF(MDME(IDC,1).GT.0) THEN
+ WDTE(I,MDME(IDC,1))=WDTP(I)*WID2
+ WDTE(0,MDME(IDC,1))=WDTE(0,MDME(IDC,1))+WDTE(I,MDME(IDC,1))
+ WDTE(I,0)=WDTE(I,MDME(IDC,1))
+ WDTE(0,0)=WDTE(0,0)+WDTE(I,0)
+ ENDIF
+ 130 CONTINUE
+
+ ELSEIF(KFLA.EQ.25) THEN
+C...H0:
+ DO 170 I=1,MDCY(25,3)
+ IDC=I+MDCY(25,2)-1
+ RM1=(PMAS(IABS(KFDP(IDC,1)),1)/RMAS)**2
+ RM2=(PMAS(IABS(KFDP(IDC,2)),1)/RMAS)**2
+ IF(SQRT(RM1)+SQRT(RM2).GT.1..OR.MDME(IDC,1).LT.0) GOTO 170
+ IF(I.LE.8) THEN
+C...H0 -> q + qb
+ WDTP(I)=3.*RM1*(1.-4.*RM1)*SQRT(MAX(0.,1.-4.*RM1))*RADC
+ WID2=1.
+ ELSEIF(I.LE.12) THEN
+C...H0 -> l+ + l-
+ WDTP(I)=RM1*(1.-4.*RM1)*SQRT(MAX(0.,1.-4.*RM1))
+ WID2=1.
+ ELSEIF(I.EQ.13) THEN
+C...H0 -> g + g; quark loop contribution only
+ ETARE=0.
+ ETAIM=0.
+ DO 140 J=1,2*MSTP(1)
+ EPS=(2.*PMAS(J,1)/RMAS)**2
+ IF(EPS.LE.1.) THEN
+ IF(EPS.GT.1.E-4) THEN
+ ROOT=SQRT(1.-EPS)
+ RLN=LOG((1.+ROOT)/(1.-ROOT))
+ ELSE
+ RLN=LOG(4./EPS-2.)
+ ENDIF
+ PHIRE=0.25*(RLN**2-PARU(1)**2)
+ PHIIM=0.5*PARU(1)*RLN
+ ELSE
+ PHIRE=-(ASIN(1./SQRT(EPS)))**2
+ PHIIM=0.
+ ENDIF
+ ETARE=ETARE+0.5*EPS*(1.+(EPS-1.)*PHIRE)
+ ETAIM=ETAIM+0.5*EPS*(EPS-1.)*PHIIM
+ 140 CONTINUE
+ ETA2=ETARE**2+ETAIM**2
+ WDTP(I)=(AS/PARU(1))**2*ETA2
+ WID2=1.
+ ELSEIF(I.EQ.14) THEN
+C...H0 -> gamma + gamma; quark, charged lepton and W loop contributions
+ ETARE=0.
+ ETAIM=0.
+ DO 150 J=1,3*MSTP(1)+1
+ IF(J.LE.2*MSTP(1)) THEN
+ EJ=KCHG(J,1)/3.
+ EPS=(2.*PMAS(J,1)/RMAS)**2
+ ELSEIF(J.LE.3*MSTP(1)) THEN
+ JL=2*(J-2*MSTP(1))-1
+ EJ=KCHG(10+JL,1)/3.
+ EPS=(2.*PMAS(10+JL,1)/RMAS)**2
+ ELSE
+ EPS=(2.*PMAS(24,1)/RMAS)**2
+ ENDIF
+ IF(EPS.LE.1.) THEN
+ IF(EPS.GT.1.E-4) THEN
+ ROOT=SQRT(1.-EPS)
+ RLN=LOG((1.+ROOT)/(1.-ROOT))
+ ELSE
+ RLN=LOG(4./EPS-2.)
+ ENDIF
+ PHIRE=0.25*(RLN**2-PARU(1)**2)
+ PHIIM=0.5*PARU(1)*RLN
+ ELSE
+ PHIRE=-(ASIN(1./SQRT(EPS)))**2
+ PHIIM=0.
+ ENDIF
+ IF(J.LE.2*MSTP(1)) THEN
+ ETARE=ETARE+0.5*3.*EJ**2*EPS*(1.+(EPS-1.)*PHIRE)
+ ETAIM=ETAIM+0.5*3.*EJ**2*EPS*(EPS-1.)*PHIIM
+ ELSEIF(J.LE.3*MSTP(1)) THEN
+ ETARE=ETARE+0.5*EJ**2*EPS*(1.+(EPS-1.)*PHIRE)
+ ETAIM=ETAIM+0.5*EJ**2*EPS*(EPS-1.)*PHIIM
+ ELSE
+ ETARE=ETARE-0.5-0.75*EPS*(1.+(EPS-2.)*PHIRE)
+ ETAIM=ETAIM+0.75*EPS*(EPS-2.)*PHIIM
+ ENDIF
+ 150 CONTINUE
+ ETA2=ETARE**2+ETAIM**2
+ WDTP(I)=(AEM/PARU(1))**2*0.5*ETA2
+ WID2=1.
+ ELSEIF(I.EQ.15) THEN
+C...H0 -> gamma + Z0; quark, charged lepton and W loop contributions
+ ETARE=0.
+ ETAIM=0.
+ DO 160 J=1,3*MSTP(1)+1
+ IF(J.LE.2*MSTP(1)) THEN
+ EJ=KCHG(J,1)/3.
+ AJ=SIGN(1.,EJ+0.1)
+ VJ=AJ-4.*EJ*XW
+ EPS=(2.*PMAS(J,1)/RMAS)**2
+ EPSP=(2.*PMAS(J,1)/PMAS(23,1))**2
+ ELSEIF(J.LE.3*MSTP(1)) THEN
+ JL=2*(J-2*MSTP(1))-1
+ EJ=KCHG(10+JL,1)/3.
+ AJ=SIGN(1.,EJ+0.1)
+ VJ=AI-4.*EJ*XW
+ EPS=(2.*PMAS(10+JL,1)/RMAS)**2
+ EPSP=(2.*PMAS(10+JL,1)/PMAS(23,1))**2
+ ELSE
+ EPS=(2.*PMAS(24,1)/RMAS)**2
+ EPSP=(2.*PMAS(24,1)/PMAS(23,1))**2
+ ENDIF
+ IF(EPS.LE.1.) THEN
+ ROOT=SQRT(1.-EPS)
+ IF(EPS.GT.1.E-4) THEN
+ RLN=LOG((1.+ROOT)/(1.-ROOT))
+ ELSE
+ RLN=LOG(4./EPS-2.)
+ ENDIF
+ PHIRE=0.25*(RLN**2-PARU(1)**2)
+ PHIIM=0.5*PARU(1)*RLN
+ PSIRE=-(1.+0.5*ROOT*RLN)
+ PSIIM=0.5*PARU(1)*ROOT
+ ELSE
+ PHIRE=-(ASIN(1./SQRT(EPS)))**2
+ PHIIM=0.
+ PSIRE=-(1.+SQRT(EPS-1.)*ASIN(1./SQRT(EPS)))
+ PSIIM=0.
+ ENDIF
+ IF(EPSP.LE.1.) THEN
+ ROOT=SQRT(1.-EPSP)
+ IF(EPSP.GT.1.E-4) THEN
+ RLN=LOG((1.+ROOT)/(1.-ROOT))
+ ELSE
+ RLN=LOG(4./EPSP-2.)
+ ENDIF
+ PHIREP=0.25*(RLN**2-PARU(1)**2)
+ PHIIMP=0.5*PARU(1)*RLN
+ PSIREP=-(1.+0.5*ROOT*RLN)
+ PSIIMP=0.5*PARU(1)*ROOT
+ ELSE
+ PHIREP=-(ASIN(1./SQRT(EPSP)))**2
+ PHIIMP=0.
+ PSIREP=-(1.+SQRT(EPSP-1.)*ASIN(1./SQRT(EPSP)))
+ PSIIMP=0.
+ ENDIF
+ FXYRE=EPS*EPSP/(8.*(EPS-EPSP))*(1.-EPS*EPSP/(EPS-EPSP)*(PHIRE-
+ & PHIREP)+2.*EPS/(EPS-EPSP)*(PSIRE-PSIREP))
+ FXYIM=EPS*EPSP/(8.*(EPS-EPSP))*(-EPS*EPSP/(EPS-EPSP)*(PHIIM-
+ & PHIIMP)+2.*EPS/(EPS-EPSP)*(PSIIM-PSIIMP))
+ F1RE=EPS*EPSP/(2.*(EPS-EPSP))*(PHIRE-PHIREP)
+ F1IM=EPS*EPSP/(2.*(EPS-EPSP))*(PHIIM-PHIIMP)
+ IF(J.LE.2*MSTP(1)) THEN
+ ETARE=ETARE-3.*EJ*VJ*(FXYRE-0.25*F1RE)
+ ETAIM=ETAIM-3.*EJ*VJ*(FXYIM-0.25*F1IM)
+ ELSEIF(J.LE.3*MSTP(1)) THEN
+ ETARE=ETARE-EJ*VJ*(FXYRE-0.25*F1RE)
+ ETAIM=ETAIM-EJ*VJ*(FXYIM-0.25*F1IM)
+ ELSE
+ ETARE=ETARE-SQRT(1.-XW)*(((1.+2./EPS)*XW/SQRT(1.-XW)-
+ & (5.+2./EPS))*FXYRE+(3.-XW/SQRT(1.-XW))*F1RE)
+ ETAIM=ETAIM-SQRT(1.-XW)*(((1.+2./EPS)*XW/SQRT(1.-XW)-
+ & (5.+2./EPS))*FXYIM+(3.-XW/SQRT(1.-XW))*F1IM)
+ ENDIF
+ 160 CONTINUE
+ ETA2=ETARE**2+ETAIM**2
+ WDTP(I)=(AEM/PARU(1))**2*(1.-(PMAS(23,1)/RMAS)**2)**3/XW*ETA2
+ WID2=WIDS(23,2)
+ ELSE
+C...H0 -> Z0 + Z0, W+ + W-
+ WDTP(I)=(1.-4.*RM1+12.*RM1**2)*SQRT(MAX(0.,1.-4.*RM1))/
+ & (2.*(18-I))
+ WID2=WIDS(7+I,1)
+ ENDIF
+ WDTP(0)=WDTP(0)+WDTP(I)
+ IF(MDME(IDC,1).GT.0) THEN
+ WDTE(I,MDME(IDC,1))=WDTP(I)*WID2
+ WDTE(0,MDME(IDC,1))=WDTE(0,MDME(IDC,1))+WDTE(I,MDME(IDC,1))
+ WDTE(I,0)=WDTE(I,MDME(IDC,1))
+ WDTE(0,0)=WDTE(0,0)+WDTE(I,0)
+ ENDIF
+ 170 CONTINUE
+
+ ELSEIF(KFLA.EQ.32) THEN
+C...Z'0:
+ IF(MINT(61).EQ.1) THEN
+ EI=KCHG(IABS(MINT(15)),1)/3.
+ AI=SIGN(1.,EI)
+ VI=AI-4.*EI*XW
+ SQMZ=PMAS(23,1)**2
+ GZMZ=PMAS(23,2)*PMAS(23,1)
+ API=SIGN(1.,EI)
+ VPI=API-4.*EI*XW
+ SQMZP=PMAS(32,1)**2
+ GZPMZP=PMAS(32,2)*PMAS(32,1)
+ GGI=EI**2
+ GZI=EI*VI/(8.*XW*(1.-XW))*SQM*(SQM-SQMZ)/
+ & ((SQM-SQMZ)**2+GZMZ**2)
+ GZPI=EI*VPI/(8.*XW*(1.-XW))*SQM*(SQM-SQMZP)/
+ & ((SQM-SQMZP)**2+GZPMZP**2)
+ ZZI=(VI**2+AI**2)/(16.*XW*(1.-XW))**2*SQM**2/
+ & ((SQM-SQMZ)**2+GZMZ**2)
+ ZZPI=2.*(VI*VPI+AI*API)/(16.*XW*(1.-XW))**2*
+ & SQM**2*((SQM-SQMZ)*(SQM-SQMZP)+GZMZ*GZPMZP)/
+ & (((SQM-SQMZ)**2+GZMZ**2)*((SQM-SQMZP)**2+GZPMZP**2))
+ ZPZPI=(VPI**2+API**2)/(16.*XW*(1.-XW))**2*SQM**2/
+ & ((SQM-SQMZP)**2+GZPMZP**2)
+ IF(MSTP(44).EQ.1) THEN
+C...Only gamma* production included
+ GZI=0.
+ GZPI=0.
+ ZZI=0.
+ ZZPI=0.
+ ZPZPI=0.
+ ELSEIF(MSTP(44).EQ.2) THEN
+C...Only Z0 production included
+ GGI=0.
+ GZI=0.
+ GZPI=0.
+ ZZPI=0.
+ ZPZPI=0.
+ ELSEIF(MSTP(44).EQ.3) THEN
+C...Only Z'0 production included
+ GGI=0.
+ GZI=0.
+ GZPI=0.
+ ZZI=0.
+ ZZPI=0.
+ ELSEIF(MSTP(44).EQ.4) THEN
+C...Only gamma*/Z0 production included
+ GZPI=0.
+ ZZPI=0.
+ ZPZPI=0.
+ ELSEIF(MSTP(44).EQ.5) THEN
+C...Only gamma*/Z'0 production included
+ GZI=0.
+ ZZI=0.
+ ZZPI=0.
+ ELSEIF(MSTP(44).EQ.6) THEN
+C...Only Z0/Z'0 production included
+ GGI=0.
+ GZI=0.
+ GZPI=0.
+ ENDIF
+ ELSEIF(MINT(61).EQ.2) THEN
+ VINT(111)=0.
+ VINT(112)=0.
+ VINT(113)=0.
+ VINT(114)=0.
+ VINT(115)=0.
+ VINT(116)=0.
+ ENDIF
+ DO 180 I=1,MDCY(32,3)
+ IDC=I+MDCY(32,2)-1
+ RM1=(PMAS(IABS(KFDP(IDC,1)),1)/RMAS)**2
+ RM2=(PMAS(IABS(KFDP(IDC,2)),1)/RMAS)**2
+ IF(SQRT(RM1)+SQRT(RM2).GT.1..OR.MDME(IDC,1).LT.0) GOTO 180
+ IF(I.LE.8) THEN
+C...Z'0 -> q + qb
+ EF=KCHG(I,1)/3.
+ AF=SIGN(1.,EF+0.1)
+ VF=AF-4.*EF*XW
+ APF=SIGN(1.,EF+0.1)
+ VPF=APF-4.*EF*XW
+ IF(MINT(61).EQ.0) THEN
+ WDTP(I)=3.*(VPF**2*(1.+2.*RM1)+APF**2*(1.-4.*RM1))*
+ & SQRT(MAX(0.,1.-4.*RM1))*RADC
+ ELSEIF(MINT(61).EQ.1) THEN
+ WDTP(I)=3.*((GGI*EF**2+GZI*EF*VF+GZPI*EF*VPF+ZZI*VF**2+
+ & ZZPI*VF*VPF+ZPZPI*VPF**2)*(1.+2.*RM1)+(ZZI*AF**2+
+ & ZZPI*AF*APF+ZPZPI*APF**2)*(1.-4.*RM1))*
+ & SQRT(MAX(0.,1.-4.*RM1))*RADC
+ ELSEIF(MINT(61).EQ.2) THEN
+ GGF=3.*EF**2*(1.+2.*RM1)*SQRT(MAX(0.,1.-4.*RM1))*RADC
+ GZF=3.*EF*VF*(1.+2.*RM1)*SQRT(MAX(0.,1.-4.*RM1))*RADC
+ GZPF=3.*EF*VPF*(1.+2.*RM1)*SQRT(MAX(0.,1.-4.*RM1))*RADC
+ ZZF=3.*(VF**2*(1.+2.*RM1)+AF**2*(1.-4.*RM1))*
+ & SQRT(MAX(0.,1.-4.*RM1))*RADC
+ ZZPF=3.*(VF*VPF*(1.+2.*RM1)+AF*APF*(1.-4.*RM1))*
+ & SQRT(MAX(0.,1.-4.*RM1))*RADC
+ ZPZPF=3.*(VPF**2*(1.+2.*RM1)+APF**2*(1.-4.*RM1))*
+ & SQRT(MAX(0.,1.-4.*RM1))*RADC
+ ENDIF
+ WID2=1.
+ ELSE
+C...Z'0 -> l+ + l-, nu + nub
+ EF=KCHG(I+2,1)/3.
+ AF=SIGN(1.,EF+0.1)
+ VF=AF-4.*EF*XW
+ APF=SIGN(1.,EF+0.1)
+ VPF=API-4.*EF*XW
+ IF(MINT(61).EQ.0) THEN
+ WDTP(I)=(VPF**2*(1.+2.*RM1)+APF**2*(1.-4.*RM1))*
+ & SQRT(MAX(0.,1.-4.*RM1))
+ ELSEIF(MINT(61).EQ.1) THEN
+ WDTP(I)=((GGI*EF**2+GZI*EF*VF+GZPI*EF*VPF+ZZI*VF**2+
+ & ZZPI*VF*VPF+ZPZPI*VPF**2)*(1.+2.*RM1)+(ZZI*AF**2+
+ & ZZPI*AF*APF+ZPZPI*APF**2)*(1.-4.*RM1))*
+ & SQRT(MAX(0.,1.-4.*RM1))
+ ELSEIF(MINT(61).EQ.2) THEN
+ GGF=EF**2*(1.+2.*RM1)*SQRT(MAX(0.,1.-4.*RM1))
+ GZF=EF*VF*(1.+2.*RM1)*SQRT(MAX(0.,1.-4.*RM1))
+ GZPF=EF*VPF*(1.+2.*RM1)*SQRT(MAX(0.,1.-4.*RM1))
+ ZZF=(VF**2*(1.+2.*RM1)+AF**2*(1.-4.*RM1))*
+ & SQRT(MAX(0.,1.-4.*RM1))
+ ZZPF=(VF*VPF*(1.+2.*RM1)+AF*APF*(1.-4.*RM1))*
+ & SQRT(MAX(0.,1.-4.*RM1))
+ ZPZPF=(VPF**2*(1.+2.*RM1)+APF**2*(1.-4.*RM1))*
+ & SQRT(MAX(0.,1.-4.*RM1))
+ ENDIF
+ WID2=1.
+ ENDIF
+ WDTP(0)=WDTP(0)+WDTP(I)
+ IF(MDME(IDC,1).GT.0) THEN
+ WDTE(I,MDME(IDC,1))=WDTP(I)*WID2
+ WDTE(0,MDME(IDC,1))=WDTE(0,MDME(IDC,1))+WDTE(I,MDME(IDC,1))
+ WDTE(I,0)=WDTE(I,MDME(IDC,1))
+ WDTE(0,0)=WDTE(0,0)+WDTE(I,0)
+ VINT(111)=VINT(111)+GGF
+ VINT(112)=VINT(112)+GZF
+ VINT(113)=VINT(113)+GZPF
+ VINT(114)=VINT(114)+ZZF
+ VINT(115)=VINT(115)+ZZPF
+ VINT(116)=VINT(116)+ZPZPF
+ ENDIF
+ 180 CONTINUE
+ IF(MSTP(44).EQ.1) THEN
+C...Only gamma* production included
+ VINT(112)=0.
+ VINT(113)=0.
+ VINT(114)=0.
+ VINT(115)=0.
+ VINT(116)=0.
+ ELSEIF(MSTP(44).EQ.2) THEN
+C...Only Z0 production included
+ VINT(111)=0.
+ VINT(112)=0.
+ VINT(113)=0.
+ VINT(115)=0.
+ VINT(116)=0.
+ ELSEIF(MSTP(44).EQ.3) THEN
+C...Only Z'0 production included
+ VINT(111)=0.
+ VINT(112)=0.
+ VINT(113)=0.
+ VINT(114)=0.
+ VINT(115)=0.
+ ELSEIF(MSTP(44).EQ.4) THEN
+C...Only gamma*/Z0 production included
+ VINT(113)=0.
+ VINT(115)=0.
+ VINT(116)=0.
+ ELSEIF(MSTP(44).EQ.5) THEN
+C...Only gamma*/Z'0 production included
+ VINT(112)=0.
+ VINT(114)=0.
+ VINT(115)=0.
+ ELSEIF(MSTP(44).EQ.6) THEN
+C...Only Z0/Z'0 production included
+ VINT(111)=0.
+ VINT(112)=0.
+ VINT(113)=0.
+ ENDIF
+
+ ELSEIF(KFLA.EQ.37) THEN
+C...H+/-:
+ DO 190 I=1,MDCY(37,3)
+ IDC=I+MDCY(37,2)-1
+ RM1=(PMAS(IABS(KFDP(IDC,1)),1)/RMAS)**2
+ RM2=(PMAS(IABS(KFDP(IDC,2)),1)/RMAS)**2
+ IF(SQRT(RM1)+SQRT(RM2).GT.1..OR.MDME(IDC,1).LT.0) GOTO 190
+ IF(I.LE.4) THEN
+C...H+/- -> q + qb'
+ WDTP(I)=3.*((RM1*PARU(121)+RM2/PARU(121))*
+ & (1.-RM1-RM2)-4.*RM1*RM2)*
+ & SQRT(MAX(0.,(1.-RM1-RM2)**2-4.*RM1*RM2))*RADC
+ WID2=1.
+ ELSE
+C...H+/- -> l+/- + nu
+ WDTP(I)=((RM1*PARU(121)+RM2/PARU(121))*
+ & (1.-RM1-RM2)-4.*RM1*RM2)*
+ & SQRT(MAX(0.,(1.-RM1-RM2)**2-4.*RM1*RM2))
+ WID2=1.
+ ENDIF
+ WDTP(0)=WDTP(0)+WDTP(I)
+ IF(MDME(IDC,1).GT.0) THEN
+ WDTE(I,MDME(IDC,1))=WDTP(I)*WID2
+ WDTE(0,MDME(IDC,1))=WDTE(0,MDME(IDC,1))+WDTE(I,MDME(IDC,1))
+ WDTE(I,0)=WDTE(I,MDME(IDC,1))
+ WDTE(0,0)=WDTE(0,0)+WDTE(I,0)
+ ENDIF
+ 190 CONTINUE
+
+ ELSEIF(KFLA.EQ.40) THEN
+C...R:
+ DO 200 I=1,MDCY(40,3)
+ IDC=I+MDCY(40,2)-1
+ RM1=(PMAS(IABS(KFDP(IDC,1)),1)/RMAS)**2
+ RM2=(PMAS(IABS(KFDP(IDC,2)),1)/RMAS)**2
+ IF(SQRT(RM1)+SQRT(RM2).GT.1..OR.MDME(IDC,1).LT.0) GOTO 200
+ IF(I.LE.4) THEN
+C...R -> q + qb'
+ WDTP(I)=3.*RADC
+ WID2=1.
+ ELSE
+C...R -> l+ + l'-
+ WDTP(I)=1.
+ WID2=1.
+ ENDIF
+ WDTP(0)=WDTP(0)+WDTP(I)
+ IF(MDME(IDC,1).GT.0) THEN
+ WDTE(I,MDME(IDC,1))=WDTP(I)*WID2
+ WDTE(0,MDME(IDC,1))=WDTE(0,MDME(IDC,1))+WDTE(I,MDME(IDC,1))
+ WDTE(I,0)=WDTE(I,MDME(IDC,1))
+ WDTE(0,0)=WDTE(0,0)+WDTE(I,0)
+ ENDIF
+ 200 CONTINUE
+
+ ENDIF
+ MINT(61)=0
+
+ RETURN
+ END
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff