1 #include "isajet/pilot.h"
2 REAL FUNCTION SSGST(S,AMSQ,Z,I,J)
3 C-----------------------------------------------------------------------
4 C Function for Sig(qqbar->z_i + z_j
5 C-----------------------------------------------------------------------
6 #if defined(CERNLIB_IMPNONE)
9 #include "isajet/sssm.inc"
10 #include "isajet/sspar.inc"
11 REAL S,AMSQ,K,Z,MZI,MZJ,RS,TP,BT
16 IF (AMZISS(I).LT.0.) THEN
21 IF (AMZISS(J).LT.0.) THEN
27 K=SQRT(S*S+(MZI**2-MZJ**2)**2-2*S*(MZI**2+MZJ**2))/
29 TP=S*S-(MZI**2-MZJ**2)**2-4*K*S**1.5*Z+4*K*K*S*Z*Z+
30 $ 4*(-1.)**(ITHI+ITHJ+1)*MZI*MZJ*S
31 BT=(S-MZI**2-MZJ**2)/2.-RS*K*Z+AMSQ**2