ISAJET/isasusy/ssgwt7.F

   1 #include "isajet/pilot.h"
   2         REAL FUNCTION SSGWT7(E)
   3 C-----------------------------------------------------------------------
   4 C          SSGLBF: glss -> wiss + tp + bb
   5 C          Baer's FTBW23/Drees' G_7
   6 C-----------------------------------------------------------------------
   7 #if defined(CERNLIB_IMPNONE)
   8       IMPLICIT NONE
   9 #endif
  10 #include "isajet/sssm.inc"
  11 #include "isajet/sspar.inc"
  12 #include "isajet/sstmp.inc"
  13         REAL E
  14         DOUBLE PRECISION ET,MWI,MG,MT,MSB,MST,PT,EBMX
  15         DOUBLE PRECISION DEN,T1,SN,DFTBW,EBMN,XX,XL
  16         DOUBLE PRECISION MB,Z,RDL,DENO,R1,R2,R3,SSDLAM
  17 C
  18         ET=E
  19         MWI=TMP(1)
  20         MG=TMP(2)
  21         MT=TMP(3)
  22         MSB=TMP(4)
  23         MST=TMP(6)
  24         SN=TMP(8)
  25         MB=AMBT
  26 C
  27 C            Rewrite PT=DSQRT(ET**2-MT**2)
  28         PT=DSQRT((ET-MT)*(ET+MT))
  29         Z=(MG**2+MT**2-2*MG*ET+MB**2-MWI**2)/2.
  30         R1=1.D0+MT**2/MG**2-2.D0*ET/MG
  31         R2=MB**2/MG**2
  32         R3=MWI**2/MG**2
  33         RDL=DSQRT(DMAX1(0.D0,SSDLAM(R1,R2,R3)))
  34         DENO=MG**2+MT**2-2*ET*MG
  35         EBMX=(2*Z*(1.D0-ET/MG)+PT*MG*RDL)*MG/2.D0/DENO
  36         EBMN=(2*Z*(1.D0-ET/MG)-PT*MG*RDL)*MG/2.D0/DENO
  37         XX=(MSB**2+2*MG*EBMX-MG**2)/(MSB**2+2*MG*EBMN-MG**2)
  38         XL=DLOG(XX)
  39         DEN=MG**2-2*MG*ET+MT**2-MST**2
  40         T1=2*(EBMX-EBMN)-(MSB**2-MG**2)*XL/MG
  41         DFTBW=.5*SN*MWI*MT*T1/DEN
  42         SSGWT7=DFTBW
  43         RETURN
  44         END