#include "isajet/pilot.h"
      FUNCTION WWSS(T,U,T1,U1,T3,U3)
C          DECAY DISTRIBUTION FOR W+ W- PAIRS FROM SCHOONSCHIP(1980).
C          SQUARE OF S GRAPH.
#include "isajet/itapes.inc"
#include "isajet/wwpar.inc"
#if defined(CERNLIB_DOUBLE)
      DOUBLE PRECISION WWSS
      DOUBLE PRECISION T,U,T1,U1,T3,U3
      DOUBLE PRECISION CV2A2
#endif
      CV2A2=CV**2+CA**2
      WWSS=
     1 +CV*CA*T*(-64.*T1*U1*T3+64.*T1*U1*U3+64.*T1*T3*U3+64.*T1*T3**2-6
     1 4.*T1**2*T3-64.*U1*T3*U3-64.*U1*U3**2+64.*U1**2*U3)
     1 +CV*CA*T*U*(-128.*T1*U3-64.*T1*S13+128.*U1*T3+64.*U1*S13+64.*T3*
     1 S13-64.*U3*S13)
     1 +CV*CA*T*WM2*(128.*T1*U3+64.*T1*S13-64.*T1**2-128.*U1*T3+64.*U1*
     1 S13+64.*U1**2-64.*T3*S13+64.*T3**2-64.*U3*S13-64.*U3**2)
     1 +CV*CA*T**2*(-64.*T1*U3-64.*T1*S13+64.*U1*T3+64.*T3*S13)
     1 +CV*CA*U*(-64.*T1*U1*T3+64.*T1*U1*U3+64.*T1*T3*U3+64.*T1*T3**2-6
     1 4.*T1**2*T3-64.*U1*T3*U3-64.*U1*U3**2+64.*U1**2*U3)
      WWSS=WWSS
     1 +CV*CA*U*WM2*(128.*T1*U3-64.*T1*S13-64.*T1**2-128.*U1*T3-64.*U1*
     1 S13+64.*U1**2+64.*T3*S13+64.*T3**2+64.*U3*S13-64.*U3**2)
     1 +CV*CA*U**2*(-64.*T1*U3+64.*U1*T3+64.*U1*S13-64.*U3*S13)
     1 +CV*CA*WM2*(128.*T1*U1*T3-128.*T1*U1*U3-128.*T1*T3*U3-128.*T1*T3
     1 **2+128.*T1**2*T3+128.*U1*T3*U3+128.*U1*U3**2-128.*U1**2*U3)
     1 +CV*CA*WM2**2*(128.*T1*S13+128.*T1**2-128.*U1*S13-128.*U1**2-128
     1 .*T3*S13-128.*T3**2+128.*U3*S13+128.*U3**2)
     1 +CV2A2*(128.*T1*U1*T3*U3-64.*T1**2*T3**2-64.*U1**2*U3**2)
      WWSS=WWSS
     1 +CV2A2*T*(-32.*T1*U1*T3-32.*T1*U1*U3-32.*T1*T3*U3-64.*T1*T3*S13+
     1 32.*T1*T3**2+32.*T1**2*T3-32.*U1*T3*U3+64.*U1*U3*S13+32.*U1*U3**
     1 2+32.*U1**2*U3)
     1 +CV2A2*T*U*(64.*T1*U3+32.*T1*S13+64.*U1*T3+32.*U1*S13+32.*T3*S13
     1 +32.*U3*S13+64.*S13**2)
     1 +CV2A2*T*WM2*(-64.*T1*U3-32.*T1*S13+32.*T1**2-64.*U1*T3+32.*U1*S
     1 13+32.*U1**2-32.*T3*S13+32.*T3**2+32.*U3*S13+32.*U3**2)
     1 +CV2A2*T**2*(32.*T1*U3+32.*T1*S13+32.*U1*T3+32.*T3*S13)
      WWSS=WWSS
     1 +CV2A2*U*(-32.*T1*U1*T3-32.*T1*U1*U3-32.*T1*T3*U3+64.*T1*T3*S13+
     1 32.*T1*T3**2+32.*T1**2*T3-32.*U1*T3*U3-64.*U1*U3*S13+32.*U1*U3**
     1 2+32.*U1**2*U3)
     1 +CV2A2*U*WM2*(-64.*T1*U3+32.*T1*S13+32.*T1**2-64.*U1*T3-32.*U1*S
     1 13+32.*U1**2+32.*T3*S13+32.*T3**2-32.*U3*S13+32.*U3**2)
     1 +CV2A2*U**2*(32.*T1*U3+32.*U1*T3+32.*U1*S13+32.*U3*S13)
     1 +CV2A2*WM2*(64.*T1*U1*T3+64.*T1*U1*U3+64.*T1*T3*U3-64.*T1*T3**2-
     1 64.*T1**2*T3+64.*U1*T3*U3-64.*U1*U3**2-64.*U1**2*U3)
      WWSS=WWSS
     1 +CV2A2*WM2**2*(-64.*T1*S13-64.*T1**2-64.*U1*S13-64.*U1**2-64.*T3
     1 *S13-64.*T3**2-64.*U3*S13-64.*U3**2-64.*S13**2)
      WWSS=2.*WWSS
      RETURN
      END