/usr/include/Pythia8/Pythia8/WeakShowerMEs.h is in libpythia8-dev 8.1.86-1.2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | // WeakShowerMEs.h is a part of the PYTHIA event generator.
// Copyright (C) 2014 Torbjorn Sjostrand.
// PYTHIA is licenced under the GNU GPL version 2, see COPYING for details.
// Please respect the MCnet Guidelines, see GUIDELINES for details.
// Header file for the class containg matrix elements needed for
// W/Z emission corrections in both the initial and final state shower.
// WeakShowerMEs: contains the matrix elements.
#ifndef Pythia8_WeakShowerMEs_H
#define Pythia8_WeakShowerMEs_H
#include "Pythia8/Basics.h"
namespace Pythia8 {
//==========================================================================
// The WeakShowerMEs provides ME's needed for W/Z emission in ISR or FSR.
class WeakShowerMEs {
public:
// Constructor.
WeakShowerMEs() {}
// Calculate the 2 to 2 ME uG -> uG, up to a known overall factor.
double getTchanneluGuGME(double sHat,double tHat,double uHat);
// Calculate the 2 to 2 ME ud -> ud, up to a known overall factor.
double getTchannelududME(double sHat,double tHat,double uHat);
// Calculate the 2 to 2 ME uu -> uu, up to a known overall factor.
double getTchanneluuuuME(double sHat,double tHat,double uHat);
// Calculate the 2 to 3 ME uG -> uGZ, up to a known overall factor.
double getTchanneluGuGZME(Vec4 p1,Vec4 p2,Vec4 p3,Vec4 p4,Vec4 p5);
// Calculate the 2 to 3 ME ud -> udZ, up to a known overall factor,
// and with the coupling between Z and d set to zero.
double getTchannelududZME(Vec4 p1,Vec4 p2,Vec4 p3,Vec4 p4,Vec4 p5);
};
//==========================================================================
} // end namespace Pythia8
#endif // Pythia8_WeakShowerMEs_H
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