Page MenuHomeHEPForge
Files F19250924

SMFFPVertex.cc
No OneTemporary
Actions

Size
2 KB
Referenced Files
None
Subscribers
None

SMFFPVertex.cc
View Options

// -*- C++ -*-
//
// SMFFPVertex.cc is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2019 The Herwig Collaboration
//
// Herwig is licenced under version 3 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
//
// This is the implementation of the non-inlined, non-templated member
// functions of the StandardModelFFPVertex class.
//
#include "SMFFPVertex.h"
#include "ThePEG/Utilities/DescribeClass.h"
#include "ThePEG/Interface/ClassDocumentation.h"
#include "ThePEG/Persistency/PersistentOStream.h"
#include "ThePEG/Persistency/PersistentIStream.h"
using namespace Herwig;
using namespace ThePEG;
SMFFPVertex::SMFFPVertex() : _charge(17,0.0), _couplast(0.), _q2last(0.*GeV2) {
orderInGem(1);
orderInGs(0);
colourStructure(ColourStructure::DELTA);
}
void SMFFPVertex::doinit() {
// PDG codes for the particles
// the quarks
for(int ix=1;ix<7;++ix) {
addToList(-ix, ix, 22);
}
// the leptons
for(int ix=11;ix<17;ix+=2) {
addToList(-ix, ix, 22);
}
for(int ix=1;ix<4;++ix) {
_charge[2*ix-1] = generator()->standardModel()->ed();
_charge[2*ix ] = generator()->standardModel()->eu();
_charge[2*ix+9 ] = generator()->standardModel()->ee();
_charge[2*ix+10] = generator()->standardModel()->enu();
}
FFVVertex::doinit();
}
void SMFFPVertex::persistentOutput(PersistentOStream & os) const {
os << _charge;
}
void SMFFPVertex::persistentInput(PersistentIStream & is, int) {
is >> _charge;
}
// Static variable needed for the type description system in ThePEG.
DescribeClass<SMFFPVertex,FFVVertex>
describeHerwigSMFFPVertex("Herwig::SMFFPVertex", "Herwig.so");
void SMFFPVertex::Init() {
static ClassDocumentation<SMFFPVertex> documentation
("The SMFFPVertex class is the implementation of"
"the coupling of the photon to the Standard Model fermions");
}
// coupling for FFP vertex
#ifndef NDEBUG
void SMFFPVertex::setCoupling(Energy2 q2,tcPDPtr aa,tcPDPtr bb,tcPDPtr) {
#else
void SMFFPVertex::setCoupling(Energy2 q2,tcPDPtr aa,tcPDPtr,tcPDPtr) {
#endif
// first the overall normalisation
if(q2!=_q2last||_couplast==0.) {
_couplast = -electroMagneticCoupling(q2);
_q2last=q2;
}
norm(_couplast);
// the left and right couplings
int iferm=abs(aa->id());
assert((iferm>=1 && iferm<=6)||(iferm>=11 &&iferm<=16));
assert(aa->id()==-bb->id());
if(aa->id()<0) {
left(_charge[iferm]);
right(_charge[iferm]);
}
else {
left(-_charge[iferm]);
right(-_charge[iferm]);
}
}

File Metadata

Mime Type
text/x-c
Expires
Tue, Sep 30, 5:45 AM (8 h, 17 m)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
6492055
Default Alt Text
SMFFPVertex.cc (2 KB)

Event Timeline

HEPForge.org · .