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SMHHHVertex.cc
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SMHHHVertex.cc
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// -*- C++ -*-
//
// This is the implementation of the non-inlined, non-templated member
// functions of the SMHHHVertex class.
//
#include "SMHHHVertex.h"
#include "ThePEG/Interface/ClassDocumentation.h"
#include "ThePEG/Persistency/PersistentOStream.h"
#include "ThePEG/Persistency/PersistentIStream.h"
using namespace Herwig;
SMHHHVertex::SMHHHVertex() : ratio_(ZERO), couplast_(0.), q2last_(ZERO) {
orderInGem(1);
orderInGs (0);
}
IBPtr SMHHHVertex::clone() const {
return new_ptr(*this);
}
IBPtr SMHHHVertex::fullclone() const {
return new_ptr(*this);
}
void SMHHHVertex::persistentOutput(PersistentOStream & os) const {
os << ounit(ratio_,GeV);
}
void SMHHHVertex::persistentInput(PersistentIStream & is, int) {
is >> iunit(ratio_,GeV);
}
ClassDescription<SMHHHVertex> SMHHHVertex::initSMHHHVertex;
// Definition of the static class description member.
void SMHHHVertex::Init() {
static ClassDocumentation<SMHHHVertex> documentation
("The SMHHHVertex class implements the triple Higgs"
" coupling in the Standard Model.");
}
void SMHHHVertex::doinit() {
addToList(25,25,25);
SSSVertex::doinit();
ratio_ = -1.5*sqr(getParticleData(ParticleID::h0)->mass())/
getParticleData(ParticleID::Wplus)->mass();
}
#ifndef NDEBUG
void SMHHHVertex::setCoupling(Energy2 q2,tcPDPtr part1,tcPDPtr part2,tcPDPtr part3) {
#else
void SMHHHVertex::setCoupling(Energy2 q2,tcPDPtr,tcPDPtr,tcPDPtr) {
#endif
assert(part1->id()==ParticleID::h0 &&
part2->id()==ParticleID::h0 &&
part3->id()==ParticleID::h0 );
if(q2!=q2last_||couplast_==0.) {
couplast_ = weakCoupling(q2)*ratio_*UnitRemoval::InvE;
q2last_=q2;
}
norm(couplast_);
}

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