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Herwig
7.2.1
Decay
General
VSSDecayer.h
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// -*- C++ -*-
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//
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// VSSDecayer.h is a part of Herwig - A multi-purpose Monte Carlo event generator
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// Copyright (C) 2002-2019 The Herwig Collaboration
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//
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// Herwig is licenced under version 3 of the GPL, see COPYING for details.
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// Please respect the MCnet academic guidelines, see GUIDELINES for details.
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//
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#ifndef HERWIG_VSSDecayer_H
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#define HERWIG_VSSDecayer_H
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//
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// This is the declaration of the VSSDecayer class.
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//
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#include "GeneralTwoBodyDecayer.h"
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#include "ThePEG/Helicity/Vertex/Scalar/VSSVertex.h"
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#include "ThePEG/Helicity/Vertex/Vector/VVVVertex.h"
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#include "ThePEG/Repository/EventGenerator.h"
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namespace
Herwig
{
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using namespace
ThePEG
;
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using
Helicity::VSSVertexPtr;
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class
VSSDecayer
:
public
GeneralTwoBodyDecayer
{
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public
:
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VSSDecayer
() {}
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virtual
double
me2(
const
int
ichan,
const
Particle
& part,
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const
ParticleVector
& decay,
MEOption
meopt)
const
;
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virtual
Energy partialWidth(
PMPair
inpart,
PMPair
outa,
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PMPair
outb)
const
;
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virtual
POWHEGType
hasPOWHEGCorrection
() {
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POWHEGType
output = FSR;
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for
(
auto
vertex : vertex_) {
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if
(vertex->orderInAllCouplings()!=1) {
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output = No;
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break
;
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}
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}
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return
output;
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}
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virtual
double
threeBodyME(
const
int
,
const
Particle
& inpart,
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const
ParticleVector
& decay,
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ShowerInteraction
inter,
MEOption
meopt);
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void
identifyVertices(
const
int
iscal,
const
int
ianti,
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const
Particle
& inpart,
const
ParticleVector
& decay,
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AbstractVSSVertexPtr & abstractOutgoingVertexS,
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AbstractVSSVertexPtr & abstractOutgoingVertexA,
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ShowerInteraction
inter);
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virtual
void
setDecayInfo(
PDPtr
incoming
,
PDPair
outgoing
,
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vector<VertexBasePtr>,
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map<ShowerInteraction,VertexBasePtr> &,
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const
vector<map<ShowerInteraction,VertexBasePtr> > &,
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map<ShowerInteraction,VertexBasePtr>);
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public
:
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void
persistentOutput(
PersistentOStream
& os)
const
;
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void
persistentInput(
PersistentIStream
& is,
int
version);
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static
void
Init();
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protected
:
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virtual
IBPtr
clone()
const
;
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virtual
IBPtr
fullclone()
const
;
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private
:
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VSSDecayer
& operator=(
const
VSSDecayer
&) =
delete
;
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private
:
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vector<AbstractVSSVertexPtr>
vertex_
;
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vector<VSSVertexPtr>
perturbativeVertex_
;
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map<ShowerInteraction,AbstractVVVVertexPtr>
incomingVertex_
;
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map<ShowerInteraction,AbstractVSSVertexPtr>
outgoingVertex1_
;
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map<ShowerInteraction,AbstractVSSVertexPtr>
outgoingVertex2_
;
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mutable
RhoDMatrix
rho_
;
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mutable
vector<Helicity::VectorWaveFunction>
vectors_
;
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mutable
RhoDMatrix
rho3_
;
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mutable
vector<Helicity::VectorWaveFunction>
vector3_
;
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mutable
vector<Helicity::VectorWaveFunction>
gluon_
;
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};
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}
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#endif
/* HERWIG_VSSDecayer_H */
ThePEG::PersistentIStream
ThePEG::Particle
Herwig::ShowerInteraction
ShowerInteraction
Handy header file to be included in all Shower classes.
Definition:
ShowerInteraction.h:23
Herwig::VSSDecayer::incomingVertex_
map< ShowerInteraction, AbstractVVVVertexPtr > incomingVertex_
Abstract pointer to AbstractVVVVertex for QCD radiation from incoming vector.
Definition:
VSSDecayer.h:170
ThePEG::PersistentOStream
Herwig::VSSDecayer::outgoingVertex1_
map< ShowerInteraction, AbstractVSSVertexPtr > outgoingVertex1_
Abstract pointer to AbstractFFVVertex for QCD radiation from outgoing scalar.
Definition:
VSSDecayer.h:175
ThePEG::IBPtr
ThePEG::Ptr< InterfacedBase >::pointer IBPtr
Herwig::VSSDecayer::gluon_
vector< Helicity::VectorWaveFunction > gluon_
Vector wavefunction for 3 body decay.
Definition:
VSSDecayer.h:205
ThePEG::Helicity::incoming
incoming
Herwig::GeneralTwoBodyDecayer
The GeneralTwoBodyDecayer class is designed to be the base class for 2 body decays for some general m...
Definition:
GeneralTwoBodyDecayer.h:38
ThePEG
Herwig::GeneralTwoBodyDecayer::PMPair
pair< tcPDPtr, Energy > PMPair
A ParticleData ptr and (possible) mass pair.
Definition:
GeneralTwoBodyDecayer.h:43
ThePEG::Helicity::outgoing
outgoing
Herwig::DecayIntegrator::MEOption
MEOption
Enum for the matrix element option.
Definition:
DecayIntegrator.h:79
Herwig::VSSDecayer::vectors_
vector< Helicity::VectorWaveFunction > vectors_
Polarization vectors for the decaying particle.
Definition:
VSSDecayer.h:190
Herwig::HwDecayerBase::POWHEGType
POWHEGType
Virtual members to be overridden by inheriting classes which implement hard corrections.
Definition:
HwDecayerBase.h:76
Herwig::VSSDecayer::VSSDecayer
VSSDecayer()
The default constructor.
Definition:
VSSDecayer.h:41
ThePEG::PDPair
pair< PDPtr, PDPtr > PDPair
Herwig::VSSDecayer::rho_
RhoDMatrix rho_
Spin density matrix.
Definition:
VSSDecayer.h:185
ThePEG::PDPtr
ThePEG::Ptr< ParticleData >::pointer PDPtr
Herwig::VSSDecayer::vertex_
vector< AbstractVSSVertexPtr > vertex_
Abstract pointer to AbstractVSSVertex.
Definition:
VSSDecayer.h:160
Herwig::VSSDecayer::outgoingVertex2_
map< ShowerInteraction, AbstractVSSVertexPtr > outgoingVertex2_
Abstract pointer to AbstractFFVVertex for QCD radiation from outgoing scalar.
Definition:
VSSDecayer.h:180
Herwig
-*- C++ -*-
Definition:
BasicConsistency.h:17
ThePEG::ParticleVector
vector< PPtr > ParticleVector
ThePEG::RhoDMatrix
Herwig::VSSDecayer::perturbativeVertex_
vector< VSSVertexPtr > perturbativeVertex_
Pointer to the perturbative vertex.
Definition:
VSSDecayer.h:165
Herwig::VSSDecayer
The VSSDecayer class implements the decay of a vector to 2 scalars in a general model.
Definition:
VSSDecayer.h:34
Herwig::VSSDecayer::rho3_
RhoDMatrix rho3_
Spin density matrix for 3 body decay.
Definition:
VSSDecayer.h:195
Herwig::VSSDecayer::hasPOWHEGCorrection
virtual POWHEGType hasPOWHEGCorrection()
Has a POWHEG style correction.
Definition:
VSSDecayer.h:67
Herwig::VSSDecayer::vector3_
vector< Helicity::VectorWaveFunction > vector3_
Vector wavefunction for 3 body decay.
Definition:
VSSDecayer.h:200
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