herwig
is hosted by
Hepforge
,
IPPP Durham
Herwig
7.3.0
Decay
General
SVVDecayer.h
1
// -*- C++ -*-
2
//
3
// SVVDecayer.h is a part of Herwig - A multi-purpose Monte Carlo event generator
4
// Copyright (C) 2002-2019 The Herwig Collaboration
5
//
6
// Herwig is licenced under version 3 of the GPL, see COPYING for details.
7
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
8
//
9
#ifndef HERWIG_SVVDecayer_H
10
#define HERWIG_SVVDecayer_H
11
//
12
// This is the declaration of the SVVDecayer class.
13
//
14
15
#include "GeneralTwoBodyDecayer.h"
16
#include "ThePEG/Repository/EventGenerator.h"
17
#include "ThePEG/Helicity/Vertex/Scalar/VVSVertex.h"
18
#include "ThePEG/Helicity/WaveFunction/ScalarWaveFunction.h"
19
#include "ThePEG/Helicity/WaveFunction/VectorWaveFunction.h"
20
21
namespace
Herwig
{
22
using namespace
ThePEG
;
23
using
Helicity::VVSVertexPtr;
24
35
class
SVVDecayer
:
public
GeneralTwoBodyDecayer
{
36
37
public
:
38
42
SVVDecayer
() {}
43
55
double
me2
(
const
int
ichan,
const
Particle
& part,
56
const
tPDVector
&
outgoing
,
57
const
vector<Lorentz5Momentum> & momenta,
58
MEOption
meopt)
const
;
59
63
virtual
void
constructSpinInfo
(
const
Particle
& part,
64
ParticleVector
outgoing
)
const
;
65
72
virtual
Energy
partialWidth
(
PMPair
inpart,
PMPair
outa,
73
PMPair
outb)
const
;
74
78
virtual
void
setDecayInfo
(
PDPtr
incoming
,
PDPair
outgoing
,
79
vector<VertexBasePtr>,
80
map<ShowerInteraction,VertexBasePtr> &,
81
const
vector<map<ShowerInteraction,VertexBasePtr> > &,
82
map<ShowerInteraction,VertexBasePtr>);
83
87
virtual
POWHEGType
hasPOWHEGCorrection
() {
88
POWHEGType
output = FSR;
89
for
(
auto
vertex :
vertex_
) {
90
if
(vertex->orderInAllCouplings()!=1) {
91
output = No;
92
break
;
93
}
94
}
95
return
output;
96
}
97
101
virtual
double
threeBodyME
(
const
int
,
const
Particle
& inpart,
102
const
ParticleVector
&
decay
,
103
ShowerInteraction
inter,
MEOption
meopt);
105
106
public
:
107
114
void
persistentOutput
(
PersistentOStream
& os)
const
;
115
121
void
persistentInput
(
PersistentIStream
& is,
int
version);
123
130
static
void
Init
();
131
132
protected
:
133
140
virtual
IBPtr
clone
()
const
;
141
146
virtual
IBPtr
fullclone
()
const
;
148
149
protected
:
150
154
void
identifyVertices
(
const
Particle
& inpart,
const
ParticleVector
&
decay
,
155
AbstractVVVVertexPtr & outgoingVertex1,
156
AbstractVVVVertexPtr & outgoingVertex2,
157
ShowerInteraction
inter);
158
159
private
:
160
165
SVVDecayer
&
operator=
(
const
SVVDecayer
&) =
delete
;
166
167
private
:
168
172
vector<AbstractVVSVertexPtr>
vertex_
;
173
177
vector<VVSVertexPtr>
perturbativeVertex_
;
178
182
map<ShowerInteraction,AbstractVSSVertexPtr>
incomingVertex_
;
183
187
map<ShowerInteraction,AbstractVVVVertexPtr>
outgoingVertex1_
;
188
192
map<ShowerInteraction,AbstractVVVVertexPtr>
outgoingVertex2_
;
193
197
mutable
RhoDMatrix
rho_
;
198
202
mutable
Helicity::ScalarWaveFunction
swave_
;
203
207
mutable
vector<Helicity::VectorWaveFunction>
vectors_
[2];
208
209
private
:
210
218
mutable
RhoDMatrix
rho3_
;
219
223
mutable
ScalarWaveFunction
swave3_
;
224
228
mutable
vector<Helicity::VectorWaveFunction>
vectors3_
[2];
229
233
mutable
vector<Helicity::VectorWaveFunction>
gluon_
;
235
};
236
237
}
238
239
#endif
/* HERWIG_SVVDecayer_H */
Herwig::DecayIntegrator::MEOption
MEOption
Enum for the matrix element option.
Definition:
DecayIntegrator.h:72
Herwig::GeneralTwoBodyDecayer
The GeneralTwoBodyDecayer class is designed to be the base class for 2 body decays for some general m...
Definition:
GeneralTwoBodyDecayer.h:38
Herwig::GeneralTwoBodyDecayer::decay
virtual ParticleVector decay(const Particle &parent, const tPDVector &children) const
For a given decay mode and a given particle instance, perform the decay and return the decay products...
Herwig::GeneralTwoBodyDecayer::PMPair
pair< tcPDPtr, Energy > PMPair
A ParticleData ptr and (possible) mass pair.
Definition:
GeneralTwoBodyDecayer.h:43
Herwig::HwDecayerBase::POWHEGType
POWHEGType
Virtual members to be overridden by inheriting classes which implement hard corrections.
Definition:
HwDecayerBase.h:76
Herwig::SVVDecayer
This SVVDecayer class implements the decay of a scalar to 2 vector bosons using either the tree level...
Definition:
SVVDecayer.h:35
Herwig::SVVDecayer::constructSpinInfo
virtual void constructSpinInfo(const Particle &part, ParticleVector outgoing) const
Construct the SpinInfos for the particles produced in the decay.
Herwig::SVVDecayer::rho3_
RhoDMatrix rho3_
Member for the POWHEG correction.
Definition:
SVVDecayer.h:218
Herwig::SVVDecayer::identifyVertices
void identifyVertices(const Particle &inpart, const ParticleVector &decay, AbstractVVVVertexPtr &outgoingVertex1, AbstractVVVVertexPtr &outgoingVertex2, ShowerInteraction inter)
Find the vertices for the decay.
Herwig::SVVDecayer::SVVDecayer
SVVDecayer()
The default constructor.
Definition:
SVVDecayer.h:42
Herwig::SVVDecayer::setDecayInfo
virtual void setDecayInfo(PDPtr incoming, PDPair outgoing, vector< VertexBasePtr >, map< ShowerInteraction, VertexBasePtr > &, const vector< map< ShowerInteraction, VertexBasePtr > > &, map< ShowerInteraction, VertexBasePtr >)
Set the information on the decay.
Herwig::SVVDecayer::Init
static void Init()
The standard Init function used to initialize the interfaces.
Herwig::SVVDecayer::perturbativeVertex_
vector< VVSVertexPtr > perturbativeVertex_
Pointer to the perturbative form.
Definition:
SVVDecayer.h:177
Herwig::SVVDecayer::partialWidth
virtual Energy partialWidth(PMPair inpart, PMPair outa, PMPair outb) const
Function to return partial Width.
Herwig::SVVDecayer::me2
double me2(const int ichan, const Particle &part, const tPDVector &outgoing, const vector< Lorentz5Momentum > &momenta, MEOption meopt) const
Return the matrix element squared for a given mode and phase-space channel.
Herwig::SVVDecayer::clone
virtual IBPtr clone() const
Make a simple clone of this object.
Herwig::SVVDecayer::vectors3_
vector< Helicity::VectorWaveFunction > vectors3_[2]
Vector wavefunctions.
Definition:
SVVDecayer.h:228
Herwig::SVVDecayer::incomingVertex_
map< ShowerInteraction, AbstractVSSVertexPtr > incomingVertex_
Abstract pointer to AbstractVSSVertex for QCD radiation from incoming scalar.
Definition:
SVVDecayer.h:182
Herwig::SVVDecayer::threeBodyME
virtual double threeBodyME(const int, const Particle &inpart, const ParticleVector &decay, ShowerInteraction inter, MEOption meopt)
Three-body matrix element including additional QCD radiation.
Herwig::SVVDecayer::swave3_
ScalarWaveFunction swave3_
Scalar wavefunction for 3 body decay.
Definition:
SVVDecayer.h:223
Herwig::SVVDecayer::vertex_
vector< AbstractVVSVertexPtr > vertex_
Abstract pointer to general VVS vertex.
Definition:
SVVDecayer.h:172
Herwig::SVVDecayer::gluon_
vector< Helicity::VectorWaveFunction > gluon_
Vector wavefunction for 3 body decay.
Definition:
SVVDecayer.h:233
Herwig::SVVDecayer::rho_
RhoDMatrix rho_
Spin density matrix.
Definition:
SVVDecayer.h:197
Herwig::SVVDecayer::operator=
SVVDecayer & operator=(const SVVDecayer &)=delete
The assignment operator is private and must never be called.
Herwig::SVVDecayer::swave_
Helicity::ScalarWaveFunction swave_
Scalar wavefunction.
Definition:
SVVDecayer.h:202
Herwig::SVVDecayer::persistentInput
void persistentInput(PersistentIStream &is, int version)
Function used to read in object persistently.
Herwig::SVVDecayer::outgoingVertex1_
map< ShowerInteraction, AbstractVVVVertexPtr > outgoingVertex1_
Abstract pointer to AbstractFFVVertex for QCD radiation from the 1st outgoing vector.
Definition:
SVVDecayer.h:187
Herwig::SVVDecayer::outgoingVertex2_
map< ShowerInteraction, AbstractVVVVertexPtr > outgoingVertex2_
Abstract pointer to AbstractFFVVertex for QCD radiation from the 2nd outgoing vector.
Definition:
SVVDecayer.h:192
Herwig::SVVDecayer::persistentOutput
void persistentOutput(PersistentOStream &os) const
Function used to write out object persistently.
Herwig::SVVDecayer::fullclone
virtual IBPtr fullclone() const
Make a clone of this object, possibly modifying the cloned object to make it sane.
Herwig::SVVDecayer::vectors_
vector< Helicity::VectorWaveFunction > vectors_[2]
Vector wavefunctions.
Definition:
SVVDecayer.h:207
Herwig::SVVDecayer::hasPOWHEGCorrection
virtual POWHEGType hasPOWHEGCorrection()
Has a POWHEG style correction.
Definition:
SVVDecayer.h:87
ThePEG::Helicity::ScalarWaveFunction
ThePEG::Particle
ThePEG::PersistentIStream
ThePEG::PersistentOStream
ThePEG::RhoDMatrix
Herwig::ShowerInteraction
ShowerInteraction
Handy header file to be included in all Shower classes.
Definition:
ShowerInteraction.h:23
Herwig
-*- C++ -*-
Definition:
BasicConsistency.h:17
ThePEG::Helicity::outgoing
outgoing
ThePEG::Helicity::incoming
incoming
ThePEG
ThePEG::IBPtr
ThePEG::Ptr< InterfacedBase >::pointer IBPtr
ThePEG::tPDVector
vector< tPDPtr > tPDVector
ThePEG::ParticleVector
vector< PPtr > ParticleVector
ThePEG::PDPtr
ThePEG::Ptr< ParticleData >::pointer PDPtr
ThePEG::PDPair
pair< PDPtr, PDPtr > PDPair
Generated on Thu Jun 20 2024 17:50:52 for Herwig by
1.9.6