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MatrixElement
Gamma
MEGammaGamma2WW.h
1
// -*- C++ -*-
2
#ifndef HERWIG_MEGammaGamma2WW_H
3
#define HERWIG_MEGammaGamma2WW_H
4
//
5
// This is the declaration of the MEGammaGamma2WW class.
6
//
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8
#include "Herwig/MatrixElement/HwMEBase.h"
9
#include "ThePEG/Helicity/WaveFunction/VectorWaveFunction.h"
10
#include "ThePEG/Helicity/Vertex/AbstractVVVVertex.fh"
11
#include "ThePEG/Helicity/Vertex/AbstractVVVVVertex.fh"
12
#include "Herwig/MatrixElement/ProductionMatrixElement.h"
13
14
namespace
Herwig
{
15
using namespace
ThePEG
;
16
using namespace
ThePEG::Helicity
;
17
25
class
MEGammaGamma2WW
:
public
HwMEBase
{
26
27
public
:
28
32
MEGammaGamma2WW
();
33
40
virtual
unsigned
int
orderInAlphaS
()
const
;
41
46
virtual
unsigned
int
orderInAlphaEW
()
const
;
47
55
virtual
double
me2
()
const
;
56
60
virtual
Energy2
scale
()
const
;
61
65
virtual
void
getDiagrams
()
const
;
66
75
virtual
Selector<DiagramIndex>
diagrams
(
const
DiagramVector
& dv)
const
;
76
84
virtual
Selector<const ColourLines *>
85
colourGeometries
(tcDiagPtr diag)
const
;
86
90
virtual
void
constructVertex
(
tSubProPtr
);
92
93
public
:
94
101
void
persistentOutput
(
PersistentOStream
& os)
const
;
102
108
void
persistentInput
(
PersistentIStream
& is,
int
version);
110
117
static
void
Init
();
118
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protected
:
120
129
double
helicityME
(vector<VectorWaveFunction> & p1,
130
vector<VectorWaveFunction> & p2,
131
vector<VectorWaveFunction> & w1,
132
vector<VectorWaveFunction> & w2,
bool
calc)
const
;
133
134
protected
:
135
142
virtual
IBPtr
clone
()
const
;
143
148
virtual
IBPtr
fullclone
()
const
;
150
151
protected
:
152
160
virtual
void
doinit
();
162
163
private
:
164
169
MEGammaGamma2WW
&
operator=
(
const
MEGammaGamma2WW
&) =
delete
;
170
171
private
:
172
176
unsigned
int
massOption_
;
177
181
AbstractVVVVertexPtr
WWWVertex_
;
182
186
AbstractVVVVVertexPtr
WWWWVertex_
;
187
191
mutable
ProductionMatrixElement
me_
;
192
193
};
194
195
}
196
197
#endif
/* HERWIG_MEGammaGamma2WW_H */
Herwig::HwMEBase
The HwMEBase class serves a number of purposes.
Definition:
HwMEBase.h:35
Herwig::MEGammaGamma2WW
The MEGammaGamma2WW class provides the matrix elements for .
Definition:
MEGammaGamma2WW.h:25
Herwig::MEGammaGamma2WW::fullclone
virtual IBPtr fullclone() const
Make a clone of this object, possibly modifying the cloned object to make it sane.
Herwig::MEGammaGamma2WW::orderInAlphaS
virtual unsigned int orderInAlphaS() const
Return the order in in which this matrix element is given.
Herwig::MEGammaGamma2WW::diagrams
virtual Selector< DiagramIndex > diagrams(const DiagramVector &dv) const
Get diagram selector.
Herwig::MEGammaGamma2WW::clone
virtual IBPtr clone() const
Make a simple clone of this object.
Herwig::MEGammaGamma2WW::helicityME
double helicityME(vector< VectorWaveFunction > &p1, vector< VectorWaveFunction > &p2, vector< VectorWaveFunction > &w1, vector< VectorWaveFunction > &w2, bool calc) const
Matrix element for .
Herwig::MEGammaGamma2WW::WWWVertex_
AbstractVVVVertexPtr WWWVertex_
Pointer to the gammaWW vertex.
Definition:
MEGammaGamma2WW.h:181
Herwig::MEGammaGamma2WW::me_
ProductionMatrixElement me_
Matrix element.
Definition:
MEGammaGamma2WW.h:191
Herwig::MEGammaGamma2WW::scale
virtual Energy2 scale() const
Return the scale associated with the last set phase space point.
Herwig::MEGammaGamma2WW::constructVertex
virtual void constructVertex(tSubProPtr)
Construct the vertex of spin correlations.
Herwig::MEGammaGamma2WW::persistentOutput
void persistentOutput(PersistentOStream &os) const
Function used to write out object persistently.
Herwig::MEGammaGamma2WW::MEGammaGamma2WW
MEGammaGamma2WW()
The default constructor.
Herwig::MEGammaGamma2WW::colourGeometries
virtual Selector< const ColourLines * > colourGeometries(tcDiagPtr diag) const
Return a Selector with possible colour geometries for the selected diagram weighted by their relative...
Herwig::MEGammaGamma2WW::WWWWVertex_
AbstractVVVVVertexPtr WWWWVertex_
Pointer to the gammagammaWW vertex.
Definition:
MEGammaGamma2WW.h:186
Herwig::MEGammaGamma2WW::massOption_
unsigned int massOption_
Treatment of the the W mass.
Definition:
MEGammaGamma2WW.h:176
Herwig::MEGammaGamma2WW::persistentInput
void persistentInput(PersistentIStream &is, int version)
Function used to read in object persistently.
Herwig::MEGammaGamma2WW::getDiagrams
virtual void getDiagrams() const
Add all possible diagrams with the add() function.
Herwig::MEGammaGamma2WW::doinit
virtual void doinit()
Initialize this object after the setup phase before saving an EventGenerator to disk.
Herwig::MEGammaGamma2WW::me2
virtual double me2() const
The matrix element for the kinematical configuration previously provided by the last call to setKinem...
Herwig::MEGammaGamma2WW::Init
static void Init()
The standard Init function used to initialize the interfaces.
Herwig::MEGammaGamma2WW::operator=
MEGammaGamma2WW & operator=(const MEGammaGamma2WW &)=delete
The assignment operator is private and must never be called.
Herwig::MEGammaGamma2WW::orderInAlphaEW
virtual unsigned int orderInAlphaEW() const
Return the order in in which this matrix element is given.
Herwig::ProductionMatrixElement
The storage of the helicity amplitude expression for the matrix element of a hard process.
Definition:
ProductionMatrixElement.h:34
ThePEG::MEBase::DiagramVector
vector< DiagPtr > DiagramVector
ThePEG::PersistentIStream
ThePEG::PersistentOStream
ThePEG::Selector
Herwig
-*- C++ -*-
Definition:
BasicConsistency.h:17
ThePEG::Helicity
ThePEG
ThePEG::IBPtr
ThePEG::Ptr< InterfacedBase >::pointer IBPtr
ThePEG::tSubProPtr
ThePEG::Ptr< SubProcess >::transient_pointer tSubProPtr
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