herwig
is hosted by
Hepforge
,
IPPP Durham
Herwig
7.3.0
Toggle main menu visibility
Main Page
Related Pages
Modules
Namespaces
Namespace List
Namespace Members
All
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
r
s
t
u
v
w
x
y
z
Functions
a
b
c
d
f
g
h
i
l
m
o
p
r
s
t
u
w
z
Variables
Typedefs
a
b
c
d
h
i
j
k
l
m
o
p
s
t
v
Enumerations
Enumerator
Classes
Class List
Class Index
Class Hierarchy
Class Members
All
_
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
u
v
w
x
y
z
~
Functions
_
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
u
v
w
x
y
z
~
Variables
_
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
u
v
w
x
y
z
Typedefs
a
c
d
e
h
i
m
o
p
r
s
t
u
v
w
x
Enumerations
Enumerator
Related Functions
b
c
d
e
f
g
h
k
m
o
p
s
t
Files
File List
File Members
All
Functions
Variables
Macros
MatrixElement
Gamma
MEGammaGamma2ff.h
1
// -*- C++ -*-
2
#ifndef HERWIG_MEGammaGamma2ff_H
3
#define HERWIG_MEGammaGamma2ff_H
4
//
5
// This is the declaration of the MEGammaGamma2ff class.
6
//
7
8
#include "Herwig/MatrixElement/HwMEBase.h"
9
#include "Herwig/MatrixElement/ProductionMatrixElement.h"
10
#include "ThePEG/Helicity/WaveFunction/SpinorWaveFunction.h"
11
#include "ThePEG/Helicity/WaveFunction/SpinorBarWaveFunction.h"
12
#include "ThePEG/Helicity/WaveFunction/VectorWaveFunction.h"
13
#include "ThePEG/Helicity/Vertex/AbstractFFVVertex.fh"
14
15
namespace
Herwig
{
16
17
using namespace
ThePEG
;
18
26
class
MEGammaGamma2ff
:
public
HwMEBase
{
27
28
public
:
29
33
MEGammaGamma2ff
();
34
41
virtual
unsigned
int
orderInAlphaS
()
const
;
42
47
virtual
unsigned
int
orderInAlphaEW
()
const
;
48
56
virtual
double
me2
()
const
;
57
61
virtual
Energy2
scale
()
const
;
62
66
virtual
void
getDiagrams
()
const
;
67
76
virtual
Selector<DiagramIndex>
diagrams
(
const
DiagramVector
& dv)
const
;
77
85
virtual
Selector<const ColourLines *>
86
colourGeometries
(tcDiagPtr diag)
const
;
87
91
virtual
void
constructVertex
(
tSubProPtr
);
93
94
public
:
95
102
void
persistentOutput
(
PersistentOStream
& os)
const
;
103
109
void
persistentInput
(
PersistentIStream
& is,
int
version);
111
118
static
void
Init
();
119
120
protected
:
121
130
double
helicityME
(vector<VectorWaveFunction> &p1,vector<VectorWaveFunction> &p2,
131
vector<SpinorBarWaveFunction> & f,
132
vector<SpinorWaveFunction> & fbar,
bool
calc)
const
;
133
protected
:
134
141
virtual
IBPtr
clone
()
const
{
return
new_ptr(*
this
);}
142
147
virtual
IBPtr
fullclone
()
const
{
return
new_ptr(*
this
);}
149
150
protected
:
151
159
virtual
void
doinit
();
161
162
private
:
163
168
MEGammaGamma2ff
&
operator=
(
const
MEGammaGamma2ff
&) =
delete
;
169
170
private
:
171
175
int
process_
;
176
180
AbstractFFVVertexPtr
vertex_
;
181
185
mutable
ProductionMatrixElement
me_
;
186
187
};
188
189
}
190
191
#endif
/* HERWIG_MEGammaGamma2ff_H */
Herwig::HwMEBase
The HwMEBase class serves a number of purposes.
Definition:
HwMEBase.h:35
Herwig::MEGammaGamma2ff
The MEGammaGamma2ff class provides the matrix elements for .
Definition:
MEGammaGamma2ff.h:26
Herwig::MEGammaGamma2ff::diagrams
virtual Selector< DiagramIndex > diagrams(const DiagramVector &dv) const
Get diagram selector.
Herwig::MEGammaGamma2ff::persistentInput
void persistentInput(PersistentIStream &is, int version)
Function used to read in object persistently.
Herwig::MEGammaGamma2ff::me_
ProductionMatrixElement me_
Matrix element.
Definition:
MEGammaGamma2ff.h:185
Herwig::MEGammaGamma2ff::process_
int process_
Which processes to include.
Definition:
MEGammaGamma2ff.h:175
Herwig::MEGammaGamma2ff::getDiagrams
virtual void getDiagrams() const
Add all possible diagrams with the add() function.
Herwig::MEGammaGamma2ff::me2
virtual double me2() const
The matrix element for the kinematical configuration previously provided by the last call to setKinem...
Herwig::MEGammaGamma2ff::fullclone
virtual IBPtr fullclone() const
Make a clone of this object, possibly modifying the cloned object to make it sane.
Definition:
MEGammaGamma2ff.h:147
Herwig::MEGammaGamma2ff::constructVertex
virtual void constructVertex(tSubProPtr)
Construct the vertex of spin correlations.
Herwig::MEGammaGamma2ff::vertex_
AbstractFFVVertexPtr vertex_
Pointer to the photon vertex.
Definition:
MEGammaGamma2ff.h:180
Herwig::MEGammaGamma2ff::orderInAlphaEW
virtual unsigned int orderInAlphaEW() const
Return the order in in which this matrix element is given.
Herwig::MEGammaGamma2ff::persistentOutput
void persistentOutput(PersistentOStream &os) const
Function used to write out object persistently.
Herwig::MEGammaGamma2ff::MEGammaGamma2ff
MEGammaGamma2ff()
The default constructor.
Herwig::MEGammaGamma2ff::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::MEGammaGamma2ff::helicityME
double helicityME(vector< VectorWaveFunction > &p1, vector< VectorWaveFunction > &p2, vector< SpinorBarWaveFunction > &f, vector< SpinorWaveFunction > &fbar, bool calc) const
Matrix element for .
Herwig::MEGammaGamma2ff::Init
static void Init()
The standard Init function used to initialize the interfaces.
Herwig::MEGammaGamma2ff::orderInAlphaS
virtual unsigned int orderInAlphaS() const
Return the order in in which this matrix element is given.
Herwig::MEGammaGamma2ff::scale
virtual Energy2 scale() const
Return the scale associated with the last set phase space point.
Herwig::MEGammaGamma2ff::clone
virtual IBPtr clone() const
Make a simple clone of this object.
Definition:
MEGammaGamma2ff.h:141
Herwig::MEGammaGamma2ff::doinit
virtual void doinit()
Initialize this object after the setup phase before saving an EventGenerator to disk.
Herwig::MEGammaGamma2ff::operator=
MEGammaGamma2ff & operator=(const MEGammaGamma2ff &)=delete
The assignment operator is private and must never be called.
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
ThePEG::IBPtr
ThePEG::Ptr< InterfacedBase >::pointer IBPtr
ThePEG::tSubProPtr
ThePEG::Ptr< SubProcess >::transient_pointer tSubProPtr
Generated on Thu Jun 20 2024 17:50:52 for Herwig by
1.9.6