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Herwig
7.2.1
Decay
ScalarMeson
EtaPiGammaGammaDecayer.h
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// -*- C++ -*-
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//
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// EtaPiGammaGammaDecayer.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_EtaPiGammaGammaDecayer_H
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#define HERWIG_EtaPiGammaGammaDecayer_H
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// This is the declaration of the EtaPiGammaGammaDecayer class.
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#include "Herwig/Decay/DecayIntegrator.h"
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#include "Herwig/Decay/DecayPhaseSpaceMode.h"
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#include "ThePEG/StandardModel/StandardModelBase.h"
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#include "Herwig/Utilities/Kinematics.h"
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#include "ThePEG/Helicity/LorentzPolarizationVector.h"
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namespace
Herwig
{
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using namespace
ThePEG
;
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class
EtaPiGammaGammaDecayer
:
public
DecayIntegrator
{
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public
:
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EtaPiGammaGammaDecayer
();
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virtual
int
modeNumber(
bool
& cc,
tcPDPtr
parent,
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const
tPDVector
& children)
const
;
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double
me2(
const
int
ichan,
const
Particle
& part,
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const
ParticleVector
& decay,
MEOption
meopt)
const
;
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virtual
WidthCalculatorBasePtr threeBodyMEIntegrator(
const
DecayMode
& dm)
const
;
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virtual
double
threeBodyMatrixElement(
const
int
imode,
const
Energy2 q2,
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const
Energy2 s3,
const
Energy2 s2,
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const
Energy2 s1,
const
Energy m1,
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const
Energy m2,
const
Energy m3)
const
;
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virtual
void
dataBaseOutput(ofstream & os,
bool
header)
const
;
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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
{
return
new_ptr(*
this
);}
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virtual
IBPtr
fullclone
()
const
{
return
new_ptr(*
this
);}
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protected
:
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virtual
void
doinit();
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virtual
void
doinitrun();
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private
:
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EtaPiGammaGammaDecayer
& operator=(
const
EtaPiGammaGammaDecayer
&) =
delete
;
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private
:
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InvEnergy
_grhoomega
;
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Energy
_fpi
;
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Energy
_rhomass
;
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Energy
_rhowidth
;
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double
_grho
;
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Energy
_mpi
;
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double
_rhoconst
;
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bool
_localparameters
;
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double
_ratiofpif8
;
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double
_ratiofpif0
;
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double
_theta
;
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double
_etamax
;
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double
_etapmax
;
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vector<InvEnergy2>
_dconst
;
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vector<InvEnergy2>
_econst
;
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mutable
RhoDMatrix
_rho
;
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mutable
vector<Helicity::LorentzPolarizationVector> _vectors[2];
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};
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}
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#endif
/* HERWIG_EtaPiGammaGammaDecayer_H */
Herwig::EtaPiGammaGammaDecayer::_etamax
double _etamax
the maximum weights for the decay.
Definition:
EtaPiGammaGammaDecayer.h:249
Herwig::EtaPiGammaGammaDecayer::_ratiofpif0
double _ratiofpif0
Ratios of the decay constants .
Definition:
EtaPiGammaGammaDecayer.h:239
Herwig::EtaPiGammaGammaDecayer::_grhoomega
InvEnergy _grhoomega
The coupling of the to and a .
Definition:
EtaPiGammaGammaDecayer.h:194
ThePEG::PersistentIStream
ThePEG::Particle
Herwig::EtaPiGammaGammaDecayer::_localparameters
bool _localparameters
Use local values of the mass and width.
Definition:
EtaPiGammaGammaDecayer.h:229
Herwig::EtaPiGammaGammaDecayer::_etapmax
double _etapmax
the maximum weights for the decay.
Definition:
EtaPiGammaGammaDecayer.h:254
Herwig::EtaPiGammaGammaDecayer::_rhomass
Energy _rhomass
The mass of the .
Definition:
EtaPiGammaGammaDecayer.h:204
ThePEG::PersistentOStream
Herwig::EtaPiGammaGammaDecayer::_rho
RhoDMatrix _rho
Spin density matrix.
Definition:
EtaPiGammaGammaDecayer.h:269
ThePEG::IBPtr
ThePEG::Ptr< InterfacedBase >::pointer IBPtr
Herwig::EtaPiGammaGammaDecayer::_rhoconst
double _rhoconst
Constant for the running width calculation.
Definition:
EtaPiGammaGammaDecayer.h:224
ThePEG
Herwig::EtaPiGammaGammaDecayer::_econst
vector< InvEnergy2 > _econst
The prefactor for the function.
Definition:
EtaPiGammaGammaDecayer.h:264
Herwig::EtaPiGammaGammaDecayer::_dconst
vector< InvEnergy2 > _dconst
The prefactor for the function.
Definition:
EtaPiGammaGammaDecayer.h:259
Herwig::EtaPiGammaGammaDecayer::clone
virtual IBPtr clone() const
Make a simple clone of this object.
Definition:
EtaPiGammaGammaDecayer.h:155
Herwig::EtaPiGammaGammaDecayer::_rhowidth
Energy _rhowidth
The width of the .
Definition:
EtaPiGammaGammaDecayer.h:209
Herwig::DecayIntegrator::MEOption
MEOption
Enum for the matrix element option.
Definition:
DecayIntegrator.h:79
Herwig::EtaPiGammaGammaDecayer
The EtaPiGammaGammaDecayer class implements a VMD model matrix element for taken from hep-ph/0112150...
Definition:
EtaPiGammaGammaDecayer.h:63
Herwig::EtaPiGammaGammaDecayer::_ratiofpif8
double _ratiofpif8
Ratios of the decay constants .
Definition:
EtaPiGammaGammaDecayer.h:234
ThePEG::tPDVector
vector< tPDPtr > tPDVector
Herwig::DecayIntegrator
Main class for Decayers implementing multi-channel phase space integration.
Definition:
DecayIntegrator.h:62
Herwig::EtaPiGammaGammaDecayer::_mpi
Energy _mpi
The mass of the pion.
Definition:
EtaPiGammaGammaDecayer.h:219
ThePEG::tcPDPtr
ThePEG::Ptr< ParticleData >::transient_const_pointer tcPDPtr
Herwig::EtaPiGammaGammaDecayer::_theta
double _theta
the mixing angle, .
Definition:
EtaPiGammaGammaDecayer.h:244
Herwig::EtaPiGammaGammaDecayer::_fpi
Energy _fpi
The pion decay constant, .
Definition:
EtaPiGammaGammaDecayer.h:199
Herwig
-*- C++ -*-
Definition:
BasicConsistency.h:17
ThePEG::DecayMode
Herwig::EtaPiGammaGammaDecayer::_grho
double _grho
The coupling for the conversion of a rho to a photon, .
Definition:
EtaPiGammaGammaDecayer.h:214
ThePEG::ParticleVector
vector< PPtr > ParticleVector
ThePEG::RhoDMatrix
Herwig::EtaPiGammaGammaDecayer::fullclone
virtual IBPtr fullclone() const
Make a clone of this object, possibly modifying the cloned object to make it sane.
Definition:
EtaPiGammaGammaDecayer.h:161
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