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Herwig
7.3.0
Decay
Perturbative
SMHiggsFermionsDecayer.h
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// -*- C++ -*-
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//
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// SMHiggsFermionsDecayer.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_SMHiggsFermionsDecayer_H
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#define HERWIG_SMHiggsFermionsDecayer_H
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//
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// This is the declaration of the SMHiggsFermionsDecayer class.
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//
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#include "Herwig/Decay/PerturbativeDecayer.h"
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#include "ThePEG/Helicity/Vertex/AbstractFFSVertex.h"
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#include "Herwig/Decay/PhaseSpaceMode.h"
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namespace
Herwig
{
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using namespace
ThePEG
;
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class
SMHiggsFermionsDecayer
:
public
PerturbativeDecayer
{
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public
:
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SMHiggsFermionsDecayer
();
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virtual
int
modeNumber
(
bool
& ,
tcPDPtr
,
const
tPDVector
& )
const
{
return
-1;}
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virtual
bool
accept
(
tcPDPtr
parent,
const
tPDVector
& children)
const
;
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virtual
ParticleVector
decay
(
const
Particle
& parent,
const
tPDVector
& children)
const
;
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double
me2
(
const
int
ichan,
const
Particle
& part,
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const
tPDVector
&
outgoing
,
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const
vector<Lorentz5Momentum> & momenta,
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MEOption
meopt)
const
;
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virtual
void
constructSpinInfo
(
const
Particle
& part,
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ParticleVector
outgoing
)
const
;
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virtual
void
dataBaseOutput
(ofstream & os,
bool
header)
const
;
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virtual
POWHEGType
hasPOWHEGCorrection
() {
return
FSR;}
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virtual
double
matrixElementRatio
(
const
Particle
& inpart,
const
ParticleVector
& decay2,
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const
ParticleVector
& decay3,
MEOption
meopt,
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ShowerInteraction
inter);
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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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double
calculateLambda
(
double
x,
double
y,
double
z)
const
;
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InvEnergy2
dipoleSubtractionTerm
(
double
x1,
double
x2)
const
;
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InvEnergy2
calculateRealEmission
(
double
x1,
double
x2)
const
;
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double
calculateVirtualTerm
()
const
;
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double
calculateNonSingletTerm
(
double
beta,
double
L)
const
;
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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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SMHiggsFermionsDecayer
&
operator=
(
const
SMHiggsFermionsDecayer
&) =
delete
;
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private
:
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AbstractFFSVertexPtr
_hvertex
;
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vector<double>
_maxwgt
;
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mutable
RhoDMatrix
_rho
;
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mutable
ScalarWaveFunction
_swave
;
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mutable
vector<SpinorWaveFunction>
_wave
;
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mutable
vector<SpinorBarWaveFunction>
_wavebar
;
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private
:
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double
CF_
;
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mutable
Energy
mHiggs_
;
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mutable
double
mu_
;
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mutable
double
mu2_
;
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mutable
double
aS_
;
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vector<tcPDPtr>
partons_
;
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vector<Lorentz5Momentum>
quark_
;
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Lorentz5Momentum
gauge_
;
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PPtr
higgs_
;
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Energy2
mh2_
;
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bool
NLO_
;
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};
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}
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#endif
/* HERWIG_SMHiggsFermionsDecayer_H */
Herwig::DecayIntegrator::MEOption
MEOption
Enum for the matrix element option.
Definition:
DecayIntegrator.h:72
Herwig::HwDecayerBase::POWHEGType
POWHEGType
Virtual members to be overridden by inheriting classes which implement hard corrections.
Definition:
HwDecayerBase.h:76
Herwig::PerturbativeDecayer
The PerturbativeDecayer class is the base class for perturbative decays in Herwig and implements the ...
Definition:
PerturbativeDecayer.h:23
Herwig::SMHiggsFermionsDecayer
The SMHiggsFermionsDecayer class is designed to decay the Standard Model Higgs to the Standard Model ...
Definition:
SMHiggsFermionsDecayer.h:28
Herwig::SMHiggsFermionsDecayer::calculateRealEmission
InvEnergy2 calculateRealEmission(double x1, double x2) const
Real emission term.
Herwig::SMHiggsFermionsDecayer::_wave
vector< SpinorWaveFunction > _wave
Spinor wavefunction.
Definition:
SMHiggsFermionsDecayer.h:217
Herwig::SMHiggsFermionsDecayer::calculateVirtualTerm
double calculateVirtualTerm() const
Virtual term.
Herwig::SMHiggsFermionsDecayer::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::SMHiggsFermionsDecayer::_swave
ScalarWaveFunction _swave
Scalar wavefunction.
Definition:
SMHiggsFermionsDecayer.h:212
Herwig::SMHiggsFermionsDecayer::SMHiggsFermionsDecayer
SMHiggsFermionsDecayer()
The default constructor.
Herwig::SMHiggsFermionsDecayer::mHiggs_
Energy mHiggs_
The Higgs mass.
Definition:
SMHiggsFermionsDecayer.h:233
Herwig::SMHiggsFermionsDecayer::aS_
double aS_
The strong coupling.
Definition:
SMHiggsFermionsDecayer.h:248
Herwig::SMHiggsFermionsDecayer::doinitrun
virtual void doinitrun()
Initialize this object.
Herwig::SMHiggsFermionsDecayer::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::SMHiggsFermionsDecayer::hasPOWHEGCorrection
virtual POWHEGType hasPOWHEGCorrection()
Has a POWHEG style correction.
Definition:
SMHiggsFermionsDecayer.h:87
Herwig::SMHiggsFermionsDecayer::Init
static void Init()
The standard Init function used to initialize the interfaces.
Herwig::SMHiggsFermionsDecayer::mu2_
double mu2_
The square of the reduced mass.
Definition:
SMHiggsFermionsDecayer.h:243
Herwig::SMHiggsFermionsDecayer::calculateLambda
double calculateLambda(double x, double y, double z) const
Calcluate the Kallen function.
Herwig::SMHiggsFermionsDecayer::quark_
vector< Lorentz5Momentum > quark_
The fermion momenta.
Definition:
SMHiggsFermionsDecayer.h:262
Herwig::SMHiggsFermionsDecayer::modeNumber
virtual int modeNumber(bool &, tcPDPtr, const tPDVector &) const
Which of the possible decays is required.
Definition:
SMHiggsFermionsDecayer.h:40
Herwig::SMHiggsFermionsDecayer::accept
virtual bool accept(tcPDPtr parent, const tPDVector &children) const
Check if this decayer can perfom the decay for a particular mode.
Herwig::SMHiggsFermionsDecayer::_hvertex
AbstractFFSVertexPtr _hvertex
Pointer to the Higgs vertex.
Definition:
SMHiggsFermionsDecayer.h:197
Herwig::SMHiggsFermionsDecayer::NLO_
bool NLO_
LO or NLO ?
Definition:
SMHiggsFermionsDecayer.h:283
Herwig::SMHiggsFermionsDecayer::matrixElementRatio
virtual double matrixElementRatio(const Particle &inpart, const ParticleVector &decay2, const ParticleVector &decay3, MEOption meopt, ShowerInteraction inter)
Calculate matrix element ratio R/B.
Herwig::SMHiggsFermionsDecayer::persistentInput
void persistentInput(PersistentIStream &is, int version)
Function used to read in object persistently.
Herwig::SMHiggsFermionsDecayer::partons_
vector< tcPDPtr > partons_
Stuff for the POWHEG correction.
Definition:
SMHiggsFermionsDecayer.h:257
Herwig::SMHiggsFermionsDecayer::calculateNonSingletTerm
double calculateNonSingletTerm(double beta, double L) const
Non-singlet term.
Herwig::SMHiggsFermionsDecayer::_rho
RhoDMatrix _rho
Spin density matrix.
Definition:
SMHiggsFermionsDecayer.h:207
Herwig::SMHiggsFermionsDecayer::operator=
SMHiggsFermionsDecayer & operator=(const SMHiggsFermionsDecayer &)=delete
The assignment operator is private and must never be called.
Herwig::SMHiggsFermionsDecayer::_maxwgt
vector< double > _maxwgt
maximum weights for the different decay modes
Definition:
SMHiggsFermionsDecayer.h:202
Herwig::SMHiggsFermionsDecayer::clone
virtual IBPtr clone() const
Make a simple clone of this object.
Definition:
SMHiggsFermionsDecayer.h:130
Herwig::SMHiggsFermionsDecayer::_wavebar
vector< SpinorBarWaveFunction > _wavebar
Barred spinor wavefunction.
Definition:
SMHiggsFermionsDecayer.h:222
Herwig::SMHiggsFermionsDecayer::higgs_
PPtr higgs_
The Higgs boson.
Definition:
SMHiggsFermionsDecayer.h:272
Herwig::SMHiggsFermionsDecayer::persistentOutput
void persistentOutput(PersistentOStream &os) const
Function used to write out object persistently.
Herwig::SMHiggsFermionsDecayer::gauge_
Lorentz5Momentum gauge_
The momentum of the radiated gauge boson.
Definition:
SMHiggsFermionsDecayer.h:267
Herwig::SMHiggsFermionsDecayer::mu_
double mu_
The reduced mass.
Definition:
SMHiggsFermionsDecayer.h:238
Herwig::SMHiggsFermionsDecayer::dataBaseOutput
virtual void dataBaseOutput(ofstream &os, bool header) const
Output the setup information for the particle database.
Herwig::SMHiggsFermionsDecayer::fullclone
virtual IBPtr fullclone() const
Make a clone of this object, possibly modifying the cloned object to make it sane.
Definition:
SMHiggsFermionsDecayer.h:136
Herwig::SMHiggsFermionsDecayer::CF_
double CF_
The colour factor.
Definition:
SMHiggsFermionsDecayer.h:228
Herwig::SMHiggsFermionsDecayer::dipoleSubtractionTerm
InvEnergy2 dipoleSubtractionTerm(double x1, double x2) const
Dipole subtraction term.
Herwig::SMHiggsFermionsDecayer::constructSpinInfo
virtual void constructSpinInfo(const Particle &part, ParticleVector outgoing) const
Construct the SpinInfos for the particles produced in the decay.
Herwig::SMHiggsFermionsDecayer::doinit
virtual void doinit()
Initialize this object after the setup phase before saving an EventGenerator to disk.
Herwig::SMHiggsFermionsDecayer::mh2_
Energy2 mh2_
Higgs mass squared.
Definition:
SMHiggsFermionsDecayer.h:277
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
ThePEG::IBPtr
ThePEG::Ptr< InterfacedBase >::pointer IBPtr
ThePEG::tPDVector
vector< tPDPtr > tPDVector
ThePEG::PPtr
ThePEG::Ptr< Particle >::pointer PPtr
ThePEG::ParticleVector
vector< PPtr > ParticleVector
ThePEG::tcPDPtr
ThePEG::Ptr< ParticleData >::transient_const_pointer tcPDPtr
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