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Herwig 7.3.0
VectorMesonVectorScalarDecayer.h
1// -*- C++ -*-
2//
3// VectorMesonVectorScalarDecayer.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_VectorMesonVectorScalarDecayer_H
10#define HERWIG_VectorMesonVectorScalarDecayer_H
11//
12// This is the declaration of the VectorMesonVectorScalarDecayer class.
13//
14#include "Herwig/Decay/DecayIntegrator.h"
15#include "Herwig/Decay/PhaseSpaceMode.h"
16#include "ThePEG/Helicity/LorentzPolarizationVector.h"
17
18namespace Herwig {
19using namespace Herwig;
20
42
43public:
44
51 virtual int modeNumber(bool & cc, tcPDPtr parent,
52 const tPDVector & children) const;
53
63 double me2(const int ichan,const Particle & part,
64 const tPDVector & outgoing,
65 const vector<Lorentz5Momentum> & momenta,
66 MEOption meopt) const;
67
71 virtual void constructSpinInfo(const Particle & part,
73
79 virtual void dataBaseOutput(ofstream & os,bool header) const;
80
81public:
82
90
96 void persistentInput(PersistentIStream & is, int version);
98
102 static void Init();
103
112 bool twoBodyMEcode(const DecayMode & dm, int & mecode, double & coupling) const;
113
114protected:
115
122 virtual IBPtr clone() const {return new_ptr(*this);}
123
128 virtual IBPtr fullclone() const {return new_ptr(*this);}
130
131protected:
132
140 virtual void doinit();
141
145 virtual void doinitrun();
147
148private:
149
154
155public:
156
160 string setUpDecayMode(string arg);
161
162private:
163
167 vector<InvEnergy> coupling_;
168
172 vector<int> incoming_;
173
177 vector<pair<int,int> > outgoing_;
178
182 vector<double> maxWeight_;
183
188
192 mutable vector<Helicity::LorentzPolarizationVector> vectors_[2];
193
194};
195
196}
197
198
199#endif /* HERWIG_VectorMesonVectorScalarDecayer_H */
Main class for Decayers implementing multi-channel phase space integration.
MEOption
Enum for the matrix element option.
This class is designed for the decay of a vector meson to a spin-1 particle, either a vector meson or...
VectorMesonVectorScalarDecayer & operator=(const VectorMesonVectorScalarDecayer &)=delete
Private and non-existent assignment operator.
vector< InvEnergy > coupling_
coupling for a decay
vector< int > incoming_
PDG codes for the incoming particles.
virtual IBPtr fullclone() const
Make a clone of this object, possibly modifying the cloned object to make it sane.
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.
virtual void constructSpinInfo(const Particle &part, ParticleVector outgoing) const
Construct the SpinInfos for the particles produced in the decay.
virtual int modeNumber(bool &cc, tcPDPtr parent, const tPDVector &children) const
Which of the possible decays is required.
virtual IBPtr clone() const
Make a simple clone of this object.
vector< pair< int, int > > outgoing_
PDG codes for the outgoing particles (vector,scalar)
virtual void dataBaseOutput(ofstream &os, bool header) const
Output the setup information for the particle database.
vector< double > maxWeight_
maximum weight for a decay
string setUpDecayMode(string arg)
Set the parameters for a decay mode.
void persistentOutput(PersistentOStream &os) const
Function used to write out object persistently.
void persistentInput(PersistentIStream &is, int version)
Function used to read in object persistently.
bool twoBodyMEcode(const DecayMode &dm, int &mecode, double &coupling) const
Specify the matrix element to be used in the running width calculation.
virtual void doinitrun()
Initialize this object to the begining of the run phase.
vector< Helicity::LorentzPolarizationVector > vectors_[2]
Polarization vectors.
virtual void doinit()
Initialize this object after the setup phase before saving and EventGenerator to disk.
static void Init()
Standard Init function used to initialize the interfaces.
-*- C++ -*-
ThePEG::Ptr< InterfacedBase >::pointer IBPtr
vector< tPDPtr > tPDVector
vector< PPtr > ParticleVector
ThePEG::Ptr< ParticleData >::transient_const_pointer tcPDPtr