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Herwig 7.3.0
Spin3MesonVectorScalarDecayer.h
1// -*- C++ -*-
2//
3// Spin3MesonVectorScalarDecayer.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_Spin3MesonVectorScalarDecayer_H
10#define HERWIG_Spin3MesonVectorScalarDecayer_H
11//
12// This is the declaration of the Spin3MesonVectorScalarDecayer class.
13//
14#include "Herwig/Decay/DecayIntegrator.h"
15#include "ThePEG/Helicity/LorentzPolarizationVector.h"
16#include "Herwig/Decay/PhaseSpaceMode.h"
17
18namespace Herwig {
19using namespace ThePEG;
20
44
45public:
46
53 virtual int modeNumber(bool & cc, tcPDPtr parent,
54 const tPDVector & children) const;
55
65 double me2(const int ichan,const Particle & part,
66 const tPDVector & outgoing,
67 const vector<Lorentz5Momentum> & momenta,
68 MEOption meopt) const;
69
73 virtual void constructSpinInfo(const Particle & part,
75
84 bool twoBodyMEcode(const DecayMode & dm, int & mecode, double & coupling) const;
85
91 virtual void dataBaseOutput(ofstream & os,bool header) const;
92
93public:
94
102
108 void persistentInput(PersistentIStream & is, int version);
110
114 static void Init();
115
116protected:
117
124 virtual IBPtr clone() const {return new_ptr(*this);}
125
130 virtual IBPtr fullclone() const {return new_ptr(*this);}
132
133protected:
134
142 virtual void doinit();
143
147 virtual void doinitrun();
149
150private:
151
156
157public:
158
162 string setUpDecayMode(string arg);
163
164private:
165
169 vector<int> incoming_;
170
174 vector<pair<long,long> > outgoing_;
175
179 vector<InvEnergy> coupling_;
180
184 vector<double> maxWeight_;
185
190 mutable vector<Helicity::LorentzRank3Tensor<double> > tensors_;
191
195 mutable vector<Helicity::LorentzPolarizationVector> vectors_;
196
201
202};
203
204}
205
206#endif /* HERWIG_Spin3MesonVectorScalarDecayer_H */
Main class for Decayers implementing multi-channel phase space integration.
MEOption
Enum for the matrix element option.
The Spin3MesonVectorScalarDecayer class is designed for the decay of a rank 3 tensor meson to a vecto...
virtual void doinit()
Initialize this object after the setup phase before saving and EventGenerator to disk.
vector< pair< long, long > > outgoing_
the PDG codes the outgoing particles (vector,scalar)
vector< double > maxWeight_
the maximum weight for the decay
string setUpDecayMode(string arg)
Set the parameters for a decay mode.
void persistentInput(PersistentIStream &is, int version)
Function used to read in object persistently.
virtual void dataBaseOutput(ofstream &os, bool header) const
Output the setup information for the particle database.
vector< Helicity::LorentzRank3Tensor< double > > tensors_
Storage of polarization tensors to try and increase speed.
virtual void doinitrun()
Initialize this object to the begining of the run phase.
static void Init()
Standard Init function used to initialize the interfaces.
virtual int modeNumber(bool &cc, tcPDPtr parent, const tPDVector &children) const
Which of the possible decays is required.
virtual void constructSpinInfo(const Particle &part, ParticleVector outgoing) const
Construct the SpinInfos for the particles produced in the decay.
vector< InvEnergy > coupling_
the coupling for the decay
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.
void persistentOutput(PersistentOStream &os) const
Function used to write out object persistently.
virtual IBPtr clone() const
Make a simple clone of this object.
vector< Helicity::LorentzPolarizationVector > vectors_
Storage of the polarization vectors.
virtual IBPtr fullclone() const
Make a clone of this object, possibly modifying the cloned object to make it sane.
vector< int > incoming_
the PDG codes for the incoming particles
bool twoBodyMEcode(const DecayMode &dm, int &mecode, double &coupling) const
Specify the matrix element to be used in the running width calculation.
Spin3MesonVectorScalarDecayer & operator=(const Spin3MesonVectorScalarDecayer &)=delete
Private and non-existent assignment operator.
-*- C++ -*-
ThePEG::Ptr< InterfacedBase >::pointer IBPtr
vector< tPDPtr > tPDVector
vector< PPtr > ParticleVector
ThePEG::Ptr< ParticleData >::transient_const_pointer tcPDPtr