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Herwig 7.3.0
PScalarPScalarVectorDecayer.h
1// -*- C++ -*-
2//
3// PScalarPScalarVectorDecayer.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_PScalarPScalarVectorDecayer_H
10#define HERWIG_PScalarPScalarVectorDecayer_H
11//
12// This is the declaration of the PScalarPScalarVectorDecayer 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 ThePEG;
20
41
42public:
43
50 virtual int modeNumber(bool & cc, tcPDPtr parent,
51 const tPDVector & children) const;
52
62 double me2(const int ichan,const Particle & part,
63 const tPDVector & outgoing,
64 const vector<Lorentz5Momentum> & momenta,
65 MEOption meopt) const;
66
70 virtual void constructSpinInfo(const Particle & part,
72
81 bool twoBodyMEcode(const DecayMode & dm, int & mecode, double & coupling) const;
82
83public:
84
92
98 void persistentInput(PersistentIStream & is, int version);
100
104 static void Init();
105
111 virtual void dataBaseOutput(ofstream & os,bool header) const;
112
113protected:
114
121 virtual IBPtr clone() const {return new_ptr(*this);}
122
127 virtual IBPtr fullclone() const {return new_ptr(*this);}
129
130protected:
131
134
140 virtual void doinit();
141
145 virtual void doinitrun();
147
148public:
149
153 string setUpDecayMode(string arg);
154
155private:
156
161
162private:
163
167 vector<int> incoming_;
168
172 vector<pair<int,int> > outgoing_;
173
177 vector<double> coupling_;
178
182 vector<double> maxWeight_;
183
188
192 mutable vector<Helicity::LorentzPolarizationVector> vectors_;
193};
194
195}
196
197
198#endif /* HERWIG_PScalarPScalarVectorDecayer_H */
Main class for Decayers implementing multi-channel phase space integration.
MEOption
Enum for the matrix element option.
The PScalarPScalarVectorDecayer class is designed to perform the decay of a pseudoscalar meson to ano...
virtual void constructSpinInfo(const Particle &part, ParticleVector outgoing) const
Construct the SpinInfos for the particles produced in the decay.
virtual void doinitrun()
Initialize this object to the begining of the run phase.
string setUpDecayMode(string arg)
Set the parameters for a decay mode.
virtual void dataBaseOutput(ofstream &os, bool header) const
Output the setup information for the particle database.
vector< Helicity::LorentzPolarizationVector > vectors_
Polarization vectors for the decay products.
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.
bool twoBodyMEcode(const DecayMode &dm, int &mecode, double &coupling) const
Specify the matrix element to be used in the running width calculation.
void persistentInput(PersistentIStream &is, int version)
Function used to read in object persistently.
vector< pair< int, int > > outgoing_
the PDG code for the outgoing particles pseudoscalar, then vector
vector< double > coupling_
the coupling for the decay
virtual IBPtr clone() const
Make a simple clone of this object.
static void Init()
Standard Init function used to initialize the interfaces.
vector< int > incoming_
the PDG code for the incoming particle
virtual void doinit()
Initialize this object after the setup phase before saving and EventGenerator to disk.
virtual IBPtr fullclone() const
Make a clone of this object, possibly modifying the cloned object to make it sane.
PScalarPScalarVectorDecayer & operator=(const PScalarPScalarVectorDecayer &)=delete
Private and non-existent assignment operator.
vector< double > maxWeight_
the maximum weight for the decay
virtual int modeNumber(bool &cc, tcPDPtr parent, const tPDVector &children) const
Which of the possible decays is required.
-*- C++ -*-
ThePEG::Ptr< InterfacedBase >::pointer IBPtr
vector< tPDPtr > tPDVector
vector< PPtr > ParticleVector
ThePEG::Ptr< ParticleData >::transient_const_pointer tcPDPtr