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Herwig 7.3.0
ScalarScalarScalarDecayer.h
1// -*- C++ -*-
2//
3// ScalarScalarScalarDecayer.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_ScalarScalarScalarDecayer_H
10#define HERWIG_ScalarScalarScalarDecayer_H
11// This is the declaration of the ScalarScalarScalarDecayer class.
12
13#include "Herwig/Decay/DecayIntegrator.h"
14#include "Herwig/Decay/PhaseSpaceMode.h"
15
16namespace Herwig {
17using namespace ThePEG;
18
37
38public:
39
46 virtual int modeNumber(bool & cc, tcPDPtr parent,
47 const tPDVector & children) const;
48
58 double me2(const int ichan,const Particle & part,
59 const tPDVector & outgoing,
60 const vector<Lorentz5Momentum> & momenta,
61 MEOption meopt) const;
62
66 virtual void constructSpinInfo(const Particle & part,
68
77 bool twoBodyMEcode(const DecayMode & dm, int & mecode, double & coupling) const;
78
84 virtual void dataBaseOutput(ofstream & os,bool header) const;
85
86public:
87
95
101 void persistentInput(PersistentIStream & is, int version);
103
107 static void Init();
108
109protected:
110
117 virtual IBPtr clone() const {return new_ptr(*this);}
118
123 virtual IBPtr fullclone() const {return new_ptr(*this);}
125
126protected:
127
135 virtual void doinit();
136
140 virtual void doinitrun();
142
143private:
144
149
150public:
151
155 string setUpDecayMode(string arg);
156
157private:
158
162 vector<int> incoming_;
163
167 vector<pair<int,int> > outgoing_;
168
172 vector<Energy> coupling_;
173
177 vector<double> maxWeight_;
178
183};
184
185}
186
187#endif /* HERWIG_ScalarScalarScalarDecayer_H */
Main class for Decayers implementing multi-channel phase space integration.
MEOption
Enum for the matrix element option.
The ScalarScalarScalarDecayer class is designed for the decay of a scalar meson to two scalar mesons.
vector< Energy > 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.
static void Init()
Standard Init function used to initialize the interfaces.
virtual void constructSpinInfo(const Particle &part, ParticleVector outgoing) const
Construct the SpinInfos for the particles produced in the decay.
bool twoBodyMEcode(const DecayMode &dm, int &mecode, double &coupling) const
Specify the matrix element to be used in the running width calculation.
RhoDMatrix rho_
Spin density matrix.
vector< pair< int, int > > outgoing_
the PDG codes for the outgoing particles
virtual void doinitrun()
Initialize this object to the begining of the run phase.
vector< double > maxWeight_
the maximum weight for the decay
ScalarScalarScalarDecayer & operator=(const ScalarScalarScalarDecayer &)=delete
Private and non-existent assignment operator.
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.
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.
virtual void dataBaseOutput(ofstream &os, bool header) const
Output the setup information for the particle database.
vector< int > incoming_
the PDG code for the incoming particle
void persistentInput(PersistentIStream &is, int version)
Function used to read in object persistently.
string setUpDecayMode(string arg)
Set the parameters for a decay mode.
void persistentOutput(PersistentOStream &os) const
Function used to write out object persistently.
-*- C++ -*-
ThePEG::Ptr< InterfacedBase >::pointer IBPtr
vector< tPDPtr > tPDVector
vector< PPtr > ParticleVector
ThePEG::Ptr< ParticleData >::transient_const_pointer tcPDPtr