EtaPiPiFermionsDecayer.h

// -*- C++ -*-
//
// EtaPiPiFermionsDecayer.h is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2019 The Herwig Collaboration
//
// Herwig is licenced under version 3 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef HERWIG_EtaPiPiFermionsDecayer_H
#define HERWIG_EtaPiPiFermionsDecayer_H
// This is the declaration of the EtaPiPiFermionsDecayer class.
 
#include "Herwig/Utilities/Kinematics.h"
#include "Herwig/Decay/DecayIntegrator.h"
#include "Herwig/Decay/PhaseSpaceMode.h"
#include "Herwig/Decay/FormFactors/OmnesFunction.fh"
#include "ThePEG/Helicity/LorentzSpinorBar.h"
 
namespace Herwig {
using namespace ThePEG;
 
class EtaPiPiFermionsDecayer: public DecayIntegrator {
 
public:
 
  EtaPiPiFermionsDecayer();
  
  virtual int modeNumber(bool & cc, tcPDPtr parent, 
                         const tPDVector & children) const;
  
  double me2(const int ichan,const Particle & part,
             const tPDVector & outgoing,
             const vector<Lorentz5Momentum> & momenta,
             MEOption meopt) const;
 
  virtual void constructSpinInfo(const Particle & part,
                                 ParticleVector outgoing) const;
 
  virtual void dataBaseOutput(ofstream & os,bool header) const;
 
public:
 
  void persistentOutput(PersistentOStream & os) const;
 
  void persistentInput(PersistentIStream & is, int version);
 
  static void Init();
 
protected:
 
  virtual IBPtr clone() const {return new_ptr(*this);}
 
  virtual IBPtr fullclone() const {return new_ptr(*this);}
  
protected:
  
 
  virtual void doinit();
 
  virtual void doinitrun();
 
public:
 
  string setUpDecayMode(string arg);
 
private:
 
  EtaPiPiFermionsDecayer & operator=(const EtaPiPiFermionsDecayer &) = delete;
 
private:
 
  Energy fPi_;
 
  vector<int> incoming_;
 
  vector<int> lepton_;
 
  vector<double> coupling_;
 
  vector<double> maxWeight_;
 
  vector<int> option_;
 
  InvEnergy2 aConst_;
 
  double cConst_;
 
  Energy mRho_;
 
  Energy rhoWidth_;
 
  double rhoConst_;
 
  Energy mPi_;
 
  bool localParameters_;
 
  OmnesFunctionPtr omnesFunction_;
 
  mutable RhoDMatrix rho_;
 
  mutable vector<Helicity::LorentzSpinor   <SqrtEnergy> > wave_;
 
  mutable vector<Helicity::LorentzSpinorBar<SqrtEnergy> > wavebar_;
};
}
 
#endif /* HERWIG_EtaPiPiFermionsDecayer_H */