PseudoScalar2FermionsDecayer.h

// -*- C++ -*-
#ifndef Herwig_PseudoScalar2FermionsDecayer_H
#define Herwig_PseudoScalar2FermionsDecayer_H
//
// This is the declaration of the PseudoScalar2FermionsDecayer class.
//
 
#include "Herwig/Decay/DecayIntegrator.h"
#include "Herwig/Decay/PhaseSpaceMode.h"
#include "ThePEG/Helicity/LorentzSpinorBar.h"
 
namespace Herwig {
 
using namespace ThePEG;
 
class PseudoScalar2FermionsDecayer: public DecayIntegrator {
 
public:
 
  PseudoScalar2FermionsDecayer();
 
  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;
 
  bool twoBodyMEcode(const DecayMode & dm, int & mecode, double & coupling) 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;
 
  virtual IBPtr fullclone() const;
 
protected:
 
  virtual void doinit();
 
  virtual void doinitrun();
 
private:
 
  PseudoScalar2FermionsDecayer & operator=(const PseudoScalar2FermionsDecayer &) = delete;
 
public:
 
  string setUpDecayMode(string arg);
 
private:
 
  vector<double> coupling_;
 
  vector<long> incoming_;
 
  vector<pair<long,long>> outgoing_;
 
  vector<double> maxweight_;
 
  mutable RhoDMatrix rho_;
 
  mutable vector<Helicity::LorentzSpinor   <SqrtEnergy> > wave_;
 
  mutable vector<Helicity::LorentzSpinorBar<SqrtEnergy> > wavebar_;
 
};
 
}
 
#endif /* Herwig_PseudoScalar2FermionsDecayer_H */