Decayer.h

// -*- C++ -*-
//
// Decayer.h is a part of ThePEG - Toolkit for HEP Event Generation
// Copyright (C) 1999-2019 Leif Lonnblad
//
// ThePEG is licenced under version 3 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef ThePEG_Decayer_H
#define ThePEG_Decayer_H
// This is the declaration of the Decayer class.
 
#include "ThePEG/Config/ThePEG.h"
#include "Decayer.fh"
#include "ThePEG/Handlers/HandlerBase.h"
#include "ThePEG/MatrixElement/Amplitude.h"
 
namespace ThePEG {
 
class Decayer: public HandlerBase {
 
public:
 
  virtual bool accept(const DecayMode & dm) const = 0;
 
  virtual bool needsFullStep() const;
 
  virtual ParticleVector decay(const DecayMode & dm,
                               const Particle & p) const = 0;
 
  virtual ParticleVector decay(const DecayMode & dm, const Particle & p,
                               Step & step) const;
 
  virtual double brat(const DecayMode & dm, const ParticleData & pd,
                      double oldbrat) const;
 
  virtual double brat(const DecayMode & dm, const Particle & p,
                      double oldbrat) const;
 
  virtual ParticleVector getChildren(const DecayMode & dm,
                                     const Particle & parent) const;
 
  virtual void finalBoost(const Particle & parent,
                          const ParticleVector & children) const;
 
  virtual void setScales(const Particle & parent,
                         const ParticleVector & children) const;
 
  Ptr<Amplitude>::pointer amplitude() const { return theAmplitude; }
 
  static ParticleVector
  DecayParticle(tPPtr parent, Step & step, long maxtry = 1000);
 
  struct DecayFailure: public Exception {};
 
public:
 
 
  void persistentOutput(PersistentOStream & os) const;
 
  void persistentInput(PersistentIStream & is, int version);
 
  static void Init();
 
private:
 
  static AbstractNoPIOClassDescription<Decayer> initDecayer;
 
  Decayer & operator=(const Decayer &) = delete;
 
  Ptr<Amplitude>::pointer theAmplitude;
 
};
 
template <>
struct BaseClassTrait<Decayer,1>: public ClassTraitsType {
  typedef HandlerBase NthBase;
};
 
template <>
struct ClassTraits<Decayer>: public ClassTraitsBase<Decayer> {
  static string className() { return "ThePEG::Decayer"; }
};
 
}
 
#endif /* ThePEG_Decayer_H */