FFSVertex.h

// -*- C++ -*-
//
// FFSVertex.h is a part of ThePEG - Toolkit for HEP Event Generation
// Copyright (C) 2003-2019 Peter Richardson, 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_FFSVertex_H
#define ThePEG_FFSVertex_H
//
// This is the declaration of the FFSVertex class.

#include "ThePEG/Helicity/Vertex/AbstractFFSVertex.h"
#include "ThePEG/Helicity/WaveFunction/ScalarWaveFunction.h"
#include "ThePEG/Helicity/WaveFunction/SpinorWaveFunction.h"
#include "ThePEG/Helicity/WaveFunction/SpinorBarWaveFunction.h"
#include "FFSVertex.fh"

namespace ThePEG {

namespace Helicity{

class FFSVertex: public AbstractFFSVertex {
      
public:
  
  static void Init();
  
public:      

  Complex evaluate(Energy2 q2,const SpinorWaveFunction & sp1,
                   const SpinorBarWaveFunction & sbar2,
                   const ScalarWaveFunction & sca3);

  SpinorWaveFunction evaluate(Energy2 q2,int iopt,tcPDPtr out,
                              const SpinorWaveFunction & sp1, 
                              const ScalarWaveFunction & sca3,
                              complex<Energy> mass=-GeV, complex<Energy> width=-GeV);

  SpinorBarWaveFunction evaluate(Energy2 q2,int iopt,tcPDPtr out,
                                 const SpinorBarWaveFunction & sbar2,
                                 const ScalarWaveFunction & sca3,
                                 complex<Energy> mass=-GeV, complex<Energy> width=-GeV);

  ScalarWaveFunction evaluate(Energy2 q2,int iopt,tcPDPtr out,
                              const SpinorWaveFunction & sp1, 
                              const SpinorBarWaveFunction & sbar2,
                              complex<Energy> mass=-GeV, complex<Energy> width=-GeV);

  virtual void setCoupling(Energy2 q2,tcPDPtr part1,
                           tcPDPtr part2,tcPDPtr part3)=0;

  virtual void setCoupling(Energy2,tcPDPtr,tcPDPtr,tcPDPtr,tcPDPtr) {
    assert(false);
  }

  Complex left() { return _left; }
  
  Complex right() { return _right; }
  
protected:

  void left(Complex in) { _left = in; }

  void right(Complex in) { _right = in; }
  
private:
  
  FFSVertex & operator=(const FFSVertex &) = delete;
  
private:

  Complex _left;

  Complex _right;

};
}

}
#endif /* ThePEG_FFSVertex_H */