VVSDecayer.h

// -*- C++ -*-
#ifndef THEPEG_VVSDecayer_H
#define THEPEG_VVSDecayer_H
//
// This is the declaration of the VVSDecayer class.
//
 
#include "GeneralTwoBodyDecayer.h"
#include "ThePEG/Helicity/Vertex/Scalar/VVSVertex.h"
#include "ThePEG/Repository/EventGenerator.h"
 
namespace Herwig {
using namespace ThePEG;
using Helicity::VVSVertexPtr;
 
class VVSDecayer: public GeneralTwoBodyDecayer {
 
public:
 
  VVSDecayer() {}
 
  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 Energy partialWidth(PMPair inpart, PMPair outa, 
                              PMPair outb) const;
 
  virtual void setDecayInfo(PDPtr incoming, PDPair outgoing,
                            vector<VertexBasePtr>,
                            map<ShowerInteraction,VertexBasePtr> &,
                            const vector<map<ShowerInteraction,VertexBasePtr> > &,
                            map<ShowerInteraction,VertexBasePtr>);
  
  virtual POWHEGType hasPOWHEGCorrection()  {
    POWHEGType output = FSR;
    for(auto vertex : vertex_) {
      if(vertex->orderInAllCouplings()!=1) {
        output = No;
        break;
      }
    }
    return output;
  }
 
  virtual double threeBodyME(const int , const Particle & inpart,
                             const ParticleVector & decay,
                             ShowerInteraction inter, MEOption meopt);
 
public:
 
  void persistentOutput(PersistentOStream & os) const;
 
  void persistentInput(PersistentIStream & is, int version);
 
  static void Init();
 
protected:
 
  virtual IBPtr clone() const;
 
  virtual IBPtr fullclone() const;
 
private:
 
  VVSDecayer & operator=(const VVSDecayer &) = delete;
 
private:
 
  vector<AbstractVVSVertexPtr> vertex_;
 
  vector<VVSVertexPtr> perturbativeVertex_;
 
  map<ShowerInteraction,AbstractVVVVertexPtr> incomingVertex_;
 
  map<ShowerInteraction,AbstractVVVVertexPtr> outgoingVertexV_;
 
  map<ShowerInteraction,AbstractVSSVertexPtr> outgoingVertexS_;
 
  mutable RhoDMatrix rho_;
 
  mutable vector<Helicity::VectorWaveFunction> vectors_[2];
  
private:
 
  mutable RhoDMatrix rho3_;
 
  mutable vector<Helicity::VectorWaveFunction> vectors3_[2];
 
  mutable vector<Helicity::VectorWaveFunction> gluon_;
};
 
}
 
#endif /* THEPEG_VVSDecayer_H */