EIC code displayed by LXR master/​include/​Herwig/​MatrixElement/​General/​MEfv2vf.h	Source navigation Diff markup Identifier search General search
	Version: master test Revert   Change

File indexing completed on 2026-08-06 09:24:08

 // -*- C++ -*-
 //
 // MEfv2vf.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_MEfv2vf_H
 #define HERWIG_MEfv2vf_H
 //
 // This is the declaration of the MEfv2vf class.
 //
 
 #include "GeneralHardME.h"
 #include "Herwig/MatrixElement/ProductionMatrixElement.h"
 #include "ThePEG/Helicity/WaveFunction/VectorWaveFunction.h"
 #include "ThePEG/Helicity/WaveFunction/SpinorWaveFunction.h"
 #include "ThePEG/Helicity/WaveFunction/SpinorBarWaveFunction.h"
 #include "ThePEG/Helicity/Vertex/AbstractFFVVertex.h"
 #include "ThePEG/Helicity/Vertex/AbstractVVVVertex.h"
 #include "ThePEG/Helicity/Vertex/AbstractFFVVVertex.h"
 
 namespace Herwig {
 using namespace ThePEG;
 
 /**
  * This class implements the matrix element for a fermion and a vector
  * boson to a fermion and a vector boson. It inherits from GeneralHardME
  * and implements the appropriate virtual functions. 
  * 
  * @see GeneralHardME
  *
  */
 class MEfv2vf: public GeneralHardME {
 
 public:
 
   /** A vector of SpinorWaveFunctions. */
   typedef vector<Helicity::SpinorWaveFunction> SpinorVector;
 
   /** A vector of SpinorBarWaveFunctions. */
   typedef vector<Helicity::SpinorBarWaveFunction> SpinorBarVector;
 
   /** A vector of VectorWaveFunctions. */
   typedef vector<Helicity::VectorWaveFunction> VBVector;
 
 public:
 
   /** @name Virtual functions required by the MEBase class. */
   //@{
   /**
    * The matrix element for the kinematical configuration
    * previously provided by the last call to setKinematics(), suitably
    * scaled by sHat() to give a dimension-less number.
    * @return the matrix element scaled with sHat() to give a
    * dimensionless number.
    */
   virtual double me2() const;
   //@}
 
   /**
    * Construct the vertex information for the spin correlations
    * @param sub Pointer to the relevent SubProcess
    */
   virtual void constructVertex(tSubProPtr sub);
 
 private:
 
   /** @name Functions to calculate the Helicity MatrixElement.*/
   //@{
   /**
    * Calculate the matrix element for an incoming fermion
    * @param spIn A vector of spinors for the incoming fermion
    * @param vecIn A vector of VectorWaveFunctions for the incoming boson
    * @param spbOut A vector of SpinorBarWaveFunctions for the outgoing fermion
    * @param vecOut A vector of VectorWaveFunctions for the outgoing boson
    * @param mc If the outgoing vector is massless or not
    * @param first Whether or not first call to decide if colour decomposition etc
    * should be calculated
    * @param mesq The matrix element squared
   */
   ProductionMatrixElement
   fv2vfHeME(const SpinorVector & spIn,  const VBVector & vecIn, 
         const VBVector & vecOut, bool mc,
         const SpinorBarVector & spbOut, 
         double & mesq, bool first) const;
 
   /**
    * Calculate the matrix element for an incoming anti-fermion
    * @param spbIn A vector of SpinorBarWaveFunctions for the incoming anti-fermion
    * @param vecIn A vector of VectorWaveFunctions for the incoming boson
    * @param spOut A vector of Spinors for the outgoing antifermion
    * @param vecOut A vector of VectorWaveFunctions for the outgoing boson
    * @param mc If the outgoing vector is massless or not
    * @param first Whether or not first call to decide if colour decomposition etc
    * should be calculated
    * @param mesq The matrix element squared
   */
   ProductionMatrixElement
   fbv2vfbHeME(const SpinorBarVector & spbIn,  const VBVector & vecIn, 
           const VBVector & vecOut, bool mc,
           const SpinorVector & spOut, 
           double & mesq, bool first) const;
   //@}
 
 protected:
   
   /**
    * A debugging function to test the value of me2 against an
    * analytic function.
    * @param me2 The value of the \f$ |\bar{\mathcal{M}}|^2 \f$
    */
   virtual void debug(double me2) const;
 
 public:
 
   /** @name Functions used by the persistent I/O system. */
   //@{
   /**
    * Function used to write out object persistently.
    * @param os the persistent output stream written to.
    */
   void persistentOutput(PersistentOStream & os) const;
 
   /**
    * Function used to read in object persistently.
    * @param is the persistent input stream read from.
    * @param version the version number of the object when written.
    */
   void persistentInput(PersistentIStream & is, int version);
   //@}
 
   /**
    * The standard Init function used to initialize the interfaces.
    * Called exactly once for each class by the class description system
    * before the main function starts or
    * when this class is dynamically loaded.
    */
   static void Init();
 
 
 protected:
 
   /** @name Standard Interfaced functions. */
   //@{
   /**
    * Initialize this object after the setup phase before saving an
    * EventGenerator to disk.
    * @throws InitException if object could not be initialized properly.
    */
   virtual void doinit();
   //@}
 
 protected:
 
   /** @name Clone Methods. */
   //@{
   /**
    * Make a simple clone of this object.
    * @return a pointer to the new object.
    */
   virtual IBPtr clone() const {return new_ptr(*this);}
 
   /** Make a clone of this object, possibly modifying the cloned object
    * to make it sane.
    * @return a pointer to the new object.
    */
   virtual IBPtr fullclone() const {return new_ptr(*this);}
   //@}
 
 private:
 
   /**
    * The assignment operator is private and must never be called.
    * In fact, it should not even be implemented.
    */
   MEfv2vf & operator=(const MEfv2vf &) = delete;
 
 private:
   
   /** @name Store dynamically casted vertices. */
   //@{
   /**
    * A pair off FFVVertex pointers 
    */
   vector<pair<AbstractFFVVertexPtr, AbstractFFVVertexPtr> > fermion_;
 
   /**
    * A pair of FFVVertex, VVVertex pointers 
    */
   vector<pair<AbstractFFVVertexPtr, AbstractVVVVertexPtr> > vector_;
 
   /**
    *  Four point vertices
    */
   vector<AbstractFFVVVertexPtr> four_;
   //@}
 
 };
 
 }
 
 #endif /* HERWIG_MEfv2vf_H */

This page was automatically generated by the 2.3.7 LXR engine. The LXR team