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

File indexing completed on 2026-08-06 09:24:17

 // -*- C++ -*-
 //
 // ResonantProcessConstructor.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_ResonantProcessConstructor_H
 #define HERWIG_ResonantProcessConstructor_H
 //
 // This is the declaration of the ResonantProcessConstructor class.
 //
 
 #include "HardProcessConstructor.h"
 #include "ThePEG/Utilities/Exception.h"
 #include "ResonantProcessConstructor.fh"
 
 namespace Herwig {
 using namespace ThePEG;
 
 /**
  * This class is designed to construct the diagrams for resonant processes
  * using a provdided set of particles as interemdiates.
  *
  * @see \ref ResonantProcessConstructorInterfaces "The interfaces"
  * defined for ResonantProcessConstructor.
  * @see HardProcessConstructor
  */
 class ResonantProcessConstructor: public HardProcessConstructor {
 
 public:
 
   /** Set of ParticleData pointers */
   typedef set<tPDPtr> tPDSet;
 
   /** Nested vector of doubles. */
   typedef vector<vector<double> > CFMatrix;
 
   /** Enumeration for the direction */
   enum direction {incoming, outgoing};
 
 public:
 
   /**
    * The default constructor.
    */
   ResonantProcessConstructor() :
     processOption_(0), scaleChoice_(1), scaleFactor_(1.),
     incoming_(0), intermediates_(0),
     outgoing_(0), diagrams_(0)
   {}
 
 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();
 
   /**
    * The main function to create the resonant diagrams
    */
   void constructDiagrams() ;
 
 protected:
 
   /** @name Clone Methods. */
   //@{
   /**
    * Make a simple clone of this object.
    * @return a pointer to the new object.
    */
   virtual IBPtr clone() const;
 
   /** 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;
   //@}
 
 protected:
 
   /** @name Standard HardProcessConstructor 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();
   //@}
 
 private:
 
   /**
    * Utility function to help second vertex
    */
   void constructVertex2(IDPair in, VertexBasePtr vertex, 
             PDPtr partc);
   
   /**
    * Function to create the appropriate diagrams
    */
   void makeResonantDiagram(IDPair in, PDPtr offshell, long outa, 
                long outb, VBPair vertices);
   
   /**
    * Given a vertex and 2 particle id's find the possible states
    * that can be the 3rd external particle
    * @param vertex Pointer to the vertex
    * @param part1 id of first particle
    * @param d1 direction of particle one
    * @param part2 id of other particle
    * @param d2 direction of particle two
    * @param d3 required direction of 3rd state (default = outgoing)
    * @return container of third particles
    */
   tPDSet search(VertexBasePtr vertex, long part1, direction d1, 
            long part2, direction d2, direction d3 = outgoing);
 
   /** 
    * Return the pair of outgoing particles from the list
    */
   IDPair find(long part, const PDVector & out) const;
 
   /**
    * Create a matrix element from the given resonant process diagram
    */
   void createMatrixElement(const HPDiagram & diag) const;
 
   /**
    * Create the correct classname and objectname for a matrix element 
    */
   string MEClassname(const tcPDVector & extpart, tcPDPtr inter,
              string & objname) const;
 
 private:
 
   /**
    * The assignment operator is private and must never be called.
    * In fact, it should not even be implemented.
    */
   ResonantProcessConstructor & operator=(const ResonantProcessConstructor &) = delete;
 
 private:
 
   /**
    * Which types of processes to generate
    */
   unsigned int processOption_;
 
   /**
    *  Scale choice
    */
   unsigned int scaleChoice_;
 
   /**
    *  Prefactor for the scale calculation
    */
   double scaleFactor_;
   
   /**
    * Storage for the required intermediate particles
    */
   vector<PDPtr> incoming_;
 
   /**
    * Storage for the required intermediate particles
    */
   vector<PDPtr> intermediates_;
 
   /**
    * Storage for the required intermediate particles
    */
   vector<PDPtr> outgoing_; 
 
   /**
    * Storage for the diagrams
    */
   vector<HPDiagram> diagrams_;
 
 };
 
   /** Exception class indicating setup problem. */
   class RPConstructorError : public Exception {};
 
 }
 
 
 #endif /* HERWIG_ResonantProcessConstructor_H */

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