Models/UED/UEDG1G1G0Vertex.h

0001 // -*- C++ -*-
0002 //
0003 // UEDG1G1G0Vertex.h is a part of Herwig - A multi-purpose Monte Carlo event generator
0004 // Copyright (C) 2002-2019 The Herwig Collaboration
0005 //
0006 // Herwig is licenced under version 3 of the GPL, see COPYING for details.
0007 // Please respect the MCnet academic guidelines, see GUIDELINES for details.
0008 //
0009 #ifndef HERWIG_UEDG1G1G0Vertex_H
0010 #define HERWIG_UEDG1G1G0Vertex_H
0011 //
0012 // This is the declaration of the UEDG1G1G0Vertex class.
0013 //
0014
0015 #include "ThePEG/Helicity/Vertex/Vector/VVVVertex.h"
0016 #include "UEDBase.h"
0017
0018 namespace Herwig {
0019 using namespace ThePEG;
0020 using ThePEG::Helicity::Direction;
0021
0022 /**
0023  * This is the implementation of the Feynman rule for the coupling
0024  * of Standard Model gluon to a pair of (level1) KK excited gluons.
0025  *
0026  * @see \ref UEDG1G1G0VertexInterfaces "The interfaces"
0027  * defined for UEDG1G1G0Vertex.
0028  */
0029 class UEDG1G1G0Vertex: public VVVVertex {
0030
0031 public:
0032
0033   /**
0034    * The default constructor.
0035    */
0036   UEDG1G1G0Vertex();
0037
0038   /**
0039    * The standard Init function used to initialize the interfaces.
0040    * Called exactly once for each class by the class description system
0041    * before the main function starts or
0042    * when this class is dynamically loaded.
0043    */
0044   static void Init();
0045
0046   /** Calculate the coupling
0047    *@param q2 The scale at which to evaluate the coupling
0048    *@param part1 The first interacting particle
0049    *@param part2 The second interacting particle
0050    *@param part3 The third interacting particle
0051    */
0052   virtual void setCoupling(Energy2 q2,tcPDPtr part1,
0053                tcPDPtr part2,tcPDPtr part3);
0054
0055 protected:
0056
0057   /** @name Clone Methods. */
0058   //@{
0059   /**
0060    * Make a simple clone of this object.
0061    * @return a pointer to the new object.
0062    */
0063   virtual IBPtr clone() const {return new_ptr(*this);}
0064
0065   /** Make a clone of this object, possibly modifying the cloned object
0066    * to make it sane.
0067    * @return a pointer to the new object.
0068    */
0069   virtual IBPtr fullclone() const {return new_ptr(*this);}
0070   //@}
0071
0072
0073 protected:
0074
0075   /** @name Standard Interfaced functions. */
0076   //@{
0077   /**
0078    * Initialize this object after the setup phase before saving an
0079    * EventGenerator to disk.
0080    * @throws InitException if object could not be initialized properly.
0081    */
0082   virtual void doinit();
0083   //@}
0084
0085 private:
0086
0087   /**
0088    * The assignment operator is private and must never be called.
0089    * In fact, it should not even be implemented.
0090    */
0091   UEDG1G1G0Vertex & operator=(const UEDG1G1G0Vertex &) = delete;
0092
0093 private:
0094
0095   /**
0096    * The scale at which the coupling was last evaluated
0097    */
0098   Energy2 theq2Last;
0099
0100   /**
0101    * The value of the coupling when it was last evaluated
0102    */
0103   Complex theCoupLast;
0104
0105 };
0106 }
0107
0108 #endif /* HERWIG_UEDG1G1G0Vertex_H */