Models/Susy/SSGSSVertex.h

0001 // -*- C++ -*-
0002 //
0003 // SSGSSVertex.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_SSGSSVertex_H
0010 #define HERWIG_SSGSSVertex_H
0011 //
0012 // This is the declaration of the SSGSSVertex class.
0013 //
0014
0015 #include "ThePEG/Helicity/Vertex/Scalar/VSSVertex.h"
0016 #include "SusyBase.h"
0017
0018 namespace Herwig {
0019 using namespace ThePEG;
0020
0021 /**
0022  * The SSGSSVertex implements the coupling of a gluon to 2 sfermions.
0023  * It inherits from VSSVertex and implements the setCoupling method.
0024  *
0025  * @see VSSVertex
0026  */
0027 class SSGSSVertex: public VSSVertex {
0028
0029 public:
0030
0031   /**
0032    * The default constructor.
0033    */
0034   SSGSSVertex();
0035
0036   /**
0037    * The standard Init function used to initialize the interfaces.
0038    * Called exactly once for each class by the class description system
0039    * before the main function starts or
0040    * when this class is dynamically loaded.
0041    */
0042   static void Init();
0043
0044  /**
0045    * Calculate the couplings.
0046    * @param q2 The scale \f$q^2\f$ for the coupling at the vertex.
0047    * @param part1 The ParticleData pointer for the first  particle.
0048    * @param part2 The ParticleData pointer for the second particle.
0049    * @param part3 The ParticleData pointer for the third  particle.
0050    */
0051   virtual void setCoupling(Energy2 q2,tcPDPtr part1,
0052                            tcPDPtr part2,tcPDPtr part3);
0053
0054 protected:
0055
0056   /** @name Clone Methods. */
0057   //@{
0058   /**
0059    * Make a simple clone of this object.
0060    * @return a pointer to the new object.
0061    */
0062   virtual IBPtr clone() const {return new_ptr(*this);}
0063
0064   /** Make a clone of this object, possibly modifying the cloned object
0065    * to make it sane.
0066    * @return a pointer to the new object.
0067    */
0068   virtual IBPtr fullclone() const {return new_ptr(*this);}
0069   //@}
0070
0071
0072 protected:
0073
0074   /** @name Standard Interfaced functions. */
0075   //@{
0076   /**
0077    * Initialize this object after the setup phase before saving an
0078    * EventGenerator to disk.
0079    * @throws InitException if object could not be initialized properly.
0080    */
0081   virtual void doinit();
0082   //@}
0083
0084 private:
0085
0086   /**
0087    * The assignment operator is private and must never be called.
0088    * In fact, it should not even be implemented.
0089    */
0090   SSGSSVertex & operator=(const SSGSSVertex &) = delete;
0091
0092 private:
0093
0094   /**
0095    * Store the value of the coupling when last evaluated
0096    */
0097   Complex _couplast;
0098
0099   /**
0100    * Store the scale at which coupling was last evaluated
0101    */
0102   Energy2 _q2last;
0103 };
0104 }
0105
0106 #endif /* HERWIG_SSGSSVertex_H */