Models/Leptoquarks/LeptoquarkModelSLQSLQGVertex.h

0001 // -*- C++ -*-
0002 //
0003 // LeptoquarkModelSLQSLQGVertex.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_LeptoquarkModelSLQSLQGVertex_H
0010 #define HERWIG_LeptoquarkModelSLQSLQGVertex_H
0011 //
0012 // This is the declaration of the LeptoquarkModelSLQSLQGVertex class.
0013
0014 #include "ThePEG/Helicity/Vertex/Scalar/VSSVertex.h"
0015 #include "Herwig/Models/Leptoquarks/LeptoquarkModel.h"
0016
0017 namespace Herwig {
0018 using namespace ThePEG;
0019
0020 /** \ingroup Helicity
0021  *
0022  *  The LeptoquarkModelSLQSLQGVertex class is the implementation of the gluon
0023  *  coupling to pairs of scalar leptoquarks in the LeptoquarkModel. It inherits from the VSSVertex
0024  *  and implements the setCoupling member
0025  *
0026  *  @see VSSVertex
0027  *  @see VertexBase
0028  */
0029 class LeptoquarkModelSLQSLQGVertex: public VSSVertex {
0030
0031 public:
0032
0033   /**
0034    * Default constructor.
0035    */
0036   LeptoquarkModelSLQSLQGVertex();
0037
0038   /**
0039    * Standard Init function used to initialize the interfaces.
0040    */
0041   static void Init();
0042
0043   /**
0044    * Calculate the couplings.
0045    * @param q2 The scale \f$q^2\f$ for the coupling at the vertex.
0046    * @param part1 The ParticleData pointer for the first  particle.
0047    * @param part2 The ParticleData pointer for the second particle.
0048    * @param part3 The ParticleData pointer for the third  particle.
0049    */
0050   virtual void setCoupling(Energy2 q2,tcPDPtr part1,tcPDPtr part2,tcPDPtr part3);
0051
0052 protected:
0053
0054   /** @name Clone Methods. */
0055   //@{
0056   /**
0057    * Make a simple clone of this object.
0058    * @return a pointer to the new object.
0059    */
0060   virtual IBPtr clone() const {return new_ptr(*this);}
0061
0062   /** Make a clone of this object, possibly modifying the cloned object
0063    * to make it sane.
0064    * @return a pointer to the new object.
0065    */
0066   virtual IBPtr fullclone() const {return new_ptr(*this);}
0067   //@}
0068
0069 protected:
0070
0071   /**
0072    * Initialize this object after the setup phase before saving and
0073    * EventGenerator to disk.
0074    * @throws InitException if object could not be initialized properly.
0075    */
0076   virtual void doinit();
0077
0078 private:
0079
0080   /**
0081    * Private and non-existent assignment operator.
0082    */
0083   LeptoquarkModelSLQSLQGVertex & operator=(const LeptoquarkModelSLQSLQGVertex &) = delete;
0084
0085   /**
0086    * The energy at which the coupling was last evaluated
0087    */
0088   Energy2 q2last_;
0089
0090   /**
0091    * The coupling when it was last evaluated
0092    */
0093   Complex couplast_;
0094
0095 };
0096
0097 }
0098
0099 #endif /* HERWIG_LeptoquarkModelSLQSLQGVertex_H */