Models/ADD/ADDModelFFGRVertex.h

0001 // -*- C++ -*-
0002 //
0003 // ADDModelFFGRVertex.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_ADDModelFFGRVertex_H
0010 #define HERWIG_ADDModelFFGRVertex_H
0011 //
0012 // This is the declaration of the ADDModelFFGRVertex class.
0013
0014 #include "ThePEG/Helicity/Vertex/Tensor/FFTVertex.h"
0015 #include "ADDModel.h"
0016
0017 namespace Herwig {
0018 using namespace ThePEG;
0019
0020 /** \ingroup Helicity
0021  *
0022  *  This is the implementation of the Randell-Sundrum model fermion-antifermion
0023  *  tensor vertex for helicity amplitude calculations
0024  *
0025  *  @see FFTVertex
0026  *  @see VertexBase
0027  */
0028 class ADDModelFFGRVertex: public FFTVertex {
0029
0030 public:
0031
0032   /**
0033    * Default constructor.
0034    */
0035   ADDModelFFGRVertex();
0036
0037 public:
0038
0039   /** @name Functions used by the persistent I/O system. */
0040   //@{
0041   /**
0042    * Function used to write out object persistently.
0043    * @param os the persistent output stream written to.
0044    */
0045   void persistentOutput(PersistentOStream & os) const;
0046
0047   /**
0048    * Function used to read in object persistently.
0049    * @param is the persistent input stream read from.
0050    * @param version the version number of the object when written.
0051    */
0052   void persistentInput(PersistentIStream & is, int version);
0053   //@}
0054
0055   /**
0056    * Standard Init function used to initialize the interfaces.
0057    */
0058   static void Init();
0059
0060   /**
0061    * Calculate the couplings.
0062    * @param q2 The scale \f$q^2\f$ for the coupling at the vertex.
0063    * @param part1 The ParticleData pointer for the first  particle.
0064    * @param part2 The ParticleData pointer for the second particle.
0065    * @param part3 The ParticleData pointer for the third  particle.
0066    */
0067   virtual void setCoupling(Energy2 q2,tcPDPtr part1,tcPDPtr part2,tcPDPtr part3);
0068
0069 protected:
0070
0071   /** @name Clone Methods. */
0072   //@{
0073   /**
0074    * Make a simple clone of this object.
0075    * @return a pointer to the new object.
0076    */
0077   virtual IBPtr clone() const {return new_ptr(*this);}
0078
0079   /** Make a clone of this object, possibly modifying the cloned object
0080    * to make it sane.
0081    * @return a pointer to the new object.
0082    */
0083   virtual IBPtr fullclone() const {return new_ptr(*this);}
0084   //@}
0085
0086 protected:
0087
0088   /**
0089    * Initialize this object after the setup phase before saving and
0090    * EventGenerator to disk.
0091    * @throws InitException if object could not be initialized properly.
0092    */
0093   virtual void doinit();
0094
0095   /**
0096    * Calculate the propagator for a diagram.
0097    * @param iopt The option for the Breit-Wigner shape
0098    * @param q2 The scale
0099    * @param part The ParticleData pointer for the off-shell particle.
0100    * @param mass The mass if not to be taken from the ParticleData object
0101    * @param width The width if not to be taken from the ParticleData object
0102    */
0103   virtual Complex propagator(int iopt, Energy2 q2,tcPDPtr part,
0104                  Energy mass=-GeV, Energy width=-GeV);
0105
0106 private:
0107
0108   /**
0109    * Private and non-existent assignment operator.
0110    */
0111   ADDModelFFGRVertex & operator=(const ADDModelFFGRVertex &) = delete;
0112
0113   /**
0114    * The coupling.
0115    */
0116   InvEnergy kappa_;
0117
0118   /**
0119    *  Mass ratio for the propagator
0120    */
0121   Energy r_;
0122
0123 };
0124 }
0125
0126 #endif /* HERWIG_ADDModelFFGRVertex_H */