Models/StandardModel/SMFFZVertex.h

0001 // -*- C++ -*-
0002 //
0003 // SMFFZVertex.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_SMFFZVertex_H
0010 #define HERWIG_SMFFZVertex_H
0011 //
0012 // This is the declaration of the SMFFZVertex class.
0013 //
0014 #include "ThePEG/Helicity/Vertex/Vector/FFVVertex.h"
0015 #include "ThePEG/StandardModel/StandardModelBase.h"
0016
0017 namespace Herwig {
0018 using namespace ThePEG;
0019
0020 /** \ingroup Helicity
0021  *
0022  *  This is the implementation of the Standard Model
0023  *  fermion-antifermion Z vertex.
0024  *
0025  *  @see FFVVertex
0026  *  @see VertexBase
0027  */
0028 class SMFFZVertex: public FFVVertex {
0029
0030 public:
0031
0032   /**
0033    * Default constructor.
0034    */
0035   SMFFZVertex();
0036
0037   /**
0038    * Calculate the couplings.
0039    * @param q2 The scale \f$q^2\f$ for the coupling at the vertex.
0040    * @param part1 The ParticleData pointer for the first  particle.
0041    * @param part2 The ParticleData pointer for the second particle.
0042    * @param part3 The ParticleData pointer for the third  particle.
0043    */
0044   virtual void setCoupling(Energy2 q2,tcPDPtr part1,tcPDPtr part2,tcPDPtr part3);
0045
0046 public:
0047
0048   /** @name Functions used by the persistent I/O system. */
0049   //@{
0050   /**
0051    * Function used to write out object persistently.
0052    * @param os the persistent output stream written to.
0053    */
0054   void persistentOutput(PersistentOStream & os) const;
0055
0056   /**
0057    * Function used to read in object persistently.
0058    * @param is the persistent input stream read from.
0059    * @param version the version number of the object when written.
0060    */
0061   void persistentInput(PersistentIStream & is, int version);
0062   //@}
0063
0064   /**
0065    * Standard Init function used to initialize the interfaces.
0066    */
0067   static void Init();
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 private:
0096
0097   /**
0098    * Private and non-existent assignment operator.
0099    */
0100   SMFFZVertex & operator=(const SMFFZVertex &) = delete;
0101
0102 private:
0103
0104   /**
0105    * Storage of the couplings.
0106    */
0107   //@{
0108   /**
0109    *  The left couplings of the Standard Model fermions.
0110    */
0111   vector<double> _gl;
0112
0113   /**
0114    *  The right couplings of the Standard Model fermions.
0115    */
0116   vector<double> _gr;
0117
0118   /**
0119    *  The last value of the electroweak coupling calculated.
0120    */
0121   Complex _couplast;
0122
0123   /**
0124    *  The scale \f$q^2\f$ at which the coupling was last evaluated.
0125    */
0126   Energy2 _q2last;
0127   //@}
0128 };
0129 }
0130
0131 #endif /* HERWIG_SMFFZVertex_H */