Models/StandardModel/SMFFWVertex.h

0001 // -*- C++ -*-
0002 //
0003 // SMFFWVertex.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_SMFFWVertex_H
0010 #define HERWIG_SMFFWVertex_H
0011 //
0012 // This is the declaration of the SMFFWVertex class.
0013
0014 #include "ThePEG/Helicity/Vertex/Vector/FFVVertex.h"
0015
0016 namespace Herwig {
0017 using namespace ThePEG;
0018
0019 /** \ingroup Helicity
0020  *
0021  *  This is the implementation of the Standard model coupling
0022  *  of the W to the fermions.
0023  *
0024  *  @see FFVVertex
0025  *  @see VertexBase
0026  */
0027 class SMFFWVertex: public FFVVertex {
0028
0029 public:
0030
0031   /**
0032    * Default constructor.
0033    */
0034   SMFFWVertex();
0035
0036 public:
0037
0038   /** @name Functions used by the persistent I/O system. */
0039   //@{
0040   /**
0041    * Function used to write out object persistently.
0042    * @param os the persistent output stream written to.
0043    */
0044   void persistentOutput(PersistentOStream & os) const;
0045
0046   /**
0047    * Function used to read in object persistently.
0048    * @param is the persistent input stream read from.
0049    * @param version the version number of the object when written.
0050    */
0051   void persistentInput(PersistentIStream & is, int version);
0052   //@}
0053
0054   /**
0055    * Standard Init function used to initialize the interfaces.
0056    */
0057   static void Init();
0058
0059   /**
0060    * Calculate the couplings.
0061    * @param q2 The scale \f$q^2\f$ for the coupling at the vertex.
0062    * @param part1 The ParticleData pointer for the first  particle.
0063    * @param part2 The ParticleData pointer for the second particle.
0064    * @param part3 The ParticleData pointer for the third  particle.
0065    */
0066   virtual void setCoupling(Energy2 q2,tcPDPtr part1,tcPDPtr part2,tcPDPtr part3);
0067
0068 protected:
0069
0070   /** @name Clone Methods. */
0071   //@{
0072   /**
0073    * Make a simple clone of this object.
0074    * @return a pointer to the new object.
0075    */
0076   virtual IBPtr clone() const {return new_ptr(*this);}
0077
0078   /** Make a clone of this object, possibly modifying the cloned object
0079    * to make it sane.
0080    * @return a pointer to the new object.
0081    */
0082   virtual IBPtr fullclone() const {return new_ptr(*this);}
0083   //@}
0084
0085 protected:
0086
0087   /**
0088    * Initialize this object after the setup phase before saving and
0089    * EventGenerator to disk.
0090    * @throws InitException if object could not be initialized properly.
0091    */
0092   virtual void doinit();
0093
0094 private:
0095
0096   /**
0097    * Private and non-existent assignment operator.
0098    */
0099   SMFFWVertex & operator=(const SMFFWVertex &) = delete;
0100
0101 private:
0102
0103   /**
0104    * True, if a diagonal CKM matrix should be assumed. This ignores
0105    * the CKM object of the StandardModel.
0106    */
0107   bool _diagonal;
0108
0109   /**
0110    * Storage of the couplings.
0111    */
0112   //@{
0113   /**
0114    *  The elements of the CKM matrix.
0115    */
0116   vector<vector<Complex> > _ckm;
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_SMFFWVertex_H */