Models/StandardModel/SMWWWVertex.h

0001 // -*- C++ -*-
0002 //
0003 // SMWWWVertex.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_SMWWWVertex_H
0010 #define HERWIG_SMWWWVertex_H
0011 //
0012 // This is the declaration of the SMWWWVertex class.
0013 //
0014 #include "ThePEG/Helicity/Vertex/Vector/VVVVertex.h"
0015 #include "ThePEG/StandardModel/StandardModelBase.h"
0016
0017 namespace Herwig {
0018 using namespace ThePEG;
0019 using ThePEG::Helicity::Direction;
0020
0021 /** \ingroup Helicity
0022  *
0023  * This is the implementation fo the vertex for the coupling of three
0024  * standard Model electroweak bosons.
0025  *
0026  * @see VVVVertex
0027  * @see VertexBase
0028  */
0029 class SMWWWVertex: public Helicity::VVVVertex {
0030
0031 public:
0032
0033   /** @name Standard constructors and destructors. */
0034   //@{
0035   /**
0036    * Default constructor.
0037    */
0038   SMWWWVertex();
0039   //@}
0040
0041 public:
0042
0043   /** @name Functions used by the persistent I/O system. */
0044   //@{
0045   /**
0046    * Function used to write out object persistently.
0047    * @param os the persistent output stream written to.
0048    */
0049   void persistentOutput(PersistentOStream & os) const;
0050
0051   /**
0052    * Function used to read in object persistently.
0053    * @param is the persistent input stream read from.
0054    * @param version the version number of the object when written.
0055    */
0056   void persistentInput(PersistentIStream & is, int version);
0057   //@}
0058
0059   /**
0060    * Standard Init function used to initialize the interfaces.
0061    */
0062   static void Init();
0063
0064   /**
0065    * Calculate the couplings.
0066    * @param q2 The scale \f$q^2\f$ for the coupling at the vertex.
0067    * @param part1 The ParticleData pointer for the first  particle.
0068    * @param part2 The ParticleData pointer for the second particle.
0069    * @param part3 The ParticleData pointer for the third  particle.
0070    */
0071   virtual void setCoupling(Energy2 q2,tcPDPtr part1,tcPDPtr part2,tcPDPtr part3);
0072
0073 protected:
0074
0075   /** @name Clone Methods. */
0076   //@{
0077   /**
0078    * Make a simple clone of this object.
0079    * @return a pointer to the new object.
0080    */
0081   virtual IBPtr clone() const {return new_ptr(*this);}
0082
0083   /** Make a clone of this object, possibly modifying the cloned object
0084    * to make it sane.
0085    * @return a pointer to the new object.
0086    */
0087   virtual IBPtr fullclone() const {return new_ptr(*this);}
0088   //@}
0089
0090 protected:
0091
0092   /** @name Standard Interfaced functions. */
0093   //@{
0094   /**
0095    * Initialize this object after the setup phase before saving and
0096    * EventGenerator to disk.
0097    * @throws InitException if object could not be initialized properly.
0098    */
0099   virtual void doinit();
0100   //@}
0101
0102 private:
0103
0104   /**
0105    * Private and non-existent assignment operator.
0106    */
0107   SMWWWVertex & operator=(const SMWWWVertex &) = delete;
0108
0109 private:
0110   /**
0111    * Storage of the couplings.
0112    */
0113   //@{
0114   /**
0115    *  The factor for the \f$Z\f$ vertex.
0116    */
0117   double _zfact;
0118
0119   /**
0120    *  The last value of the electroweak coupling calculated.
0121    */
0122   Complex _couplast;
0123
0124   /**
0125    *  The scale \f$q^2\f$ at which the coupling was last evaluated.
0126    */
0127   Energy2 _q2last;
0128   //@}
0129
0130 };
0131 }
0132
0133 #endif /* HERWIG_SMWWWVertex_H */