Models/StandardModel/SMWWHVertex.h

0001 // -*- C++ -*-
0002 //
0003 // SMWWHVertex.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_SMWWHVertex_H
0010 #define HERWIG_SMWWHVertex_H
0011 //
0012 // This is the declaration of the SMWWHVertex class.
0013 //
0014 #include "ThePEG/Helicity/Vertex/Scalar/VVSVertex.h"
0015 #include "ThePEG/PDT/EnumParticles.h"
0016 #include "Herwig/Models/StandardModel/StandardModel.h"
0017
0018 namespace Herwig {
0019 using namespace ThePEG;
0020
0021 /** \ingroup Helicity
0022  *
0023  *  The SMWWHVertex is the implementation of the
0024  *  coupling of two electroweak gauge bosons to the Higgs in the Standard
0025  *  Model. It inherits from VVSVertex and implements the setCoupling member.
0026  *
0027  *  @see VVSVertex
0028  *  @see VertexBase
0029  */
0030 class SMWWHVertex: public VVSVertex {
0031
0032 public:
0033
0034   /**
0035    * Default constructor.
0036    */
0037   SMWWHVertex();
0038
0039   /**
0040    * Calculate the couplings.
0041    * @param q2 The scale \f$q^2\f$ for the coupling at the vertex.
0042    * @param part1 The ParticleData pointer for the first  particle.
0043    * @param part2 The ParticleData pointer for the second particle.
0044    * @param part3 The ParticleData pointer for the third  particle.
0045    */
0046   virtual void setCoupling(Energy2 q2,tcPDPtr part1,tcPDPtr part2,tcPDPtr part3);
0047
0048 public:
0049
0050   /** @name Functions used by the persistent I/O system. */
0051   //@{
0052   /**
0053    * Function used to write out object persistently.
0054    * @param os the persistent output stream written to.
0055    */
0056   void persistentOutput(PersistentOStream & os) const;
0057
0058   /**
0059    * Function used to read in object persistently.
0060    * @param is the persistent input stream read from.
0061    * @param version the version number of the object when written.
0062    */
0063   void persistentInput(PersistentIStream & is, int version);
0064   //@}
0065
0066   /**
0067    * Standard Init function used to initialize the interfaces.
0068    */
0069   static void Init();
0070
0071 protected:
0072
0073   /** @name Clone Methods. */
0074   //@{
0075   /**
0076    * Make a simple clone of this object.
0077    * @return a pointer to the new object.
0078    */
0079   virtual IBPtr clone() const {return new_ptr(*this);}
0080
0081   /** Make a clone of this object, possibly modifying the cloned object
0082    * to make it sane.
0083    * @return a pointer to the new object.
0084    */
0085   virtual IBPtr fullclone() const {return new_ptr(*this);}
0086   //@}
0087
0088 protected:
0089
0090   /** @name Standard Interfaced functions. */
0091   //@{
0092   /**
0093    * Initialize this object after the setup phase before saving and
0094    * EventGenerator to disk.
0095    * @throws InitException if object could not be initialized properly.
0096    */
0097   virtual void doinit();
0098   //@}
0099
0100 private:
0101
0102   /**
0103    * Private and non-existent assignment operator.
0104    */
0105   SMWWHVertex & operator=(const SMWWHVertex &) = delete;
0106
0107 private:
0108
0109   /**
0110    * Storage of the couplings.
0111    */
0112   //@{
0113   /**
0114    *  The last value of the electroweak coupling calculated.
0115    */
0116   Complex _couplast;
0117
0118   /**
0119    *  The scale \f$q^2\f$ at which the coupling was last evaluated.
0120    */
0121   Energy2 _q2last;
0122
0123   /**
0124    *  The mass of the \f$W\f$ boson.
0125    */
0126   Energy _mw;
0127
0128   /**
0129    *  The factor for the \f$Z\f$ vertex.
0130    */
0131   double _zfact;
0132   //@}
0133 };
0134 }
0135
0136 #endif /* HERWIG_SMWWHVertex_H */