Models/Susy/SSCCZVertex.h

0001 // -*- C++ -*-
0002 //
0003 // SSCCZVertex.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_SSCCZVertex_H
0010 #define HERWIG_SSCCZVertex_H
0011 //
0012 // This is the declaration of the SSCCZVertex class.
0013 //
0014
0015 #include "ThePEG/Helicity/Vertex/Vector/FFVVertex.h"
0016 #include "SusyBase.h"
0017
0018 namespace Herwig {
0019 using namespace ThePEG;
0020
0021 /**
0022  * This class implements the coupling of a \f$\gamma/Z^0\f$ to a pair of
0023  * charginos. It inherits from FFVVertex and implements the setCoupling method.
0024  *
0025  * @see \ref SSCCZVertexInterfaces "The interfaces"
0026  * defined for SSCCZVertex.
0027  * @see FFVVertex
0028  */
0029 class SSCCZVertex: public FFVVertex {
0030
0031 public:
0032
0033   /**
0034    * The default constructor.
0035    */
0036   SSCCZVertex();
0037
0038 public:
0039
0040   /** @name Functions used by the persistent I/O system. */
0041   //@{
0042   /**
0043    * Function used to write out object persistently.
0044    * @param os the persistent output stream written to.
0045    */
0046   void persistentOutput(PersistentOStream & os) const;
0047
0048   /**
0049    * Function used to read in object persistently.
0050    * @param is the persistent input stream read from.
0051    * @param version the version number of the object when written.
0052    */
0053   void persistentInput(PersistentIStream & is, int version);
0054   //@}
0055
0056   /**
0057    * The standard Init function used to initialize the interfaces.
0058    * Called exactly once for each class by the class description system
0059    * before the main function starts or
0060    * when this class is dynamically loaded.
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,
0072                            tcPDPtr part2, tcPDPtr part3);
0073
0074 protected:
0075
0076   /** @name Clone Methods. */
0077   //@{
0078   /**
0079    * Make a simple clone of this object.
0080    * @return a pointer to the new object.
0081    */
0082   virtual IBPtr clone() const {return new_ptr(*this);}
0083
0084   /** Make a clone of this object, possibly modifying the cloned object
0085    * to make it sane.
0086    * @return a pointer to the new object.
0087    */
0088   virtual IBPtr fullclone() const {return new_ptr(*this);}
0089   //@}
0090
0091 protected:
0092
0093   /** @name Standard Interfaced functions. */
0094   //@{
0095   /**
0096    * Initialize this object after the setup phase before saving an
0097    * EventGenerator to disk.
0098    * @throws InitException if object could not be initialized properly.
0099    */
0100   virtual void doinit();
0101   //@}
0102
0103 private:
0104
0105   /**
0106    * The assignment operator is private and must never be called.
0107    * In fact, it should not even be implemented.
0108    */
0109   SSCCZVertex & operator=(const SSCCZVertex &) = delete;
0110
0111 private:
0112
0113   /**
0114    * Value of \f$sin^2(\theta_W)\f$
0115    */
0116   double _sw2;
0117
0118   /**
0119    * Value of \f$cos(\theta_W)\f$
0120    */
0121   double _cw;
0122
0123   /**
0124    * The U mixing matrix
0125    */
0126   tMixingMatrixPtr _theU;
0127
0128   /**
0129    * The V mixing matrix
0130    */
0131   tMixingMatrixPtr _theV;
0132
0133   /**
0134    * The value of the coupling when it was last evaluated
0135    */
0136   Complex _couplast;
0137
0138   /**
0139    * The scale at which the coupling was last evaluated
0140    */
0141   Energy2 _q2last;
0142
0143   /**
0144    * The id of the first chargino the last time the vertex was evaluated
0145    */
0146   long _id1last;
0147
0148   /**
0149    * The id of the second chargino the last time the vertex was evaluated
0150    */
0151   long _id2last;
0152
0153   /**
0154    * The value of the left coupling when it was last evaluated
0155    */
0156   Complex _leftlast;
0157
0158   /**
0159    * The value of the right coupling when it was last evaluated
0160    */
0161   Complex _rightlast;
0162
0163   /**
0164    * The ID of the gauge boson when the vertex was last evaluated
0165    */
0166   long _gblast;
0167 };
0168 }
0169
0170 #endif /* HERWIG_SSCCZVertex_H */