Models/Susy/SSWSSVertex.h

0001 // -*- C++ -*-
0002 //
0003 // SSWSSVertex.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_SSWSSVertex_H
0010 #define HERWIG_SSWSSVertex_H
0011 //
0012 // This is the declaration of the SSWSSVertex class.
0013 //
0014
0015 #include "ThePEG/Helicity/Vertex/Scalar/VSSVertex.h"
0016 #include "MSSM.h"
0017
0018 namespace Herwig {
0019 using namespace ThePEG;
0020
0021 /**
0022  * This is the implementation of the coupling of an SM gauge boson to
0023  * a pair of sfermions.
0024  * It inherits from VSSVertex and implements the setCoupling() method.
0025  *
0026  * @see VSSVertex
0027  */
0028 class SSWSSVertex: public VSSVertex {
0029
0030 public:
0031
0032   /**
0033    * The default constructor.
0034    */
0035   SSWSSVertex();
0036
0037 public:
0038
0039   /** @name Functions used by the persistent I/O system. */
0040   //@{
0041   /**
0042    * Function used to write out object persistently.
0043    * @param os the persistent output stream written to.
0044    */
0045   void persistentOutput(PersistentOStream & os) const;
0046
0047   /**
0048    * Function used to read in object persistently.
0049    * @param is the persistent input stream read from.
0050    * @param version the version number of the object when written.
0051    */
0052   void persistentInput(PersistentIStream & is, int version);
0053   //@}
0054
0055   /**
0056    * The standard Init function used to initialize the interfaces.
0057    * Called exactly once for each class by the class description system
0058    * before the main function starts or
0059    * when this class is dynamically loaded.
0060    */
0061   static void Init();
0062
0063  /**
0064   * Calculate the couplings.
0065   * @param q2 The scale \f$q^2\f$ for the coupling at the vertex.
0066   * @param part1 The ParticleData pointer for the first  particle.
0067   * @param part2 The ParticleData pointer for the second particle.
0068   * @param part3 The ParticleData pointer for the third  particle.
0069   */
0070   virtual void setCoupling(Energy2 q2,tcPDPtr part1,
0071                            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 an
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    * The assignment operator is private and must never be called.
0106    * In fact, it should not even be implemented.
0107    */
0108   SSWSSVertex & operator=(const SSWSSVertex &) = delete;
0109
0110   /**
0111    * Value of \f$sin(\theta_w)\f$
0112    */
0113   double _sw;
0114
0115   /**
0116    * Value of \f$cos(\theta_w)\f$
0117    */
0118   double _cw;
0119
0120   /**
0121    * Scale at which the coupling was last evaluated
0122    */
0123   Energy2 _q2last;
0124
0125   /**
0126    * Value of coupling when last evaluated
0127    */
0128   Complex _couplast;
0129
0130   /**
0131    * Stau mixing matrix
0132    */
0133   tMixingMatrixPtr _stau;
0134
0135   /**
0136    * Stop mixing matrix
0137    */
0138   tMixingMatrixPtr _stop;
0139
0140   /**
0141    * Sbottom mixing matrix
0142    */
0143   tMixingMatrixPtr _sbottom;
0144
0145   /**
0146    * The up type sfermion present when the vertex was evaluated.
0147    */
0148   long _ulast;
0149
0150   /**
0151    * The down type sfermion present when the vertex was evaluated.
0152    */
0153   long _dlast;
0154
0155   /**
0156    * The gauge boson present when the vertex was last evaluated.
0157    */
0158   long _gblast;
0159
0160   /**
0161    * The value of the mixing matrix dependent part when the vertex was
0162    * last evaluated
0163    */
0164   Complex _factlast;
0165
0166 };
0167 }
0168
0169 #endif /* HERWIG_SSWSSVertex_H */