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 // -*- C++ -*-
 //
 // SSGNGVertex.h is a part of Herwig - A multi-purpose Monte Carlo event generator
 // Copyright (C) 2002-2019 The Herwig Collaboration
 //
 // Herwig is licenced under version 3 of the GPL, see COPYING for details.
 // Please respect the MCnet academic guidelines, see GUIDELINES for details.
 //
 #ifndef HERWIG_SSGNGVertex_H
 #define HERWIG_SSGNGVertex_H
 //
 // This is the declaration of the SSGNGVertex class.
 //
 
 #include "ThePEG/Helicity/Vertex/Vector/GeneralFFVVertex.h"
 #include "Herwig/Models/Susy/MSSM.h"
 #include "Herwig/Models/Susy/MixingMatrix.fh"
 
 namespace Herwig {
 using namespace ThePEG;
 
 /**
  * This class implements the coupling of a gluon to a gluino and a neutralino
  * via loop diagrams
  * It inherits from GeneralFFVertex and implements the setCoupling method.
  *
  * @see \ref SSGNGVertexInterfaces "The interfaces"
  * defined for SSGNGVertex.
  * @see FFVertex
  */
 class SSGNGVertex: public GeneralFFVVertex {
 
 public:
 
   /**
    * The default constructor.
    */
   SSGNGVertex();
 
 public:
 
   /** @name Functions used by the persistent I/O system. */
   //@{
   /**
    * Function used to write out object persistently.
    * @param os the persistent output stream written to.
    */
   void persistentOutput(PersistentOStream & os) const;
 
   /**
    * Function used to read in object persistently.
    * @param is the persistent input stream read from.
    * @param version the version number of the object when written.
    */
   void persistentInput(PersistentIStream & is, int version);
   //@}
 
   /**
    * The standard Init function used to initialize the interfaces.
    * Called exactly once for each class by the class description system
    * before the main function starts or
    * when this class is dynamically loaded.
    */
   static void Init();
 
   /**
    * Calculate the couplings.
    * @param q2 The scale \f$q^2\f$ for the coupling at the vertex.
    * @param part1 The ParticleData pointer for the first  particle.
    * @param part2 The ParticleData pointer for the second particle.
    * @param part3 The ParticleData pointer for the third  particle.
    */
   virtual void setCoupling(Energy2 q2, tcPDPtr part1,
                            tcPDPtr part2, tcPDPtr part3);
 
 protected:
 
   /** @name Clone Methods. */
   //@{
   /**
    * Make a simple clone of this object.
    * @return a pointer to the new object.
    */
   virtual IBPtr clone() const {return new_ptr(*this);}
 
   /** Make a clone of this object, possibly modifying the cloned object
    * to make it sane.
    * @return a pointer to the new object.
    */
   virtual IBPtr fullclone() const {return new_ptr(*this);}
   //@}
 
 protected:
 
   /**
    *  Evaluate the loop integrals
    */
   void loopIntegrals(Energy Mi, Energy Mj, Energy M, Energy m,
              complex<InvEnergy2> & I, complex<InvEnergy2> & J,
              complex<InvEnergy2> & K, complex<InvEnergy2> & I2);
 
 protected:
 
   /** @name Standard Interfaced functions. */
   //@{
   /**
    * Initialize this object after the setup phase before saving an
    * EventGenerator to disk.
    * @throws InitException if object could not be initialized properly.
    */
   virtual void doinit();
 
   /**
    * Initialize this object. Called in the run phase just before
    * a run begins.
    */
   virtual void doinitrun();
 
   /**
    * Finalize this object. Called in the run phase just after a
    * run has ended. Used eg. to write out statistics.
    */
   virtual void dofinish();
   //@}
 
 private:
 
   /**
    * The assignment operator is private and must never be called.
    * In fact, it should not even be implemented.
    */
   SSGNGVertex & operator=(const SSGNGVertex &) = delete;
 
 private:
 
   /**
    *  Whether of not to include on-shell intermediate states
    */
   bool _includeOnShell;
 
   /**
    *  Only include the real part of the integral
    */
   bool _realIntegral;
 
   /**
    *  Option to omit light quark yukawas 
    */
   bool _omitLightQuarkYukawas;
 
   /**
    * Pointer to the stop mixing matrix
    */
   tMixingMatrixPtr _stop;
 
   /**
    * Pointer to the sbottom mixing matrix
    */
   tMixingMatrixPtr _sbot;
 
   /**
    * The value of \f$sin(\theta_W)\f$
    */
   double _sw;
   
   /**
    * The value of \f$cos(\theta_W)\f$
    */
   double _cw;
   
   /**
    * Mass of the W
    */
   Energy _mw;
 
   /**
    * \f$\sin(\beta)\f$
    */
   double _sb;
   
   /**
    * \f$\cos(\beta)\f$
    */
   double _cb;
 
   /**
    * Store the neutralino mixing matrix
    */
   tMixingMatrixPtr _theN;
 
   /**
    * Store the id of the neutralino when the coupling was last evaluated
    */
   long _idlast;
 
   /**
    * Store the value at which the coupling when it was last evaluated
    */
   Energy2 _q2last;
 
   /**
    * Store the value of the coupling when it was last evaluated
    */
   Complex _couplast;
 
   /**
    * Store the value of the left-coupling when it was last evaluated
    */
   complex<InvEnergy> _leftlast;
 
   /**
    * Store the value of the right-coupling when it was last evaluated
    */
   complex<InvEnergy> _rightlast;
 
   /**
    *  Whether or not initialised
    */
   bool _initLoops;
 };
 }
 
 #endif /* HERWIG_SSGNGVertex_H */

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