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 // -*- C++ -*-
 //
 // SSHPPVertex.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_SSHPPVertex_H
 #define HERWIG_SSHPPVertex_H
 //
 // This is the declaration of the SSHPPVertex class.
 //
 
 #include "Herwig/Models/General/VVSLoopVertex.h"
 #include "MSSM.h"
 
 namespace Herwig {
 
   /**
    * This class implements the effective vertex coupling a higgs
    * to a pair of photons in the MSSM. The loops include third generation
    * sfermions and fermions, \f$W^\pm\f$ and \f$H^\pm\f$
    *
    * @see \ref SSHPPVertexInterfaces "The interfaces"
    * defined for SSHPPVertex.
 
    */
 class SSHPPVertex: public VVSLoopVertex {
   
 public:
   
   /**
    * The default constructor.
    */
   SSHPPVertex();
   
   /** @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 couplings
    *@param q2 Scale at which to evaluate coupling
    *@param particle1 ParticleData pointer to first particle
    *@param particle2 ParticleData pointer to second particle
    *@param particle3 ParticleData pointer to third particle
    */
   virtual void setCoupling(Energy2 q2, tcPDPtr particle1, tcPDPtr particle2,
                tcPDPtr particle3);
   
 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:
   
   /**
    * Initialize this object after the setup phase before saving and
    * EventGenerator to disk.
    * @throws InitException if object could not be initialized properly.
    */
   virtual void doinit();
   
 private:
   
   /**
    * The assignment operator is private and must never be called.
    * In fact, it should not even be implemented.
    */
   SSHPPVertex & operator=(const SSHPPVertex &) = delete;
   
 private:
 
   /**
    * Switch to turn off squark trilinear couplings via A terms for testing
    */
   bool theIncludeTriLinear;
 
   /**
    *  Treat the pseudoscalar as scalar for comparison with ISAJET
    */
   bool thePseudoScalarTreatment;
 
   /**
    * A pointer to the MSSM object
    */
   tMSSMPtr theMSSM;
 
   /**
    * Value of \f$\sin\theta_W\f$
    */
   double theSw;
   
   /**
    * The mass of the \f$W\f$ boson.
    */
   Energy theMw;
 
   /**
    * The factor \f$\frac{M_Z}{\cos\theta_W}\f$ 
    */
   Energy theZfact;  
   
   /**
    * The mixing matrix factor \f$Q^{2i}_{11}Q^{2i}_{11}\f$ 
    * for the \f$\tilde{t}\f$
    */
   Complex theQt1L;
   
   /**
    * The mixing matrix factor \f$Q^{2i}_{12}Q^{2i}_{12}\f$ 
    * for the \f$\tilde{t}\f$
    */
   Complex theQt1R;
   
   /**
    * The mixing matrix factor \f$Q^{2i}_{12}Q^{2i}_{12}\f$ 
    * for the \f$\tilde{t}\f$
    */
   Complex theQt1LR;
 
   /**
    * The mixing matrix factor \f$Q^{2i}_{21}Q^{2i}_{21}\f$ 
    * for the \f$\tilde{t}\f$
    */
   Complex theQt2L;
 
   /**
    * The mixing matrix factor \f$Q^{2i}_{22}Q^{2i}_{22}\f$ 
    * for the \f$\tilde{t}\f$
    */
   Complex theQt2R;
 
   /**
    * The mixing matrix factor \f$Q^{2i}_{22}Q^{2i}_{22}\f$ 
    * for the \f$\tilde{t}\f$
    */
   Complex theQt2LR;
 
  /**
    * The mixing matrix factor \f$Q^{2i-1}_{11}Q^{2i-1}_{11}\f$ 
    * for the \f$\tilde{b}\f$
    */
   Complex theQb1L;
 
  /**
    * The mixing matrix factor \f$Q^{2i-1}_{12}Q^{2i-1}_{12}\f$ 
    * for the \f$\tilde{b}\f$
    */
   Complex theQb1R;
 
  /**
    * The mixing matrix factor \f$Q^{2i-1}_{12}Q^{2i-1}_{12}\f$ 
    * for the \f$\tilde{b}\f$
    */
   Complex theQb1LR;
 
   /**
    * The mixing matrix factor \f$Q^{2i-1}_{21}Q^{2i-1}_{21}\f$ 
    * for the \f$\tilde{b}\f$
    */
   Complex theQb2L;
 
   /**
    * The mixing matrix factor \f$Q^{2i-1}_{22}Q^{2i-1}_{22}\f$ 
    * for the \f$\tilde{b}\f$
    */
   Complex theQb2R; 
 
   /**
    * The mixing matrix factor \f$Q^{2i-1}_{22}Q^{2i-1}_{22}\f$ 
    * for the \f$\tilde{b}\f$
    */
   Complex theQb2LR; 
   
   /**
    * The mixing matrix factor \f$L^{2i}_{11}L^{2i}_{11}\f$ 
    * for the \f$\tilde{\tau}\f$
    */
   Complex theLt1L;
   
   /**
    * The mixing matrix factor \f$L^{2i}_{12}L^{2i}_{12}\f$ 
    * for the \f$\tilde{\tau}\f$
    */
   Complex theLt1R;
   
   /**
    * The mixing matrix factor \f$L^{2i}_{12}L^{2i}_{12}\f$ 
    * for the \f$\tilde{\tau}\f$
    */
   Complex theLt1LR;
 
   /**
    * The mixing matrix factor \f$L^{2i}_{21}L^{2i}_{21}\f$ 
    * for the \f$\tilde{\tau}\f$
    */
   Complex theLt2L;
 
   /**
    * The mixing matrix factor \f$L^{2i}_{22}L^{2i}_{22}\f$ 
    * for the \f$\tilde{\tau}\f$
    */
   Complex theLt2R;
 
   /**
    * The mixing matrix factor \f$L^{2i}_{22}L^{2i}_{22}\f$ 
    * for the \f$\tilde{\tau}\f$
    */
   Complex theLt2LR;
   
   /**
    * A pointer to the top quark ParticleData object 
    */
   tPDPtr thetop;
 
   /**
    * A pointer to the bottom quark ParticleData object 
    */
   tPDPtr thebot;
 
   /**
    * A pointer to the tau lepton ParticleData object 
    */
   tPDPtr thetau;
 
   /**
    * The sfermion masses 
    */
   vector<Energy> theSfmass;
   
   /**
    * The value of \f$ \tan\beta \f$ 
    */
   double theTanB;
 
   /**
    * The value of \f$ \sin\alpha \f$ 
    */
   double theSinA;
 
   /**
    * The value of \f$ \cos\alpha \f$ 
    */
   double theCosA;
 
   /**
    * The value of \f$ \sin\beta \f$ 
    */
   double theSinB;
 
   /**
    * The value of \f$ \cos\beta \f$ 
    */
   double theCosB;
 
   /**
    * The value of \f$ \sin(\alpha + \beta) \f$ 
    */
   double theSinApB;
 
   /**
    * The value of \f$ \cos(\alpha + \beta) \f$ 
    */
   double theCosApB;
 
   /**
    * The value of \f$ \sin(\beta-\alpha) \f$ 
    */
   double theSinBmA;
 
   /**
    * The value of \f$ \cos(\beta-\alpha) \f$ 
    */
   double theCosBmA;
 
   /**
    * The U mixing matrix
    */
   tMixingMatrixPtr theU;
 
   /**
    * The V mixing matrix
    */
   tMixingMatrixPtr theV;  
 
   /**
    * Last value of the coupling calculated
    */
   Complex theCouplast;
   
   /**
    * The scale \f$q^2\f$ at which coupling was last evaluated
    */
   Energy2 theq2last;
   
   /**
    * Whether we have calculated the tensor coefficents yet 
    */
   bool theHaveCoeff;
 
   /**
    *  ID of the higgs
    */
   long theLastID;
 };
 
 }
 
 
 #endif /* HERWIG_SSHPPVertex_H */

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