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 // -*- C++ -*-
 #ifndef HERWIG_NMSSMPPHVertex_H
 #define HERWIG_NMSSMPPHVertex_H
 //
 // This is the declaration of the NMSSMPPHVertex class.
 //
 
 #include "Herwig/Models/General/VVSLoopVertex.h"
 #include "Herwig/Models/StandardModel/StandardModel.fh"
 #include "Herwig/Models/Susy/MixingMatrix.h"
 
 namespace Herwig {
 using namespace ThePEG;
 
 /**
  * This class implements the effective vertex for a higgs coupling
  * to a pair of photons in the NMSSM.
  *
  * @see \ref NMSSMPPHVertexInterfaces "The interfaces"
  * defined for NMSSMPPHVertex.
  */
 class NMSSMPPHVertex: public VVSLoopVertex {
 
 public:
 
   /** @name Standard constructors and destructors. */
   //@{
   /**
    * The default constructor.
    */
   NMSSMPPHVertex();
   //@}
 
 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 couplings
    *@param q2 Scale at which to evaluate coupling
    *@param p1 ParticleData pointer to first particle
    *@param p2 ParticleData pointer to second particle
    *@param p3 ParticleData pointer to third particle
    */
   virtual void setCoupling(Energy2 q2, tcPDPtr p1, tcPDPtr p2,
                tcPDPtr p3);
 
 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:
 
   /** @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();
   //@}
 
 private:
 
   /**
    * The assignment operator is private and must never be called.
    * In fact, it should not even be implemented.
    */
   NMSSMPPHVertex & operator=(const NMSSMPPHVertex &) = delete;
 
 private:
 
   /** @name Stored parameters. */
   //@{
   /**
    * The SM pointer 
    */
   tcHwSMPtr _theSM;
   
   /**
    * \f$ \sin\theta_W\f$ 
    */
   double _sw;
 
   /**
    * \f$ \cos\theta_W\f$ 
    */
   double _cw;
 
   /**
    * \f$ M_W\f$
    */
   Energy _mw;
 
   /**
    * \f$ M_Z \f$
    */
   Energy _mz;
   
    /**
    * The product \f$\lambda \langle S\rangle \f$.
    */
   
   Energy _lambdaVEV;
   
   /**
    *  The coefficient of the trilinear \f$SH_2 H_1\f$ term in the superpotential
    */
   
   double _lambda;
   
   /**
    * The value of the VEV of the higgs that couples to the up-type sector
    *  \f$ g*sqrt(2)M_W\cos\beta \f$
    */
   
   Energy _v1;
 
   /**
    * The value of the VEV of the higgs that couples to the down-type sector
    *  \f$ g*sqrt(2)M_W\cos\beta \f$
    */ 
   Energy _v2;
   
   /**
    * The top quark trilinear coupling
    */
   complex<Energy> _triTp;
 
   /**
    * The bottom quark trilinear coupling
    */
   complex<Energy> _triBt;
 
   /**
    * The tau quark trilinear coupling
    */
   complex<Energy> _triTa;
   
   /**
    * A pointer to the top quark
    */
   tcPDPtr _top;
 
   /**
    * A pointer to the bottom quark
    */
   tcPDPtr _bt;
 
   /**
    * A pointer to the tau lepton
    */
   tcPDPtr _tau;
   
   /**
    * CP-even Higgs mixing matrix 
    */
   MixingMatrixPtr _mixS;
   
   /**
    * CP-even Higgs mixing matrix 
    */
   MixingMatrixPtr _mixP;
   
   /**
    * \f$\tilde{t}\f$ mixing matrix  
    */
   MixingMatrixPtr _mixQt;
   
   /**
    * \f$\tilde{b}\f$ mixing matrix  
    */
   MixingMatrixPtr _mixQb;
   
   /**
    * \f$\tilde{\tau}\f$ mixing matrix  
    */
   MixingMatrixPtr _mixLt;
 
   /**
    * \f$ \sin\beta\f$ 
    */
   double _sb;
 
   /**
    * \f$ \cos\beta\f$ 
    */
   double _cb;
 
   /**
    *  The coefficient of the cubic singlet term in the superpotential
    */
   double _kappa;
 
   /**
    * The value of the VEV of the higgs that couples to the down-type sector
    *  \f$ g*sqrt(2)M_W\cos\beta \f$
    */
   Energy _vu;
 
   /**
    * The value of the VEV of the higgs that couples to the up-type sector
    * i.e. \f$ g*sqrt(2)M_W\sin\beta \f$
    */
   Energy _vd;
   
     /**
    * The value of the VEV of the singlet higgs
    */
   Energy _s;
   
   /**
    * The soft trilinear \f$SH_2 H_1\f$ coupling
    */
   Energy _theAl;
 
   /**
    * The U mixing matrix
    */
   tMixingMatrixPtr _mixU;
 
   /**
    * The V mixing matrix
    */
   tMixingMatrixPtr _mixV;
   
   /**
    * The top and bottom quark masses calculated at the last value
    * of \f$q^2\f$ 
    */
   pair<Energy, Energy> _masslast;
 
   /**
    * The scale at which the coupling was last evaluated 
    */
   Energy2 _q2last;
 
   /**
    * The value of the overall normalisation when the coupling was last 
    * evaluated.
    */
   double _couplast;
 
   /**
    * The value of the weak coupling was last 
    * evaluated.
    */
   double _coup;
   
   /**
    * The PDG code of the Higgs particle when the vertex was last evaluated 
    */
   long _hlast;
 
   /**
    * Whether the tensor coefficient need recalculating or not 
    */
   bool _recalc;
   //@}
 };
   
 }
 
 #endif /* HERWIG_NMSSMPPHVertex_H */

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