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 // -*- C++ -*-
 #ifndef HERWIG_ChengHeavyBaryonFormFactor_H
 #define HERWIG_ChengHeavyBaryonFormFactor_H
 //
 // This is the declaration of the ChengHeavyBaryonFormFactor class.
 //
 
 #include "BaryonFormFactor.h"
 #include "ThePEG/PDT/ParticleData.h"
 
 namespace Herwig {
 using namespace ThePEG;
 
   /** \ingroup Decay
    *
    *  The ChengHeavyBaryonFormFactor class implements the form-factors
    *  from PRD53, 1457 and PRD56, 2799 for the semi-leptonic decay of bottom
    *  and charm hadrons. It is also intended for use with the results in PRD56, 2799
    *  for non-leptonic decays using the factorization approximation.
    *
    * @see BaryonFormFactor
    */
 
 class ChengHeavyBaryonFormFactor: public BaryonFormFactor {
 
 public:
 
   /**
    * Default constructor
    */
   ChengHeavyBaryonFormFactor();
 
   /** @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);
   //@}
 
   /**
    * Standard Init function used to initialize the interfaces.
    */
   static void Init();
 
 public:
 
   /** @name Form Factors */
   //@{
   /**
    * The form factor for the weak decay of a spin \f$\frac12\f$ baryon to a 
    * spin \f$\frac12\f$ baryon.  
    * @param q2 The scale \f$q^2\f$.
    * @param iloc The location in the form factor list.
    * @param id0 The PDG code of the incoming baryon.
    * @param id1 The PDG code of the outgoing baryon.
    * @param m0 The mass of the incoming baryon.
    * @param m1 The mass of the outgoing baryon.
    * @param f1v The form factor \f$F^V_1\f$.
    * @param f2v The form factor \f$F^V_2\f$.
    * @param f3v The form factor \f$F^V_3\f$.
    * @param f1a The form factor \f$F^A_1\f$.
    * @param f2a The form factor \f$F^A_2\f$.
    * @param f3a The form factor \f$F^A_3\f$.
    * @param virt Whether the q2 is space or timelike
    */
   virtual void SpinHalfSpinHalfFormFactor(Energy2 q2,int iloc, int id0, int id1,
                       Energy m0, Energy m1,
                       Complex & f1v,Complex & f2v,Complex & f3v,
                       Complex & f1a,Complex & f2a,Complex & f3a,
                       FlavourInfo flavour,
                       Virtuality virt=SpaceLike);
 
   /**
    * The form factor for the weak decay of a spin \f$\frac12\f$ baryon to a 
    * spin \f$\frac32\f$ baryon.
    * @param q2 The scale \f$q^2\f$.
    * @param iloc The location in the form factor list.
    * @param id0 The PDG code of the incoming baryon.
    * @param id1 The PDG code of the outgoing baryon.
    * @param m0 The mass of the incoming baryon.
    * @param m1 The mass of the outgoing baryon.
    * @param g1v The form factor \f$G^V_1\f$.
    * @param g2v The form factor \f$G^V_2\f$.
    * @param g3v The form factor \f$G^V_3\f$.
    * @param g4v The form factor \f$G^V_4\f$.
    * @param g1a The form factor \f$G^A_1\f$.
    * @param g2a The form factor \f$G^A_2\f$.
    * @param g3a The form factor \f$G^A_3\f$.
    * @param g4a The form factor \f$G^A_4\f$.
    * @param virt Whether the q2 is space or timelike
    */
   virtual void SpinHalfSpinThreeHalfFormFactor(Energy2 q2,int iloc, int id0, int id1,
                            Energy m0, Energy m1,
                            Complex & g1v,Complex & g2v,Complex & g3v,
                            Complex & g4v,Complex & g1a,Complex & g2a,
                            Complex & g3a,Complex & g4a,
                            FlavourInfo flavour,
                            Virtuality virt=SpaceLike);
   //@}
 
   /**
    * Output the setup information for the particle database
    * @param os The stream to output the information to
    * @param header Whether or not to output the information for MySQL
    * @param create Whether or not to add a statement creating the object
    */
   virtual void dataBaseOutput(ofstream & os,bool header,bool create) const;
 
 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 and
    * EventGenerator to disk.
    * @throws InitException if object could not be initialized properly.
    */
   virtual void doinit();
   //@}
 
 private:
 
   /**
    * Private and non-existent assignment operator.
    */
   ChengHeavyBaryonFormFactor & operator=(const ChengHeavyBaryonFormFactor &) = delete;
 
 private:
 
   /** @name The quark masses. */
   //@{
   /**
    *  The mass of the up quark.
    */
   Energy _mu;
 
   /**
    *  The mass of the down quark.
    */
   Energy _md;
 
   /**
    *  The mass of the strange quark.
    */
   Energy _ms;
 
   /**
    *  The mass of the charm quark.
    */
   Energy _mc;
 
   /**
    *  The mass of the bottom quark.
    */
   Energy _mb;
   //@}
 
   /**
    *  The normalization parameter \f$N_{fi}\f$ is the flavour and spin overlap
    *  from PRD56, 2799.
    */
   vector<double> _Nfi;
 
   /**
    * The ratio of the flavour and spin overlap for the outgoing over incoming
    * baryon, \f$\eta\f$ from PRD56, 2799.
    */
   vector<double> _eta;
 
   /**
    *  the form factor \f$f_1\f$ evaluated at the maximum value of \f$q^2\f$.
    */
   vector<double> _f1;
 
   /**
    *  the form factor \f$f_2\f$ evaluated at the maximum value of \f$q^2\f$.
    */
   vector<double> _f2;
 
   /**
    *  the form factor \f$f_3\f$ evaluated at the maximum value of \f$q^2\f$.
    */
   vector<double> _f3;
 
   /**
    *  the form factor \f$g_1\f$ evaluated at the maximum value of \f$q^2\f$.
    */
   vector<double> _g1;
 
   /**
    *  the form factor \f$g_2\f$ evaluated at the maximum value of \f$q^2\f$.
    */
   vector<double> _g2;
 
   /**
    *  the form factor \f$g_3\f$ evaluated at the maximum value of \f$q^2\f$.
    */
   vector<double> _g3;
 
   /**
    *  The pole mass for the vector form factors for the \f$b\to c\f$ transitiion.
    */
   Energy _mVbc;
 
   /**
    *  The pole mass for the vector form factors for the \f$b\to s\f$ transitiion.
    */
   Energy _mVbs;
 
   /**
    *  The pole mass for the vector form factors for the \f$c\to s\f$ transitiion.
    */
   Energy _mVcs;
 
   /**
    *  The pole mass for the vector form factors for the \f$b\to d\f$ transitiion.
    */
   Energy _mVbd;
 
   /**
    *  The pole mass for the vector form factors for the \f$c\to u\f$ transitiion.
    */
   Energy _mVcu;
 
   /**
    *  The pole mass for the axial-vector form factors for the \f$b\to c\f$ transitiion.
    */
   Energy _mAbc;
 
   /**
    *  The pole mass for the axial-vector form factors for the \f$b\to s\f$ transitiion.
    */
   Energy _mAbs;
 
   /**
    *  The pole mass for the axial-vector form factors for the \f$c\to s\f$ transitiion.
    */
   Energy _mAcs;
 
   /**
    *  The pole mass for the axial-vector form factors for the \f$b\to d\f$ transitiion.
    */
   Energy _mAbd;
 
   /**
    *  The pole mass for the axial-vector form factors for the \f$c\to u\f$ transitiion.
    */
   Energy _mAcu;
 
 };
 
 }
 
 #endif /* HERWIG_ChengHeavyBaryonFormFactor_H */

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