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 // -*- C++ -*-
 #ifndef HERWIG_RadiativeHeavyBaryonDecayer_H
 #define HERWIG_RadiativeHeavyBaryonDecayer_H
 //
 // This is the declaration of the RadiativeHeavyBaryonDecayer class.
 //
 
 #include "Baryon1MesonDecayerBase.h"
 
 namespace Herwig {
 using namespace Herwig;
 
 /** \ingroup Decay
  *
  * The RadiativeHeavyBaryonDecayer class is designed for the radiative decay
  * of a baryon containing a heavy quark to another baryon containing a heavy quark.
  * There are four types of transition supported
  *
  * - \f$\frac12^-\to\frac12^+\f$ \f$E1\f$ transition
  * \f[\mathcal{M} = A_{E1}\bar{B}\gamma^\mu\gamma_5B^*F^{\mu\nu}p_{0\mu}\f]
  *
  * - \f$\frac12^+\to\frac12^+\f$ \f$M1\f$ transition
  * \f[\mathcal{M} = A_{M1}\bar{B}\sigma^{\mu\nu}B^*F^{\mu\nu}\f]
  *
  * - \f$\frac32^-\to\frac12^+\f$ \f$E1\f$ transition
  * \f[\mathcal{M} = A_{E1}\bar{B}B^*_\nu F^{\mu\nu}p_{0\mu}\f]
  *
  * - \f$\frac32^+\to\frac12^+\f$ \f$M1\f$ transition
  * \f[\mathcal{M} = A_{M1}\bar{B}\gamma_\mu\gamma_5B^*_\nu F^{\mu\nu}\f]
  *
  * where \f$p_0\f$ is the momentum of the decaying baryon \f$B^*\f$ is the field for
  * the decaying baryon, \f$B\f$ is the field for the baryon produced in the decay and
  * \f$F^{\mu\nu}\f$ is the electromagnetic field strength tensor.
  *
  */
 class RadiativeHeavyBaryonDecayer: public Baryon1MesonDecayerBase {
 
 public:
 
   /**
    * Which of the possible decays is required
    * @param cc Is this mode the charge conjugate
    * @param parent The decaying particle
    * @param children The decay products
    */
   virtual int modeNumber(bool & cc, tcPDPtr parent, 
              const tPDVector & children) const;
 
   /**
    * 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
    */
   virtual void dataBaseOutput(ofstream & os,bool header) const;
 
 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();
 
 protected:
 
   /**
    *  Coupling Members.
    */
   //@{
   /**
    * Couplings for spin-\f$\frac12\f$ to spin-\f$\frac12\f$ and a vector.
    * @param imode The mode
    * @param m0 The mass of the decaying particle.
    * @param m1 The mass of the outgoing baryon.
    * @param m2 The mass of the outgoing meson.
    * @param A1 The coupling \f$A_1\f$ described above.
    * @param A2 The coupling \f$A_2\f$ described above.
    * @param B1 The coupling \f$B_1\f$ described above.
    * @param B2 The coupling \f$B_2\f$ described above.
    */
   virtual void halfHalfVectorCoupling(int imode,Energy m0,Energy m1,Energy m2,
                       Complex& A1,Complex& A2,
                       Complex& B1,Complex& B2) const;
 
   /**
    * Couplings for spin-\f$\frac12\f$ to spin-\f$\frac32\f$ and a vector.
    * @param imode The mode
    * @param m0 The mass of the decaying particle.
    * @param m1 The mass of the outgoing baryon.
    * @param m2 The mass of the outgoing meson.
    * @param A1 The coupling \f$A_1\f$ described above.
    * @param A2 The coupling \f$A_2\f$ described above.
    * @param A3 The coupling \f$A_3\f$ described above.
    * @param B1 The coupling \f$B_1\f$ described above.
    * @param B2 The coupling \f$B_2\f$ described above.
    * @param B3 The coupling \f$B_3\f$ described above.
    */
   virtual void threeHalfHalfVectorCoupling(int imode,Energy m0,Energy m1,Energy m2,
                        Complex& A1,Complex& A2,Complex& A3,
                        Complex& B1,Complex& B2,Complex& B3) 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();
 
   /**
    * Initialize this object. Called in the run phase just before
    * a run begins.
    */
   virtual void doinitrun();
   //@}
 
 private:
 
   /**
    * The assignment operator is private and must never be called.
    * In fact, it should not even be implemented.
    */
   RadiativeHeavyBaryonDecayer & operator=(const RadiativeHeavyBaryonDecayer &) = delete;
 
 public:
 
   /**
    *   Set the parameters for a decay mode
    */
   string setUpDecayMode(string arg);
 
 private:
 
   /**
    *  The \f$M1\f$ coupling
    */
   vector<InvEnergy>  M1Coupling_;
 
   /**
    *  The \f$E1\f$ coupling
    */
   vector<InvEnergy2> E1Coupling_;
 
   /**
    * PDG code for the incoming baryons
    */
   vector<int> incoming_;
 
   /**
    * PDG code for the outgoing baryons
    */
   vector<int> outgoing_;
 
   /**
    * The type of matrix element
    */
   vector<int> modeType_;
 
   /**
    * max weight
    */
   vector<double> maxWeight_;
 };
 
 }
 
 #endif /* HERWIG_RadiativeHeavyBaryonDecayer_H */

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