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NonLeptonicOmegaDecayer.h
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// -*- C++ -*-
#ifndef HERWIG_NonLeptonicOmegaDecayer_H
#define HERWIG_NonLeptonicOmegaDecayer_H
// This is the declaration of the NonLeptonicOmegaDecayer class.
#include "Baryon1MesonDecayerBase.h"
namespace Herwig {
using namespace ThePEG;
/** \ingroup Decay
*
* The <code>NonLeptonicOmegaDecayer</code> class is designed for the non-leptonic
* weak decay of the Omega to a baryon from the lightest \f$SU(3)\f$ octet and a
* pseudoscalar meson. The results are taken from hep-ph/9905398.
*
* due to problems with the size of the d-wave term and recent measurements giving
* the opposite sign for the \f$\alpha\f$ parameter we have set this term to zero.
*
* @see Baryon1MesonDecayerBase.
*
*/
class NonLeptonicOmegaDecayer: public Baryon1MesonDecayerBase {
public:
/**
* Default constructor.
*/
NonLeptonicOmegaDecayer();
/**
* 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);
//@}
/**
* Standard Init function used to initialize the interfaces.
*/
static void Init();
protected:
/**
* Coupling Members.
*/
//@{
/**
* Couplings for spin-\f$\frac12\f$ to spin-\f$\frac32\f$ and a scalar.
* @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 A The coupling \f$A\f$ described above.
* @param B The coupling \f$B\f$ described above.
*/
virtual void threeHalfHalfScalarCoupling(int imode,Energy m0,Energy m1,Energy m2,
Complex& A,Complex& B) 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 to the begining of the run phase.
*/
virtual void doinitrun();
//@}
private:
/**
* Private and non-existent assignment operator.
*/
NonLeptonicOmegaDecayer & operator=(const NonLeptonicOmegaDecayer &);
private:
/**
* The \f$d^*\f$ coupling for the \f$B^*\f$ multiplet, this is \f$d^* /M_{B^*}\f$
* from the paper.
*/
double _dstar;
/**
* The \f$f^*\f$ coupling for the \f$B^*\f$ multiplet, this is \f$f^* /M_{B^*}\f$
* from the paper.
*/
double _fstar;
/**
* The \f$\omega_d\f$ coupling for the \f$R\f$ multiplet, this is \f$\omega_d/M_R\f$
* from the paper.
*/
double _omegad;
/**
* The \f$\omega_f\f$ coupling for the \f$R\f$ multiplet, this is \f$\omega_f/M_R\f$
* from the paper.
*/
double _omegaf;
/**
* The \f$\mathcal{C}_{B^*}\f$ coupling of the \f$B^*\f$ multiplet to the decuplet.
*/
double _cbstar;
/**
* The \f$s_c\f$ coupling of the \f$R\f$ multiplet to the decuplet.
*/
double _sc;
/**
* The \f$\mathcal{C}\f$ coupling of the decuplet to the ground state baryons.
*/
double _c;
/**
* The pion decay constant \f$f_\pi\f$.
*/
Energy _fpi;
/**
* The \f$h_\pi\f$ pion self-coupling.
*/
double _hpi;
/**
* The \f$h_c\f$ coupling.
*/
Energy _hc;
/**
* The \f$d\f$ coupling for the ground-state baryon multiplet.
*/
Energy _d;
/**
* The \f$f\f$ coupling for the ground-state baryon multiplet.
*/
Energy _f;
/**
* The mass of the \f$\Lambda^0\f$.
*/
Energy _mlambda;
/**
* The mass of the \f$\Xi\f$.
*/
Energy _mxi;
/**
* The mass of the \f$\Omega\f$.
*/
Energy _momega;
/**
* The mass of the \f$\Xi^*\f$.
*/
Energy _mxistar;
/**
* The mass of the \f$\pi^+\f$.
*/
Energy _mpip;
/**
* The mass of the \f$\pi^0\f$.
*/
Energy _mpi0;
/**
* The mass of the \f$K^+\f$.
*/
Energy _mkp;
/**
* The mass of the \f$K^0\f$.
*/
Energy _mk0;
/**
* The mass of the \f$B^*\f$ resonance, this is the \f$\frac12^+\f$ multiplet.
*/
Energy _mbstar;
/**
* The mass of the \f$R\f$ resonance, this is the \f$\frac12^-\f$ multiplet.
*/
Energy _mr;
/**
* use local values for the masses for the couplings
*/
bool _localmasses;
/**
* The PDG code for the incoming baryon.
*/
long _incomingB;
/**
* The PDG code for the outgoing baryon.
*/
vector<long> _outgoingB;
/**
* The PDG code for the outgoing meson.
*/
vector<long> _outgoingM;
/**
* The \f$A\f$ coefficient for the decays.
*/
vector<InvEnergy> _a;
/**
* The \f$B\f$ coefficient for the decays.
*/
vector<InvEnergy> _b;
/**
* The maximum weights for the decays.
*/
vector<double> _maxweight;
};
}
#endif /* HERWIG_NonLeptonicOmegaDecayer_H */

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