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MelikhovStechFormFactor.h
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// -*- C++ -*-
//
// MelikhovStechFormFactor.h is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2017 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_MelikhovStechFormFactor_H
#define HERWIG_MelikhovStechFormFactor_H
//
// This is the declaration of the MelikhovStechFormFactor class.
//
#include "ScalarFormFactor.h"
namespace Herwig {
using namespace ThePEG;
/** \ingroup Decay
*
* The MelikhovStechFormFactor class is the implementation of the form factors
* from Phys. Rev. D62 014006 (2000).
*
* @see ScalarFormFactor
*/
class MelikhovStechFormFactor: public ScalarFormFactor {
public:
/**
* The default constructor.
*/
MelikhovStechFormFactor();
/** @name Form-Factors */
//@{
/**
* The form factor for the weak decay of a scalar to a scalar.
* @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 meson.
* @param id1 The PDG code of the outgoing meson.
* @param m0 The mass of the incoming meson.
* @param m1 The mass of the outgoing meson.
* @param f0 The form-factor \f$f_0\f$.
* @param fp The form-factor \f$f_+\f$.
*/
virtual void ScalarScalarFormFactor(Energy2 q2,unsigned int iloc,int id0,int id1,
Energy m0,Energy m1,
Complex & f0,Complex & fp) const;
/**
* The form factor for the weak decay of a scalar to a vector.
* @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 meson.
* @param id1 The PDG code of the outgoing meson.
* @param m0 The mass of the incoming meson.
* @param m1 The mass of the outgoing meson.
* @param V The form-factor \f$V\f$
* @param A0 The form-factor \f$A_0\f$
* @param A1 The form-factor \f$A_1\f$
* @param A2 The form-factor \f$A_2\f$
*/
virtual void ScalarVectorFormFactor(Energy2 q2, unsigned int iloc, int id0, int id1,
Energy m0, Energy m1, Complex & V,
Complex & A0,Complex & A1,Complex & A2) const;
/**
* The form factor for the weak penguin decay of a scalar meson to a scalar meson.
* This method is virtual
* and must be implemented in classes inheriting from this which include scalar to
* scalar penguin form factors.
* @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 meson.
* @param id1 The PDG code of the outgoing meson.
* @param m0 The mass of the incoming meson.
* @param m1 The mass of the outgoing meson.
* @param fT The form factor \f$f_T\f$.
*/
virtual void ScalarScalarSigmaFormFactor(Energy2 q2,unsigned int iloc,int id0,int id1,
Energy m0, Energy m1,Complex & fT) const;
/**
* The form factor for the weak penguin decay of a scalar meson to a vector meson.
* This method is virtual
* and must be implemented in classes inheriting from this which include scalar to
* vector penguin form factors.
* @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 meson.
* @param id1 The PDG code of the outgoing meson.
* @param m0 The mass of the incoming meson.
* @param m1 The mass of the outgoing meson.
* @param T1 The form factor \f$T_1\f$.
* @param T2 The form factor \f$T_2\f$.
* @param T3 The form factor \f$T_3\f$.
*/
virtual void ScalarVectorSigmaFormFactor(Energy2 q2,unsigned int iloc,int id0,int id1,
Energy m0, Energy m1, Complex & T1,
Complex & T2, Complex & T3) 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
* @param create Whether or not to add a statement creating the object
*/
virtual void dataBaseOutput(ofstream & os,bool header,bool create) 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:
/** @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:
/**
* The assignment operator is private and must never be called.
* In fact, it should not even be implemented.
*/
MelikhovStechFormFactor & operator=(const MelikhovStechFormFactor &) = delete;
private:
/** @name Parameters for the scalar to scalar form factors */
//@{
/**
* The value of \f$F_+(0)\f$ for the form factors.
*/
vector<double> _fplus0;
/**
* The \f$\sigma_1\f$ parameter for the \f$F_+\f$ form factor.
*/
vector<double> _sigma1fp;
/**
* The \f$\sigma_2\f$ parameter for the \f$F_+\f$ form factor.
*/
vector<double> _sigma2fp;
/**
* The value of \f$F_0(0)\f$ for the form factors.
*/
vector<double> _f00;
/**
* The \f$\sigma_1\f$ parameter for the \f$F_0\f$ form factor.
*/
vector<double> _sigma1f0;
/**
* The \f$\sigma_2\f$ parameter for the \f$F_0\f$ form factor.
*/
vector<double> _sigma2f0;
/**
* The value of \f$F_T(0)\f$ for the form factors.
*/
vector<double> _fT0;
/**
* The \f$\sigma_1\f$ parameter for the \f$F_T\f$ form factor.
*/
vector<double> _sigma1fT;
/**
* The \f$\sigma_2\f$ parameter for the \f$F_T\f$ form factor.
*/
vector<double> _sigma2fT;
//@}
/** @name Parameters for the scalar to vector form factors */
//@{
/**
* The value of \f$V(0)\f$ for the form factors
*/
vector<double> _V0;
/**
* The \f$\sigma_1\f$ parameter for the \f$V_0\f$ form factor.
*/
vector<double> _sigma1V0;
/**
* The \f$\sigma_2\f$ parameter for the \f$V_0\f$ form factor.
*/
vector<double> _sigma2V0;
/**
* The value of \f$A_0(0)\f$ for the form factors
*/
vector<double> _A00;
/**
* The \f$\sigma_1\f$ parameter for the \f$A_0\f$ form factor.
*/
vector<double> _sigma1A0;
/**
* The \f$\sigma_2\f$ parameter for the \f$A_0\f$ form factor.
*/
vector<double> _sigma2A0;
/**
* The value of \f$A_1(0)\f$ for the form factors
*/
vector<double> _A10;
/**
* The \f$\sigma_1\f$ parameter for the \f$A_1\f$ form factor.
*/
vector<double> _sigma1A1;
/**
* The \f$\sigma_2\f$ parameter for the \f$A_1\f$ form factor.
*/
vector<double> _sigma2A1;
/**
* The value of \f$A_2(0)\f$ for the form factors
*/
vector<double> _A20;
/**
* The \f$\sigma_1\f$ parameter for the \f$A_2\f$ form factor.
*/
vector<double> _sigma1A2;
/**
* The \f$\sigma_2\f$ parameter for the \f$A_2\f$ form factor.
*/
vector<double> _sigma2A2;
/**
* The value of \f$T_1(0)\f$ for the form factors
*/
vector<double> _T10;
/**
* The \f$\sigma_1\f$ parameter for the \f$T_1\f$ form factor.
*/
vector<double> _sigma1T1;
/**
* The \f$\sigma_2\f$ parameter for the \f$T_1\f$ form factor.
*/
vector<double> _sigma2T1;
/**
* The value of \f$T_2(0)\f$ for the form factors
*/
vector<double> _T20;
/**
* The \f$\sigma_1\f$ parameter for the \f$T_2\f$ form factor.
*/
vector<double> _sigma1T2;
/**
* The \f$\sigma_2\f$ parameter for the \f$T_2\f$ form factor.
*/
vector<double> _sigma2T2;
/**
* The value of \f$T_3(0)\f$ for the form factors
*/
vector<double> _T30;
/**
* The \f$\sigma_1\f$ parameter for the \f$T_2\f$ form factor.
*/
vector<double> _sigma1T3;
/**
* The \f$\sigma_2\f$ parameter for the \f$T_2\f$ form factor.
*/
vector<double> _sigma2T3;
//@}
/**
* The scalar mass for the \f$q^2\f$ dependence of the form factor.
*/
vector<Energy> _massP;
/**
* The vector mass for the \f$q^2\f$ dependence of the form factor.
*/
vector<Energy> _massV;
/**
* The \f$\eta-\eta'\f$ mixing angle
*/
double _thetaeta;
};
}
#endif /* HERWIG_MelikhovStechFormFactor_H */

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