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SSGNGVertex.h
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SSGNGVertex.h
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// -*- C++ -*-
//
// SSGNGVertex.h is a part of Herwig++ - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2007 The Herwig Collaboration
//
// Herwig++ is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef HERWIG_SSGNGVertex_H
#define HERWIG_SSGNGVertex_H
//
// This is the declaration of the SSGNGVertex class.
//
#include "ThePEG/Helicity/Vertex/Vector/GeneralFFVVertex.h"
#include "Herwig++/Models/Susy/MSSM.h"
#include "Herwig++/Models/Susy/MixingMatrix.fh"
namespace Herwig {
using namespace ThePEG;
/**
* This class implements the coupling of a photon to a pair of neutralinos
* via loop diagrams
* It inherits from GeneralFFVertex and implements the setCoupling method.
*
* @see \ref SSGNGVertexInterfaces "The interfaces"
* defined for SSGNGVertex.
* @see FFVertex
*/
class SSGNGVertex: public GeneralFFVVertex {
public:
/**
* The default constructor.
*/
SSGNGVertex();
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 the couplings.
* @param q2 The scale \f$q^2\f$ for the coupling at the vertex.
* @param part1 The ParticleData pointer for the first particle.
* @param part2 The ParticleData pointer for the second particle.
* @param part3 The ParticleData pointer for the third particle.
*/
virtual void setCoupling(Energy2 q2, tcPDPtr part1,
tcPDPtr part2, tcPDPtr part3);
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:
/**
* Evaluate the loop integrals
*/
void loopIntegrals(Energy Mi, Energy Mj, Energy M, Energy m,
complex<InvEnergy2> & I, complex<InvEnergy2> & J,
complex<InvEnergy2> & K, complex<InvEnergy2> & I2);
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 static object used to initialize the description of this class.
* Indicates that this is a concrete class with persistent data.
*/
static ClassDescription<SSGNGVertex> initSSGNGVertex;
/**
* The assignment operator is private and must never be called.
* In fact, it should not even be implemented.
*/
SSGNGVertex & operator=(const SSGNGVertex &);
private:
/**
* Pointer to the stop mixing matrix
*/
tMixingMatrixPtr _stop;
/**
* Pointer to the sbottom mixing matrix
*/
tMixingMatrixPtr _sbot;
/**
* The value of \f$sin(\theta_W)\f$
*/
double _sw;
/**
* The value of \f$cos(\theta_W)\f$
*/
double _cw;
/**
* Mass of the W
*/
Energy _mw;
/**
* \f$\sin(\beta)\f$
*/
double _sb;
/**
* \f$\cos(\beta)\f$
*/
double _cb;
/**
* Store the neutralino mixing matrix
*/
tMixingMatrixPtr _theN;
/**
* Store the id of the neutralino when the coupling was last evaluated
*/
long _idlast;
/**
* Store the value at which the coupling when it was last evalutated
*/
Energy2 _q2last;
/**
* Store the value of the coupling when it was last evalutated
*/
Complex _couplast;
/**
* Store the value of the left-coupling when it was last evalutated
*/
complex<InvEnergy> _leftlast;
/**
* Store the value of the right-coupling when it was last evalutated
*/
complex<InvEnergy> _rightlast;
};
}
#include "ThePEG/Utilities/ClassTraits.h"
namespace ThePEG {
/** @cond TRAITSPECIALIZATIONS */
/** This template specialization informs ThePEG about the
* base classes of SSGNGVertex. */
template <>
struct BaseClassTrait<Herwig::SSGNGVertex,1> {
/** Typedef of the first base class of SSGNGVertex. */
typedef ThePEG::Helicity::GeneralFFVVertex NthBase;
};
/** This template specialization informs ThePEG about the name of
* the SSGNGVertex class and the shared object where it is defined. */
template <>
struct ClassTraits<Herwig::SSGNGVertex>
: public ClassTraitsBase<Herwig::SSGNGVertex> {
/** Return a platform-independent class name */
static string className() { return "Herwig::SSGNGVertex"; }
/**
* The name of a file containing the dynamic library where the class
* SSGNGVertex is implemented. It may also include several, space-separated,
* libraries if the class SSGNGVertex depends on other classes (base classes
* excepted). In this case the listed libraries will be dynamically
* linked in the order they are specified.
*/
static string library() { return "HwSusy.so"; }
};
/** @endcond */
}
#endif /* HERWIG_SSGNGVertex_H */

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