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SSWSSVertex.h
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// -*- C++ -*-
//
// SSWSSVertex.h is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2019 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_SSWSSVertex_H
#define HERWIG_SSWSSVertex_H
//
// This is the declaration of the SSWSSVertex class.
//
#include "ThePEG/Helicity/Vertex/Scalar/VSSVertex.h"
#include "MSSM.h"
namespace Herwig {
using namespace ThePEG;
/**
* This is the implementation of the coupling of an SM gauge boson to
* a pair of sfermions.
* It inherits from VSSVertex and implements the setCoupling() method.
*
* @see VSSVertex
*/
class SSWSSVertex: public VSSVertex {
public:
/**
* The default constructor.
*/
SSWSSVertex();
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:
/** @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 assignment operator is private and must never be called.
* In fact, it should not even be implemented.
*/
SSWSSVertex & operator=(const SSWSSVertex &) = delete;
/**
* Value of \f$sin(\theta_w)\f$
*/
double _sw;
/**
* Value of \f$cos(\theta_w)\f$
*/
double _cw;
/**
* Scale at which the coupling was last evaluated
*/
Energy2 _q2last;
/**
* Value of coupling when last evaluated
*/
Complex _couplast;
/**
* Stau mixing matrix
*/
tMixingMatrixPtr _stau;
/**
* Stop mixing matrix
*/
tMixingMatrixPtr _stop;
/**
* Sbottom mixing matrix
*/
tMixingMatrixPtr _sbottom;
/**
* The up type sfermion present when the vertex was evaluated.
*/
long _ulast;
/**
* The down type sfermion present when the vertex was evaluated.
*/
long _dlast;
/**
* The gauge boson present when the vertex was last evaluated.
*/
long _gblast;
/**
* The value of the mixing matrix dependent part when the vertex was
* last evaluated
*/
Complex _factlast;
};
}
#endif /* HERWIG_SSWSSVertex_H */

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