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ThreeBodyOnShellME.h
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ThreeBodyOnShellME.h
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// -*- C++ -*-
#ifndef HERWIG_ThreeBodyOnShellME_H
#define HERWIG_ThreeBodyOnShellME_H
// This is the declaration of the ThreeBodyOnShellME class.
#include <ThePEG/PDT/Decayer.h>
#include "CLHEP/GenericFunctions/AbsFunction.hh"
#include "Herwig++/Decay/DecayIntegrator.fh"
namespace Herwig {
using namespace Genfun;
using namespace ThePEG;
/** \ingroup PDT
*
* This is a simple class to allow the integration of the threeBodyMatrixElement
* member of the DecayIntegrator class using the ThreeBodyIntegrator class
*
* @see DecayIntegrator
* @see ThreeBodyAllOnCalculator
*
*/
class ThreeBodyOnShellME: public Genfun::AbsFunction {
/**
* FunctionComposition operator
*/
virtual FunctionComposition operator()(const AbsFunction &function) const;
/**
* Clone method
*/
ThreeBodyOnShellME *clone() const;
private:
/**
* Clone method
*/
virtual AbsFunction *_clone() const;
public:
/**
* Constructor
* @param decayer Pointer to the decayer.
* @param mode The mode we are integrating
*/
ThreeBodyOnShellME(DecayIntegratorPtr decayer, int mode);
/**
* Destructor
*/
virtual ~ThreeBodyOnShellME();
/**
* The number of variables this is a function of (i.e. 7)
*/
virtual unsigned int dimensionality() const ;
/**
* Copy constructor
*/
ThreeBodyOnShellME(const ThreeBodyOnShellME &right);
/**
* Retreive function value
*/
virtual double operator ()(double) const {return 0.;}
/**
* Retreive function value
*/
virtual double operator ()(const Argument & a) const ;
private:
/**
* It is illegal to assign a function
*/
const ThreeBodyOnShellME &
operator=(const ThreeBodyOnShellME &right);
private:
/**
* Pointer to the decayer.
*/
DecayIntegratorPtr _decayer;
/**
* The mode we are integrating
*/
int _mode;
};
}
#include "ThreeBodyOnShellME.icc"
#endif /* HERWIG_ThreeBodyOnShellME_H */

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