/usr/include/ThePEG/PDT/Onium3GDecayer.h is in libthepeg-dev 1.8.0-1.1.
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//
// Onium3GDecayer.h is a part of ThePEG - Toolkit for HEP Event Generation
// Copyright (C) 1999-2011 Leif Lonnblad
//
// ThePEG is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef THEPEG_Onium3GDecayer_H
#define THEPEG_Onium3GDecayer_H
// This is the declaration of the Onium3GDecayer class.
#include "ThePEG/PDT/FlatDecayer.h"
namespace ThePEG {
/**
* The Onium3GDecayer class inherits from performs FlatDecayer and
* will reweight the flat phase space suitable to describe the decay
* of a spin-1 onium resonance into three gluons or two gluons and a
* photon. After the decay the collision handler is instructed to
* restart the generation from the hadronization (or optionally the
* parton cascade) stage.
*
* @see \ref Onium3GDecayerInterfaces "The interfaces"
* defined for Onium3GDecayer.
* @see FlatDecayer
* @see ParticleData
*/
class Onium3GDecayer: public FlatDecayer {
public:
/** @name Standard constructors and destructors. */
//@{
/**
* Default constructor.
*/
Onium3GDecayer() : doShower(true), theMinGGMass(2.0*GeV) {}
/**
* Destructor.
*/
virtual ~Onium3GDecayer();
//@}
public:
/** @name Virtual functions required by the Decayer class.
*/
//@{
/**
* Check if this decayer can perfom the decay specified by the
* given decay mode.
* @param dm the DecayMode describing the decay.
* @return true if this decayer can handle the given mode, otherwise false.
*/
virtual bool accept(const DecayMode & dm) const;
/**
* Perform a decay for a given DecayMode and a given Particle instance.
* @param dm the DecayMode describing the decay.
* @param p the Particle instance to be decayed.
* @return a ParticleVector containing the decay products.
*/
virtual ParticleVector decay(const DecayMode & dm, const Particle & p) const;
/**
* Give a weight to a phase space point. To be overridden by
* subclasses. For a given decay mode, \a dm, decaying \a parent
* particle and decayproducts, \a children, distributed according to
* a flat distribution in phase space, return a weight (less or
* equal to unity) modifying the flat distribution to the desired
* one. Note that the chosen phase space point may be rejected, but
* the chosen decay channel will not. This means that the weight
* returned by this function does not influence the branching
* ratios.
*/
virtual double reweight(const DecayMode & dm, const Particle & parent,
const ParticleVector & children) const;
//@}
/**
* Return true if the produced gluons should be showered.
*/
bool shower() const { return doShower; }
/**
* Return the minimum invariant mass between two gluons in gamma-g-g
* decays.
*/
Energy minGGMass() const { return theMinGGMass; }
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:
/** @name Clone Methods. */
//@{
/**
* Make a simple clone of this object.
* @return a pointer to the new object.
*/
virtual IBPtr clone() const;
/** 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;
//@}
private:
/**
* If true the produced gluons should be showered.
*/
bool doShower;
/**
* The minimum invariant mass between two gluons in gamma-g-g
* decays.
*/
Energy theMinGGMass;
private:
/**
* Describe a concrete class with persistent data.
*/
static ClassDescription<Onium3GDecayer> initOnium3GDecayer;
/**
* Private and non-existent assignment operator.
*/
Onium3GDecayer & operator=(const Onium3GDecayer &);
};
}
namespace ThePEG {
/** @cond TRAITSPECIALIZATIONS */
/** This template specialization informs ThePEG about the base classes
* of Onium3GDecayer. */
template <>
struct BaseClassTrait<Onium3GDecayer,1>: public ClassTraitsType {
/** Typedef of the first base class of Onium3GDecayer. */
typedef FlatDecayer NthBase;
};
/** This template specialization informs ThePEG about the name of the
* Onium3GDecayer class and the shared object where it is
* defined. */
template <>
struct ClassTraits<Onium3GDecayer>
: public ClassTraitsBase<Onium3GDecayer> {
/** Return a platform-independent class name */
static string className() { return "ThePEG::Onium3GDecayer"; }
/** Return the name of the shared library be loaded to get access to
* the Onium3GDecayer class and every other class it uses
* (except the base class). */
static string library() { return "Onium3GDecayer.so"; }
};
/** @endcond */
}
#endif /* THEPEG_Onium3GDecayer_H */
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