/usr/include/ThePEG/Handlers/DecayHandler.h is in libthepeg-dev 1.8.0-1.
This file is owned by root:root, with mode 0o644.
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//
// DecayHandler.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_DecayHandler_H
#define ThePEG_DecayHandler_H
// This is the declaration of the DecayHandler class.
#include "StepHandler.h"
namespace ThePEG {
/**
* The DecayHandler is the base class of all handlers implementing the
* administration of decays of unstable particles. It is derived from
* the more general StepHandler class, and overrides the handle()
* method. This base class simply decays all unstable particle in the
* current step.
*
* @see \ref DecayHandlerInterfaces "The interfaces"
* defined for DecayHandler.
* @see StepHandler
* @see EventHandler
* @see SubProcessHandler
*
*/
class DecayHandler: public StepHandler {
public:
/** @name Standard constructors and destructors. */
//@{
/**
* Default constructor.
*/
DecayHandler() : theMaxLoop(100000), theMaxLifeTime(-1.0*mm), theLifeTimeOption(false) {}
/**
* Destructor.
*/
virtual ~DecayHandler();
//@}
public:
/** @name Virtual functions required by the StepHandler class. */
//@{
/**
* Look through all \a tagged particled and decay all unstable ones.
* @param eh the EventHandler in charge of the generation.
* @param tagged the vector of particles to consider. If empty, all
* final state particles in the current Step is considered.
* @param hint a possible Hint which is ignored in this implementation.
*/
virtual void handle(EventHandler & eh, const tPVector & tagged,
const Hint & hint);
//@}
/**
* Perform the decay of one unstable particle.
* @param parent the particle to be decayed.
* @param s the Step where decay products are inserted.
*/
void performDecay(tPPtr parent, Step & s) 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);
//@}
/**
* Standard Init function used to initialize the interface.
*/
static void Init();
/**
* The maximum number of failed decay attempts allowed for each
* particle.
*/
long maxLoop() const { return theMaxLoop; }
/**
* Get the maximum lifetime above which a particle is not decayed.
*/
Length maxLifeTime() const { return theMaxLifeTime; }
/**
* Option for whether the maximum lifetime should be applied to the
* mean lifetime of the particle species or the lifetime of the particle
* instance
*/
bool lifeTimeOption() const { return theLifeTimeOption; }
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:
/**
* The maximum number of failed decay attempts allowed for each
* particle.
*/
long theMaxLoop;
/**
* The maximum lifetime above which a particle is not decayed.
*/
Length theMaxLifeTime;
/**
* Option for how theMaxLifeTime should be interpreted
*/
bool theLifeTimeOption;
private:
/**
* Describe a concrete class with persistent data.
*/
static ClassDescription<DecayHandler> initDecayHandler;
/**
* Private and non-existent assignment operator.
*/
DecayHandler & operator=(const DecayHandler &);
};
/** @cond TRAITSPECIALIZATIONS */
/**
* This template specialization informs ThePEG about the
* base class of DecayHandler.
*/
template <>
struct BaseClassTrait<DecayHandler,1>: public ClassTraitsType {
/** Typedef of the base class of DecayHandler. */
typedef StepHandler NthBase;
};
/**
* This template specialization informs ThePEG about the name of the
* DecayHandler class.
*/
template <>
struct ClassTraits<DecayHandler>: public ClassTraitsBase<DecayHandler> {
/** Return the class name. */
static string className() { return "ThePEG::DecayHandler"; }
};
/** @endcond */
}
#endif /* ThePEG_DecayHandler_H */
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