/usr/include/ThePEG/Handlers/DecayHandler.h is in libthepeg-dev 1.8.0-1.1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 | // -*- C++ -*-
//
// 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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