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HeavyDecayer.h
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// -*- C++ -*-
#ifndef HERWIG_HeavyDecayer_H
#define HERWIG_HeavyDecayer_H
// This is the declaration of the HeavyDecayer class.
#include <ThePEG/Config/ThePEG.h>
#include <ThePEG/PDT/Decayer.h>
#include <ThePEG/Handlers/HandlerBase.h>
#include <ThePEG/Interface/Interfaced.h>
#include <ThePEG/PDT/DecayMode.h>
#include <ThePEG/Repository/Strategy.fh>
#include "DecayConfig.h"
#include <fstream>
namespace Herwig {
using namespace ThePEG;
/** \ingroup Decay
*
* <code>HeavyDecayer</code> is a class that defines all the general routines
* used in HERWIG++ to imitate the HERWIG 6.4 decays. The goal is to have an exact
* copy of HERWIG 6.4 decay routines. This will allow for easy 'callibration'
* of the new C++ code with the old Fortran code.
*
* This class is designed for the partonic decay of a bottom or charm mesons
* and baryons. In is
* only supports four body partonic decays.
*
* Two types of matrix element are supported for this decay
*
* - MECode=0 flat-phase space
* - MECode=100 V-A matrix element for the heavy quark decay in the spectator model.
*
* @see QuarkoniumDecayer
* @see Hw64Decayer
* @see Decayer
*
*/
class HeavyDecayer: public Decayer {
public:
/** @name Standard constructors and destructors. */
//@{
/**
* Default constructor
*/
inline HeavyDecayer();
/**
* Copy constructor
*/
inline HeavyDecayer(const HeavyDecayer &);
/**
* Destructor
*/
virtual ~HeavyDecayer();
//@}
public:
/**
* return true if this decayer can perfom the decay specified by the
* given decay mode.
*/
virtual bool accept(const DecayMode &) const;
/**
* for a given decay mode and a given particle instance, perform the
* decay and return the decay products.
*/
virtual ParticleVector decay(const DecayMode &, const Particle &) const;
/**
* Standard Init function used to initialize the interface.
*/
static void Init();
/** @name Standard Interfaced functions. */
//@{
/**
* Check sanity of the object during the setup phase.
*/
inline virtual void doupdate() throw(UpdateException);
/**
* Initialize this object after the setup phase before saving and
* EventGenerator to disk.
* @throws InitException if object could not be initialized properly.
*/
inline virtual void doinit() throw(InitException);
/**
* Finalize this object. Called in the run phase just after a
* run has ended. Used eg. to write out statistics.
*/
inline virtual void dofinish();
/**
* Rebind pointer to other Interfaced objects. Called in the setup phase
* after all objects used in an EventGenerator has been cloned so that
* the pointers will refer to the cloned objects afterwards.
* @param trans a TranslationMap relating the original objects to
* their respective clones.
* @throws RebindException if no cloned object was found for a given pointer.
*/
inline virtual void rebind(const TranslationMap & trans)
throw(RebindException);
/**
* Return a vector of all pointers to Interfaced objects used in
* this object.
* @return a vector of pointers.
*/
inline virtual IVector getReferences();
//@}
/** @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);
//@}
/** @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 code for the matrix element being used.
*/
int MECode;
/**
* Weighting of phase space for V-A matrix elements
*/
static double VAWt(double*);
/**
* Describe a concrete class with persistent data.
*/
static ClassDescription<HeavyDecayer> initHeavyDecayer;
/**
* This control adding handlers but doesn't seem to be used any more
*/
static long lastAddedNumber;
/**
* Private and non-existent assignment operator.
*/
const HeavyDecayer & operator=(const HeavyDecayer &);
};
}
namespace ThePEG {
/**
* This template specialization informs ThePEG about the base class of
* HeavyDecayer.
*/
template <>
struct BaseClassTrait<Herwig::HeavyDecayer,1> {
/** Typedef of the base class of HeavyDecayer. */
typedef HandlerBase NthBase;
};
/**
* This template specialization informs ThePEG about the name of the
* HeavyDecayer class.
*/
template <>
struct ClassTraits<Herwig::HeavyDecayer>: public ClassTraitsBase<Herwig::HeavyDecayer> {
/** Return the class name. */
static string className() { return "Herwig++::HeavyDecayer"; }
/** Return the name of the shared library to be loaded to get
* access to this class and every other class it uses
* (except the base class).
*/
static string library() { return "libHwDecay.so"; }
};
}
#include "HeavyDecayer.icc"
#endif /* HERWIG_HeavyDecayer_H */

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