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BackwardShowerEvolver.h
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BackwardShowerEvolver.h
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// -*- C++ -*-
#ifndef HERWIG_BackwardShowerEvolver_H
#define HERWIG_BackwardShowerEvolver_H
//
// This is the declaration of the <!id>BackwardShowerEvolver<!!id> class.
//
// This class is responsible for the backward evolution of a space-like particles <BR>
// (and recursively to all their time-like radiation products). <BR>
//
// CLASSDOC SUBSECTION See also:
//
// <a href="http:SplittingGenerator.html">SplittingGenerator.h</a>, <BR>
// <a href="http:RhoDMatrixPropagator.html">RhoDMatrixPropagator.h</a>, <BR>
// <a href="http:ForwardShowerEvolver.html">ForwardShowerEvolver.h</a>.
//
#include "Pythia7/Handlers/HandlerBase.h"
#include "Pythia7/Handlers/PartialCollisionHandler.h"
#include "Herwig++/Config/GlobalParameters.h"
#include "ShowerConfig.h"
#include "SplittingGenerator.h"
#include "RhoDMatrixPropagator.h"
#include "ForwardShowerEvolver.h"
namespace Herwig {
using namespace Pythia7;
class BackwardShowerEvolver: public Pythia7::HandlerBase {
public:
inline BackwardShowerEvolver();
inline BackwardShowerEvolver(const BackwardShowerEvolver &);
virtual ~BackwardShowerEvolver();
// Standard ctors and dtor.
bool spaceLikeShower( tPartCollHdlPtr ch,
const tShoConstrPtr showerConstrainer,
const tMECorrectionPtr meCorrectionPtr,
tShoParPtr particle, CollecShoParPtr & collecShoPar )
throw (Veto, Stop, Exception);
// It does the backward evolution of the space-like input <!id>particle<!!id>
// (and recursively for all its time-like radiation products).
// accepting only emissions which conforms to the <!id>showerConstrainer<!!id>
// and soft matrix element correction pointed by <!id>meCorrectionPtr<!!id>.
// The <!id>ParticleCollisionHandler<!!id> object is needed to access the PDFs.
// If at least one emission has occurred then the method returns true
// and all the new created <!id>ShowerParticle<!!id> objects (but not the input
// particle) are added to the collection <!id>collecShoPar<!!id> (which can
// contain, at the beginning of the method, either the full collection
// of <!id>ShowerParticle<!!id> already created so far by the showering,
// or being empty: the choice is up to the caller).
public:
void persistentOutput(PersistentOStream &) const;
void persistentInput(PersistentIStream &, int);
// Standard functions for writing and reading from persistent streams.
static void Init();
// Standard Init function used to initialize the interfaces.
protected:
inline virtual IBPtr clone() const;
inline virtual IBPtr fullclone() const;
// Standard clone methods.
protected:
inline virtual void doupdate() throw(UpdateException);
inline virtual void doinit() throw(InitException);
inline virtual void dofinish();
// Standard Interfaced virtual functions.
inline virtual void rebind(const TranslationMap & trans)
throw(RebindException);
// Change all pointers to Interfaced objects to corresponding clones.
inline virtual IVector getReferences();
// Return pointers to all Interfaced objects refered to by this.
private:
static ClassDescription<BackwardShowerEvolver> initBackwardShowerEvolver;
// Describe a concrete class with persistent data.
BackwardShowerEvolver & operator=(const BackwardShowerEvolver &);
// Private and non-existent assignment operator.
Ptr<SplittingGenerator>::pointer _pointerSplittingGenerator;
Ptr<RhoDMatrixPropagator>::pointer _pointerRhoDMatrixPropagator;
Ptr<ForwardShowerEvolver>::pointer _pointerForwardShowerEvolver;
};
}
// CLASSDOC OFF
namespace Pythia7 {
// The following template specialization informs Pythia7 about the
// base class of BackwardShowerEvolver.
template <>
struct BaseClassTrait<Herwig::BackwardShowerEvolver,1> {
typedef Pythia7::HandlerBase NthBase;
};
// The following template specialization informs Pythia7 about the
// name of this class and the shared object where it is defined.
template <>
struct ClassTraits<Herwig::BackwardShowerEvolver>: public ClassTraitsBase<Herwig::BackwardShowerEvolver> {
static string className() { return "/Herwig++/BackwardShowerEvolver"; }
// Return the class name.
static string library() { return "libHwShower.so"; }
// 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).
};
}
#include "BackwardShowerEvolver.icc"
#endif /* HERWIG_BackwardShowerEvolver_H */

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