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FS_QtildaShowerKinematics1to2.h
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FS_QtildaShowerKinematics1to2.h
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// -*- C++ -*-
#ifndef HERWIG_FS_QtildaShowerKinematics1to2_H
#define HERWIG_FS_QtildaShowerKinematics1to2_H
//
// This is the declaration of the FS_QtildaShowerKinematics1to2 class.
#include "QtildaShowerKinematics1to2.h"
namespace Herwig {
using namespace ThePEG;
/** \ingroup Shower
*
* This (concrete) class provides the specific Final State shower
* kinematics information.
*
* @see QtildaShowerKinematics1to2
* @see IS_QtildaShowerKinematics1to2
* @see KinematicsReconstructor
*/
class FS_QtildaShowerKinematics1to2 : public QtildaShowerKinematics1to2 {
public:
/**
* Standard ctors and dtor.
*/
inline FS_QtildaShowerKinematics1to2();
inline FS_QtildaShowerKinematics1to2(const FS_QtildaShowerKinematics1to2 &);
virtual ~FS_QtildaShowerKinematics1to2();
/**
* Creator with the two defining vectors p and n .
*/
inline FS_QtildaShowerKinematics1to2( const Lorentz5Momentum & p,
const Lorentz5Momentum & n );
/**
* Along with the showering evolution --- going forward for
* time-like (forward) evolution, and going backward for space-like
* (backward) evolution --- the Sudakov variables associated to the
* branching products are calcalted and returned, from the knowledge
* of the parent Sudakov variables.
* Note that only alpha and p_perp can be reconstructed
* at this moment and we will obtain instead beta only later,
* using updateParent().
*/
virtual void updateChildren( const double parentSudAlpha,
const Energy parentSudPx, const Energy parentSudPy,
vector<double> & sudAlphaVect,
vector<Energy> & sudPxVect, vector<Energy> & sudPyVect );
/**
* Along with the showering evolution --- going forward for
* time-like (forward) evolution, and going backward for space-like
* (backward) evolution --- the kinematical variables of the
* branching products are calculated and updated from the knowledge
* of the parent kinematics. This method is used by the
* ForwardShowerEvolver.
* ***ACHTUNG*** Might be extended to update colour connections as well.
*/
virtual void updateChildren( const tShowerParticlePtr theParent,
const ParticleVector theChildren );
/**
* Update the parent Kinematics from the knowledge of the kinematics
* of the children. This method will be used by the
* KinematicsReconstructor.
*/
virtual void updateParent( const tShowerParticlePtr theParent,
const ParticleVector theChildren );
/**
* Update the kinematical data of a particle when a reconstruction
* fixpoint was found. This will highly depend on the kind of
* kinematics chosen and will be defined in the inherited concrete
* classes. This method will be used by the KinematicsReconstructor.
*/
virtual void updateLast( const tShowerParticlePtr theLast );
/**
* The method returns the mass of jet.
* It should be used only if isTheJetStartingPoint()
* is true, and only after the jet kinematics reconstruction.
* (performed by the KinematicsReconstructor class).
*/
virtual Energy jetMass();
private:
/**
* Private and non-existent assignment operator.
*/
FS_QtildaShowerKinematics1to2 & operator=(const FS_QtildaShowerKinematics1to2 &);
};
}
#include "FS_QtildaShowerKinematics1to2.icc"
#endif /* HERWIG_FS_QtildaShowerKinematics1to2_H */

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