/usr/include/ThePEG/MatrixElement/ReweightBase.h is in libthepeg-dev 1.8.0-1.
This file is owned by root:root, with mode 0o644.
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//
// ReweightBase.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_ReweightBase_H
#define ThePEG_ReweightBase_H
// This is the declaration of the ReweightBase class.
#include "ThePEG/Handlers/HandlerBase.h"
#include "ThePEG/EventRecord/SubProcess.h"
#include "ThePEG/Handlers/LastXCombInfo.h"
#include "ThePEG/Handlers/StandardXComb.fh"
namespace ThePEG {
/**
* The ReweightBase class is the base class of all objects
* representing external biases to matrix elements. These can be used
* to enhance certain matrix elements or certain phase space
* regions. They can be used in two ways, either to completely change
* the matrix element (re-weight), in which case the total cross
* section will be affected or, when using weighted events in an
* EventHandler, to pre-weight certain events but leaving the cross
* section unchanged
*
* There is only one virtual function which must be overridden in
* derived classes: weight().
*
* @see \ref ReweightBaseInterfaces "The interfaces"
* defined for ReweightBase.
* @see MEBase
* @see EventHandler
* @see SubProcessHandler
*/
class ReweightBase: public HandlerBase, public LastXCombInfo<> {
public:
/** @name Standard constructors and destructors. */
//@{
/**
* Destructor.
*/
virtual ~ReweightBase();
//@}
public:
/**
* Return the wieght for the kinematical configuation provided by
* the assigned XComb object (in the LastXCombInfo base class).
*/
virtual double weight() const = 0;
/**
* Assigne an XComb object with information about the sub-process to
* be used in the reweighting.
*/
void setXComb(tXCombPtr xc);
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 interfaces.
*/
static void Init();
private:
/**
* Describe an abstract base class with persistent data.
*/
static AbstractClassDescription<ReweightBase> initReweightBase;
/**
* Private and non-existent assignment operator.
*/
ReweightBase & operator=(const ReweightBase &);
};
}
namespace ThePEG {
/** @cond TRAITSPECIALIZATIONS */
/**
* This template specialization informs ThePEG about the base class of
* ReweightBase.
*/
template <>
struct BaseClassTrait<ReweightBase,1>: public ClassTraitsType {
/** Typedef of the base class of ReweightBase. */
typedef HandlerBase NthBase;
};
/**
* This template specialization informs ThePEG about the name of the
* ReweightBase class.
*/
template <>
struct ClassTraits<ReweightBase>: public ClassTraitsBase<ReweightBase> {
/** Return the class name. */
static string className() { return "ThePEG::ReweightBase"; }
};
/** @endcond */
}
#endif /* ThePEG_ReweightBase_H */
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