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MatchboxReweightBase.h
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MatchboxReweightBase.h
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// -*- C++ -*-
//
// MatchboxReweightBase.h is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2019 The Herwig Collaboration
//
// Herwig is licenced under version 3 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef HERWIG_MatchboxReweightBase_H
#define HERWIG_MatchboxReweightBase_H
//
// This is the declaration of the MatchboxReweightBase class.
//
#include "ThePEG/Handlers/HandlerBase.h"
#include "ThePEG/Handlers/StandardXComb.h"
namespace Herwig {
using namespace ThePEG;
/**
* \ingroup Matchbox
* \author Simon Platzer
*
* \brief MatchboxReweightBase is the base class
* for reweighting MatchboxMEBase matrix elements
* as |M|^2 ( w_1 + ... + w_n )
*
*/
class MatchboxReweightBase: public HandlerBase {
public:
/**
* Clone this reweight.
*/
Ptr<MatchboxReweightBase>::ptr cloneMe() const {
return dynamic_ptr_cast<Ptr<MatchboxReweightBase>::ptr>(clone());
}
/**
* Clone the dependencies, using a given prefix.
*/
virtual void cloneDependencies(const std::string& prefix = "");
/**
* Set the XComb object.
*/
virtual void setXComb(tStdXCombPtr) = 0;
/**
* Return true, if applies to the process in the xcomb.
*/
virtual bool apply() const = 0;
/**
* Inform this matrix element that a new phase space
* point is about to be generated, so all caches should
* be flushed.
*/
virtual void flushCaches() = 0;
/**
* Evaluate the reweight.
*/
virtual double evaluate() const = 0;
/**
* Set veto scales on the particles at the given
* SubProcess which has been generated using this
* matrix element.
*/
virtual void setVetoScales(tSubProPtr) const {}
public:
/**
* Dump the setup to an ostream
*/
virtual void print(ostream&) const {}
/**
* Print debug information on the last event
*/
virtual void printLastEvent(ostream&) 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);
//@}
/**
* The standard Init function used to initialize the interfaces.
* Called exactly once for each class by the class description system
* before the main function starts or
* when this class is dynamically loaded.
*/
static void Init();
// If needed, insert declarations of virtual function defined in the
// InterfacedBase class here (using ThePEG-interfaced-decl in Emacs).
private:
/**
* The assignment operator is private and must never be called.
* In fact, it should not even be implemented.
*/
MatchboxReweightBase & operator=(const MatchboxReweightBase &) = delete;
};
}
#endif /* HERWIG_MatchboxReweightBase_H */

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