RunningCoupling.h

// -*- C++ -*-
//
// RunningCoupling.h is a part of ThePEG - Toolkit for HEP Event Generation
// Copyright (C) 1999-2019 Leif Lonnblad, (C) 2009 Simon Platzer
//
// ThePEG is licenced under version 3 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef ThePEG_RunningCoupling_H
#define ThePEG_RunningCoupling_H
// This is the declaration of the RunningCoupling class.
 
#include "ThePEG/Interface/Interfaced.h"
#include "ThePEG/Repository/EventGenerator.h"
#include "StandardModelBase.fh"
 
namespace ThePEG {
 
class RunningCoupling: public Interfaced {
 
public:
 
  RunningCoupling () : theScaleFactor(1.) {}
 
 
  virtual double value (Energy2 scale, const StandardModelBase & sm) const = 0;
 
  virtual unsigned int nloops () const { return 0; }
 
 
  double value(Energy2 scale) const {
    return value(scale,*(generator()->standardModel()));
  }
 
  virtual double overestimateValue (Energy2 scale) const {
    return value(scale);
  }
 
  virtual double ratioToOverestimate (Energy2) const {
    return 1.;
  }
 
  double scaleFactor () const { return theScaleFactor; }
 
public:
 
  void persistentOutput(PersistentOStream & os) const;
 
  void persistentInput(PersistentIStream & is, int version);
 
  static void Init();
 
private:
 
  static AbstractClassDescription<RunningCoupling> initRunningCoupling;
 
  RunningCoupling & operator=(const RunningCoupling &) = delete;
 
  double theScaleFactor;
 
};
 
template <>
struct BaseClassTrait<RunningCoupling,1>: public ClassTraitsType {
  typedef Interfaced NthBase;
};
 
template <>
struct ClassTraits<RunningCoupling>: public ClassTraitsBase<RunningCoupling> {
  static string className() { return "ThePEG::RunningCoupling"; }
};
 
}
 
#endif /* ThePEG_RunningCoupling_H */