ShowerAlpha.h

// -*- C++ -*-
//
// ShowerAlpha.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_ShowerAlpha_H
#define HERWIG_ShowerAlpha_H
//
// This is the declaration of the ShowerAlpha class.
//
 
#include "ThePEG/Interface/Interfaced.h"
#include "ShowerAlpha.fh"
 
namespace Herwig {
 
using namespace ThePEG;
 
class ShowerAlpha: public Interfaced {
 
public:
 
  ShowerAlpha() : _scaleFactor( 1.0 ) {}
 
public:
 
  virtual double value(const Energy2 scale) const = 0;
 
  virtual double overestimateValue() const = 0;
 
  virtual double ratio(const Energy2 scale,double factor=1.) const = 0;
 
  double scaleFactor() const {return _scaleFactor;}
 
  virtual inline double showerValue(const Energy2 scale) const {
    return value(scale);
  }
 
  virtual inline double showerOverestimateValue() const {
    return overestimateValue();
  }
 
  virtual inline double showerRatio(const Energy2 scale,double factor=1.) const {
    return ratio(scale,factor);
  }
 
  virtual void initialize () {}
 
public:
 
  void persistentOutput(PersistentOStream & os) const;
 
  void persistentInput(PersistentIStream & is, int version);
 
  static void Init();
 
private:
 
  ShowerAlpha & operator=(const ShowerAlpha &) = delete;
 
private:
 
  double _scaleFactor;
 
};
 
}
 
#endif /* HERWIG_ShowerAlpha_H */