ShowerAlphaQED.h

// -*- C++ -*-
//
// ShowerAlphaQED.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_ShowerAlphaQED_H
#define HERWIG_ShowerAlphaQED_H
//
// This is the declaration of the ShowerAlphaQED class.
//
 
#include "Herwig/Shower/ShowerAlpha.h"
 
namespace Herwig {
 
using namespace ThePEG;
 
class ShowerAlphaQED: public ShowerAlpha {
 
public:
 
  ShowerAlphaQED() : ShowerAlpha(), _alpha(1./137.), couplingSource_(1)
  {}
 
public:
 
  virtual double value(const Energy2 scale) const;
 
  virtual double overestimateValue() const;
 
  virtual double ratio(const Energy2 scale,double factor=1.) const;
  
public:
 
  void persistentOutput(PersistentOStream & os) const;
 
  void persistentInput(PersistentIStream & is, int version);
 
  static void Init();
 
protected:
 
  inline virtual IBPtr clone() const {return new_ptr(*this);}
 
  inline virtual IBPtr fullclone() const {return new_ptr(*this);}
 
protected:
 
  virtual void doinit();
 
private:
 
  static ClassDescription<ShowerAlphaQED> initShowerAlphaQED;
 
  ShowerAlphaQED & operator=(const ShowerAlphaQED &) = delete;
 
private:
 
  double _alpha; 
 
  unsigned int couplingSource_;
};
 
}
 
#include "ThePEG/Utilities/ClassTraits.h"
 
namespace ThePEG {
 
template <>
struct BaseClassTrait<Herwig::ShowerAlphaQED,1> {
  typedef Herwig::ShowerAlpha NthBase;
};
 
template <>
struct ClassTraits<Herwig::ShowerAlphaQED>
  : public ClassTraitsBase<Herwig::ShowerAlphaQED> {
  static string className() { return "Herwig::ShowerAlphaQED"; }
  static string library() { return "HwShower.so"; }
};
 
}
 
#endif /* HERWIG_ShowerAlphaQED_H */