PDFCuts.h

// -*- C++ -*-
//
// PDFCuts.h is a part of ThePEG - Toolkit for HEP Event Generation
// Copyright (C) 1999-2007 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_PDFCuts_H
#define ThePEG_PDFCuts_H
// This is the declaration of the PDFCuts class.

#include "ThePEG/Config/ThePEG.h"
#include "ThePEG/Utilities/Interval.h"
#include "ThePEG/Cuts/Cuts.fh"

namespace ThePEG {

class PDFCuts {

public:

  PDFCuts() : theSMax() {}

  PDFCuts(const Interval<double> & newL,
          const SInterval & newScale, const Energy2 & newSMax) 
    : theL(newL), theScale(newScale), theSMax(newSMax) {}

  PDFCuts(const Cuts &, bool first, const SInterval & S,
          const SInterval & sHat);

  PDFCuts(const Cuts &, bool first, Energy maxEnergy);

public:

  double lMin() const { return theL.lower(); }


  double lMax() const { return theL.upper(); }

  double xMin() const { return exp(-lMax()); }


  double xMax() const { return exp(-lMin()); }


  Energy2 scaleMin() const { return theScale.lower(); }


  Energy2 scaleMax() const { return theScale.upper(); }


  Energy2 scaleMax(double x) const { return min(scaleMax(), sMax()*x); }


  Energy2 scaleMaxL(double l) const { return scaleMax(exp(-l)); }


  Energy2 sMax() const { return theSMax; }



private:

  Interval<double> theL;

  SInterval theScale;

  Energy2 theSMax;

};

}

#endif /* ThePEG_PDFCuts_H */

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