MEQQ2QQ3.h

// -*- C++ -*-
//
// MEQQ2QQ3.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_MEQQ2QQ_H
#define ThePEG_MEQQ2QQ_H
// This is the declaration of the MEQQ2QQ class.

#include "ThePEG/MatrixElement/ME2to2QCD.h"
// #include "MEQQ2QQ.fh"
// #include "MEQQ2QQ.xh"

namespace ThePEG {

class MEQQ2QQ: public ME2to2QCD {

public:

  virtual double me2() const;

  virtual void getDiagrams() const;

  virtual Selector<const ColourLines *>
  colourGeometries(tcDiagPtr diag) const;

  virtual Selector<DiagramIndex> diagrams(const DiagramVector & dv) const;

protected:

  double colA() const
  {
    return (sqr(uHat()) + sqr(sHat()))/sqr(tHat());
  }


  double colB() const
  {
    return (sqr(tHat()) + sqr(sHat()))/sqr(uHat());
  }

public:

  static void Init();

protected:

  virtual IBPtr clone() const;

  virtual IBPtr fullclone() const;

private:

  static NoPIOClassDescription<MEQQ2QQ> initMEQQ2QQ;

  MEQQ2QQ & operator=(const MEQQ2QQ &);

};

}


namespace ThePEG {

template <>
struct BaseClassTrait<MEQQ2QQ,1>: public ClassTraitsType {
  typedef ME2to2QCD NthBase;
};

template <>
struct ClassTraits<MEQQ2QQ>: public ClassTraitsBase<MEQQ2QQ> {
  static string className() { return "ThePEG::MEQQ2QQ"; }
  static string library() { return "MEQCD.so"; }
};

}

#endif /* ThePEG_MEQQ2QQ_H */

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