/data/refman/pasoursint/CMSSW_4_1_8_patch9/src/GeneratorInterface/ExhumeInterface/interface/DiPhoton.h

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//-*-c++-*-
//-*-DiPhoton.h-*-
//   Written by James Monk and Andrew Pilkington
#ifndef DI_PHOTON_HH
#define DI_PHOTON_HH

#include "GeneratorInterface/ExhumeInterface/interface/TwoSpace.h"

namespace Exhume{
  class DiPhoton : public TwoSpace{

  public:
    DiPhoton(const edm::ParameterSet&);
   
    //declare inherited functions
    double SubProcess();
    void LIPS2Amp();
    void Amp2LIPS();
  
  private:
    double MatrixElement();
    //internal functions
 
    //internal Parameters
    double t_;//internal 
   
    double PI2, Inv64PI2;
    int Nc;
    double MatFact;
    int Nup;
    int Ndown;
  };
}
#endif