FortranFactorisedProcess.h

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/*
 *  CepGen: a central exclusive processes event generator
 *  Copyright (C) 2018-2024  Laurent Forthomme
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef CepGen_Process_FortranFactorisedProcess_h
#define CepGen_Process_FortranFactorisedProcess_h
 
#include "CepGen/Process/FactorisedProcess.h"
 
namespace cepgen {
  namespace proc {
    class FortranFactorisedProcess : public FactorisedProcess {
    public:
      explicit FortranFactorisedProcess(const ParametersList&, const std::function<double(void)>& func);
      ProcessPtr clone() const override { return ProcessPtr(new FortranFactorisedProcess(*this)); }
 
      static ParametersList kProcParameters;
 
    private:
      void prepareFactorisedPhaseSpace() override final;
      double computeFactorisedMatrixElement() override final;
 
      const std::function<double(void)> func_;  
 
      // mapped variables
      double m_y1_{0.};           
      double m_y2_{0.};           
      double m_pt_diff_{0.};      
      double m_phi_pt_diff_{0.};  
    };
  }  // namespace proc
}  // namespace cepgen
 
#endif