PartonsKTPhaseSpaceGenerator.h

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/*
 *  CepGen: a central exclusive processes event generator
 *  Copyright (C) 2016-2024  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_PartonsKTPhaseSpaceGenerator_h
#define CepGen_Process_PartonsKTPhaseSpaceGenerator_h
 
#include "CepGen/Process/PartonsPhaseSpaceGenerator.h"
 
namespace cepgen {
  class PartonsKTPhaseSpaceGenerator final : public PartonsPhaseSpaceGenerator {
  public:
    explicit PartonsKTPhaseSpaceGenerator(const ParametersList&);
 
    static ParametersDescription description();
 
    bool ktFactorised() const override { return true; }
    bool generatePartonKinematics() override;
    double fluxes() const override;
 
  private:
    void initialise() override;
 
    const bool log_part_virt_;
    // mapped variables
    double m_qt1_{0.};      
    double m_phi_qt1_{0.};  
    double m_qt2_{0.};      
    double m_phi_qt2_{0.};  
  };
}  // namespace cepgen
 
#endif