KTFlux.h

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/*
 *  CepGen: a central exclusive processes event generator
 *  Copyright (C) 2023  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_KTFluxes_KTFlux_h
#define CepGen_KTFluxes_KTFlux_h
 
#include "CepGen/Physics/PartonFlux.h"
 
namespace cepgen {
  class KTFlux : public PartonFlux {
  public:
    explicit KTFlux(const ParametersList&);
 
    static ParametersDescription description();
 
    virtual double fluxQ2(double x, double kt2, double q2) const;
    virtual double fluxMX2(double x, double kt2, double mf2) const;
 
    bool ktFactorised() const override final { return true; }
 
  protected:
    static constexpr double kMinKTFlux{1.e-20};
  };
}  // namespace cepgen
 
#endif