MadGraphDummyProcess.cpp

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/*
 *  CepGen: a central exclusive processes event generator
 *  Copyright (C) 2020-2023  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/>.
 */
 
// This file allows to link the MadGraph interfacing module without any process
// generation performed by MG5_aMC.
// Include it in your source file prior to any linking with libCepGenMadGraph.
 
#include "CepGenAddOns/MadGraphWrapper/MadGraphProcess.h"
#include "CepGenAddOns/MadGraphWrapper/MadGraphProcessFactory.h"
 
namespace cepgen {
  class MadGraphDummyProcess : public MadGraphProcess {
  public:
    using MadGraphProcess::MadGraphProcess;
 
    double eval() override { return 0.; }
    void initialise(const std::string&) override {}
    const std::vector<Momentum>& momenta() override { return momenta_; }
 
  private:
    std::vector<Momentum> momenta_;
  };
}  // namespace cepgen
REGISTER_MG5AMC_PROCESS("dummy", MadGraphDummyProcess);