include/EvtGenModels/EvtPartWave.hh

0001
0002 /***********************************************************************
0003 * Copyright 1998-2020 CERN for the benefit of the EvtGen authors       *
0004 *                                                                      *
0005 * This file is part of EvtGen.                                         *
0006 *                                                                      *
0007 * EvtGen is free software: you can redistribute it and/or modify       *
0008 * it under the terms of the GNU General Public License as published by *
0009 * the Free Software Foundation, either version 3 of the License, or    *
0010 * (at your option) any later version.                                  *
0011 *                                                                      *
0012 * EvtGen is distributed in the hope that it will be useful,            *
0013 * but WITHOUT ANY WARRANTY; without even the implied warranty of       *
0014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
0015 * GNU General Public License for more details.                         *
0016 *                                                                      *
0017 * You should have received a copy of the GNU General Public License    *
0018 * along with EvtGen.  If not, see <https://www.gnu.org/licenses/>.     *
0019 ***********************************************************************/
0020
0021 #ifndef EVTPARTWAVE_HH
0022 #define EVTPARTWAVE_HH
0023
0024 #include "EvtGenBase/EvtDecayAmp.hh"
0025 #include "EvtGenBase/EvtEvalHelAmp.hh"
0026 #include "EvtGenBase/EvtId.hh"
0027
0028 #include <memory>
0029
0030 class EvtParticle;
0031 class EvtEvalHelAmp;
0032
0033 // Description:Decay model for implementation of generic 2 body
0034 //             decay specified by the partial waves amplitudes
0035
0036 class EvtPartWave : public EvtDecayAmp {
0037   public:
0038     std::string getName() override;
0039     EvtDecayBase* clone() override;
0040
0041     void init() override;
0042     void initProbMax() override;
0043
0044     void decay( EvtParticle* p ) override;
0045
0046   private:
0047     void fillHelicity( int* lambda2, int n, int J2 );
0048
0049     std::unique_ptr<EvtEvalHelAmp> _evalHelAmp;
0050 };
0051
0052 #endif