include/EvtGenBase/EvtMRes.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 __EVTMRES_HH__
0022 #define __EVTMRES_HH__
0023
0024 #include "EvtGenBase/EvtMNode.hh"
0025
0026 class EvtMRes;
0027
0028 class EvtMLineShape {
0029   public:
0030     virtual ~EvtMLineShape(){};
0031
0032     void setres( EvtMRes* n ) { _node = n; }
0033     virtual EvtComplex shape( const vector<EvtVector4R>& product ) const = 0;
0034
0035     virtual EvtMLineShape* duplicate() const = 0;
0036
0037   protected:
0038     EvtMRes* _node;
0039 };
0040
0041 class EvtMRes : public EvtMNode {
0042   public:
0043     ~EvtMRes();
0044
0045     int getnchild() const override { return _children.size(); }
0046
0047     EvtComplex line( const vector<EvtVector4R>& product ) const override
0048     {
0049         return _lineshape->shape( product );
0050     }
0051
0052   protected:
0053     // store the child nodes
0054     vector<EvtMNode*> _children;
0055
0056     // store the parametrization amplitudes in some kind
0057     EvtSpinAmp _amp;
0058
0059     // store the lineshape of the resonance
0060     EvtMLineShape* _lineshape;
0061 };
0062
0063 #endif