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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 EVTRARELBTOLLLFFGUTSCHE_HH
0022 #define EVTRARELBTOLLLFFGUTSCHE_HH 1
0023 
0024 // Include files
0025 
0026 /** @class EvtRareLbToLllFF EvtRareLbToLllFF.hh EvtGenModels/EvtRareLbToLllFF.hh
0027  *
0028  *
0029  *  @author Michal Kreps
0030  *  @date   2014-10-21
0031  */
0032 
0033 #include "EvtGenBase/EvtIdSet.hh"
0034 #include "EvtGenBase/EvtParticle.hh"
0035 
0036 #include "EvtGenModels/EvtRareLbToLllFFBase.hh"
0037 
0038 #include <map>
0039 #include <string>
0040 
0041 class EvtRareLbToLllFFGutsche : public EvtRareLbToLllFFBase {
0042   public:
0043     void init() override;
0044 
0045     void getFF( EvtParticle* parent, EvtParticle* lambda,
0046                 EvtRareLbToLllFFBase::FormFactors& FF ) override;
0047 
0048   private:
0049     double formFactorParametrization( double s, double f0, double a, double b );
0050 
0051     double fVconsts[3][3];
0052     double fAconsts[3][3];
0053     double fTVconsts[3][3];
0054     double fTAconsts[3][3];
0055 
0056     static EvtIdSet fParents;
0057     static EvtIdSet fDaughters;
0058 };
0059 
0060 #endif    // EVTRARELBTOLLLFF_HH