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EvtD0gammaDalitz.hh
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/***********************************************************************
* Copyright 1998-2020 CERN for the benefit of the EvtGen authors *
* *
* This file is part of EvtGen. *
* *
* EvtGen 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 *
* (at your option) any later version. *
* *
* EvtGen 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 EvtGen. If not, see <https://www.gnu.org/licenses/>. *
***********************************************************************/
#ifndef __EVTD0GAMMADALITZ_HH__
#define __EVTD0GAMMADALITZ_HH__
#include "EvtGenBase/EvtCyclic3.hh"
#include "EvtGenBase/EvtDalitzReso.hh"
#include "EvtGenBase/EvtDecayAmp.hh"
#include "EvtGenBase/EvtFlatte.hh"
#include "EvtGenBase/EvtSpinType.hh"
#include <vector>
class EvtParticle;
class EvtD0gammaDalitz : public EvtDecayAmp {
private:
int _d1;
int _d2;
int _d3;
bool _isKsPiPi;
// Useful constants.
static const EvtSpinType::spintype& _SCALAR;
static const EvtSpinType::spintype& _VECTOR;
static const EvtSpinType::spintype& _TENSOR;
static const EvtDalitzReso::CouplingType& _EtaPic;
static const EvtDalitzReso::CouplingType& _PicPicKK;
static const EvtDalitzReso::NumType& _RBW;
static const EvtDalitzReso::NumType& _GS;
static const EvtDalitzReso::NumType& _KMAT;
static const EvtCyclic3::Pair& _AB;
static const EvtCyclic3::Pair& _AC;
static const EvtCyclic3::Pair& _BC;
// Values to be read or computed based on values in the evt.pdl file.
// IDs of the relevant particles.
EvtId _BP;
EvtId _BM;
EvtId _B0;
EvtId _B0B;
EvtId _D0;
EvtId _D0B;
EvtId _KM;
EvtId _KP;
EvtId _K0;
EvtId _K0B;
EvtId _KL;
EvtId _KS;
EvtId _PIM;
EvtId _PIP;
// Flavor of the B mother.
EvtId _bFlavor;
// Masses of the relevant particles.
double _mD0;
double _mKs;
double _mPi;
double _mK;
void readPDGValues();
void reportInvalidAndExit() const;
EvtComplex dalitzKsPiPi( const EvtDalitzPoint& point ) const;
EvtComplex dalitzKsKK( const EvtDalitzPoint& point ) const;
public:
std::string getName() override;
EvtDecayBase* clone() override;
void init() override;
void initProbMax() override;
void decay( EvtParticle* p ) override;
};
#endif

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