+++ /dev/null
-///////////////////////////////////////////////////////////////////////////
-//
-// Copyright 2010
-//
-// This file is part of starlight.
-//
-// starlight 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.
-//
-// starlight 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 starlight. If not, see <http://www.gnu.org/licenses/>.
-//
-///////////////////////////////////////////////////////////////////////////
-//
-// File and Version Information:
-// $Rev:: $: revision of last commit
-// $Author:: $: author of last commit
-// $Date:: $: date of last commit
-//
-// Description:
-//
-//
-//
-///////////////////////////////////////////////////////////////////////////
-
-
-#ifndef PHOTONNUCLEUSCROSSSECTION_H
-#define PHOTONNUCLEUSCROSSSECTION_H
-
-
-#include "starlightconstants.h"
-#include "beambeamsystem.h"
-
-
-class photonNucleusCrossSection {
-
-public:
-
- photonNucleusCrossSection(const beamBeamSystem& bbsystem);
- ~photonNucleusCrossSection();
-
- double slopeParameter () const { return _slopeParameter; } ///< returns slope of t-distribution [(GeV/c)^{-2}]
- double getChannelMass () const { return _channelMass; } ///< returns mass of the produced system [GeV/c^2]
- double getBNORM () const { return _BNORM; }
- double luminosity () const { return _luminosity; } ///< returns luminosity [10^{26} cm^{-2} sec^{-1}]
- beamBeamSystem getbbs () const { return _bbs; } ///< returns beamBeamSystem
- double vmPhotonCoupling() const { return _vmPhotonCoupling; } ///< vectormeson-photon coupling constant f_v / 4 pi (cf. Eq. 10 in KN PRC 60 (1999) 014903)
- double getDefaultC () const { return _defaultC; }
- double maxPhotonEnergy () const { return _maxPhotonEnergy; } ///< returns max photon energy in lab frame [GeV] (for vectormesons only)
-
- void crossSectionCalculation(const double bwnormsave);
- // Will think about it...For VMs we just calculate it
- // So just use the wide or narrow constructor to calculate it
- // wide/narrow will inherit this.
- double getcsgA(const double Egamma,
- const double W);
- double photonFlux(const double Egamma);
- double sigmagp(const double Wgp);
- double sigma_A(const double sig_N);
- double sigma_N(const double Wgp);
- double breitWigner(const double W,
- const double C);
- double nepoint(const double Egamma,
- const double bmin);
-
-protected:
- const unsigned int _nWbins;
- const unsigned int _nYbins;
-
- const double _wMin;
- const double _wMax;
- const double _yMax;
-
- const double _beamLorentzGamma;
-
-private:
-
- beamBeamSystem _bbs;
-
- // copied from inputParameters
- double _protonEnergy;
- starlightConstants::particleTypeEnum _particleType;
- int _beamBreakupMode; ///< breakup mode for beam particles
- bool _coherentProduction; ///< if true, production is coherent, else incoherent
- double _incoherentFactor; ///< allows to scale the incoherent contribution in vector meson production
- int _productionMode;
- int _sigmaNucleus;
-
- // locally defined parameters
- double _slopeParameter; ///< slope of t-distribution [(GeV/c)^{-2}]
- double _vmPhotonCoupling; ///< vectormeson-photon coupling constant f_v / 4 pi (cf. Eq. 10 in KN PRC 60 (1999) 014903)
- double _ANORM;
- double _BNORM;
- double _defaultC;
- double _luminosity; ///< luminosity [10^{26} cm^{-2} sec^{-1}]
- double _maxPhotonEnergy; ///< max photon energy in lab frame [GeV] (for vectormesons only)
- double _width; ///< width of the produced system [GeV/c^2]
- double _channelMass; ///< mass of the produced system [GeV/c^2]
-
-};
-
-
-#endif // PHOTONNUCLEUSCROSSSECTION_H