git://git.uio.no / u / mrichter / AliRoot.git / blame
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1 | /////////////////////////////////////////////////////////////////////////// |
| 2 | // | |
| 3 | // Copyright 2010 | |
| 4 | // | |
| 5 | // This file is part of starlight. | |
| 6 | // | |
| 7 | // starlight is free software: you can redistribute it and/or modify | |
| 8 | // it under the terms of the GNU General Public License as published by | |
| 9 | // the Free Software Foundation, either version 3 of the License, or | |
| 10 | // (at your option) any later version. | |
| 11 | // | |
| 12 | // starlight is distributed in the hope that it will be useful, | |
| 13 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 | // GNU General Public License for more details. | |
| 16 | // | |
| 17 | // You should have received a copy of the GNU General Public License | |
| 18 | // along with starlight. If not, see <http://www.gnu.org/licenses/>. | |
| 19 | // | |
| 20 | /////////////////////////////////////////////////////////////////////////// | |
| 21 | // | |
| 22 | // File and Version Information: | |
| 23 | // $Rev:: $: revision of last commit | |
| 24 | // $Author:: $: author of last commit | |
| 25 | // $Date:: $: date of last commit | |
| 26 | // | |
| 27 | // Description: | |
| 28 | // this class covers a coliding beam system SK | |
| 29 | // | |
| 30 | // | |
| 31 | // | |
| 32 | /////////////////////////////////////////////////////////////////////////// | |
| 33 | ||
| 34 | ||
| 35 | #ifndef BEAMBEAMSYSTEM_H | |
| 36 | #define BEAMBEAMSYSTEM_H | |
| 37 | ||
| 38 | ||
| 39 | #include "nucleus.h" | |
| 40 | #include "beam.h" | |
| 41 | #include <vector> | |
| 42 | ||
| 43 | class beamBeamSystem | |
| 44 | { | |
| 45 | ||
| 46 | public: | |
| 47 | ||
| 48 | beamBeamSystem(const beam& beam1, | |
| 49 | const beam& beam2); | |
| 50 | beamBeamSystem(); | |
| 51 | ~beamBeamSystem(); | |
| 52 | ||
| 53 | const beam& beam1() const { return _beam1; } ///< returns beam particle 1 | |
| 54 | const beam& beam2() const { return _beam2; } ///< returns beam particle 2 | |
| 55 | ||
| 56 | // double getluminosity(); | |
| 57 | double probabilityOfBreakup(const double D) const; | |
| 58 | ||
| 59 | double cmsBoost() const { return _cmsBoost; } | |
| 60 | ||
| 61 | double beamLorentzGamma() const { return _beamLorentzGamma; } | |
| 62 | ||
| 63 | void init(); | |
| 64 | ||
| 65 | private: | |
| 66 | void generateBreakupProbabilities(); | |
| 67 | // int _ibreakup;//temporary solution until read in parameters are done | |
| 68 | double probabilityOfHadronBreakup(const double impactparameter); | |
| 69 | double probabilityOfPhotonBreakup(const double impactparameter, const int mode); | |
| 70 | ||
| 71 | double _pHadronBreakup; | |
| 72 | double _pPhotonBreakup; | |
| 73 | //inputParameters inputbbs; | |
| 74 | // double luminosity; | |
| 75 | ||
| 76 | double _beamLorentzGamma; ///< Lorentz gamma factor of beams in collider frame | |
| 77 | int _beamBreakupMode; ///< \brief breakup mode for beam particles | |
| 78 | ///< | |
| 79 | ///< 1 = hard sphere nuclei (b > 2R), | |
| 80 | ///< 2 = both nuclei break up (XnXn), | |
| 81 | ///< 3 = a single neutron from each nucleus (1n1n), | |
| 82 | ///< 4 = neither nucleon breaks up (with b > 2R), | |
| 83 | ///< 5 = no hadronic break up (similar to option 1, but with the actual hadronic interaction) | |
| 84 | ||
| 85 | beam _beam1; ///< beam particle 1 | |
| 86 | beam _beam2; ///< beam particle 2 | |
| 87 | ||
| 88 | double _cmsBoost; ///< Rapidity boost of the CMS wrt the lab system | |
| 89 | ||
| 90 | std::vector<double> _breakupProbabilities; ///< Vector containing breakup probabilities for impact parameters | |
| 91 | double _breakupImpactParameterStep; ///< Step size in the calculation of the breakup probs | |
| 92 | double _breakupCutOff; ///< Cut off for minimum impact parameter probability | |
| 93 | }; | |
| 94 | ||
| 95 | ||
| 96 | #endif // BEAMBEAMSYSTEM_H |