| 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // |
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| 27 | // $Id: G4QFragmentation.hh,v 1.1 2009/11/16 18:16:04 mkossov Exp $ |
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| 28 | // GEANT4 tag $Name: geant4-09-03-cand-01 $ |
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| 29 | // |
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| 30 | // ----------------------------------------------------------------------------- |
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| 31 | // GEANT 4 class header file |
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| 32 | // |
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| 33 | // History: |
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| 34 | // Created by Mikhail Kossov, October 2006 |
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| 35 | // CHIPS QGS fragmentation class |
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| 36 | // For comparison mirror member functions are taken from G4 classes: |
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| 37 | // G4QGSParticipants |
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| 38 | // G4QGSModels |
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| 39 | // G4ExcitedStringDecay |
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| 40 | // ----------------------------------------------------------------------------- |
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| 41 | // Short description: CHIPS string fragmentation class |
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| 42 | // ----------------------------------------------------------------------------- |
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| 43 | // |
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| 44 | #ifndef G4QFragmentation_h |
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| 45 | #define G4QFragmentation_h 1 |
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| 46 | |
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| 47 | #include "globals.hh" |
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| 48 | #include "G4LorentzVector.hh" |
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| 49 | #include "Randomize.hh" |
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| 50 | #include "G4QNucleus.hh" |
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| 51 | #include "G4Quasmon.hh" |
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| 52 | #include "G4QHadronVector.hh" |
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| 53 | #include "G4QEnvironment.hh" |
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| 54 | #include "G4QInteractionVector.hh" |
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| 55 | #include "G4QProbability.hh" |
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| 56 | #include "G4QPartonPairVector.hh" |
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| 57 | #include "G4QuasiFreeRatios.hh" |
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| 58 | #include "G4QDiffractionRatio.hh" |
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| 59 | #include "G4QStringVector.hh" |
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| 60 | |
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| 61 | class G4QFragmentation |
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| 62 | { |
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| 63 | public: |
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| 64 | G4QFragmentation(const G4QNucleus& aNucleus, const G4QHadron& aPrimary); |
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| 65 | ~G4QFragmentation(); |
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| 66 | |
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| 67 | G4QHadronVector* Fragment(); // Calls Breeder & fragments Quasmons inside ResidualNucleus |
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| 68 | |
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| 69 | // Static functions |
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| 70 | static void SetParameters(G4int nC, G4double strTens, G4double tubeDens, G4double SigPt); |
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| 71 | |
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| 72 | protected: |
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| 73 | G4bool ExciteDiffParticipants(G4QHadron* aPartner, G4QHadron* bPartner) const; //@@Once |
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| 74 | G4bool ExciteSingDiffParticipants(G4QHadron* aPartner, G4QHadron* bPartner) const;//@@Onc |
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| 75 | std::pair<G4int,G4int> ReducePair(G4int P1, G4int P2) const; // Reduce Q-pairs to singles |
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| 76 | void Breeder(); // String fragmentation algoritm, which makes Hadrons & Quasmons from Str |
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| 77 | // @@ At present always SingleDiffractive, so this is a fake member function |
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| 78 | G4bool IsSingleDiffractive() {G4bool r=false; if(G4UniformRand()<1.) r=true; return r;} |
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| 79 | G4int SumPartonPDG(G4int PDG1, G4int PFG2) const; |
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| 80 | G4double ChooseX(G4double Xmin, G4double Xmax) const; |
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| 81 | G4ThreeVector GaussianPt(G4double widthSquare, G4double maxPtSquare) const; |
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| 82 | G4int AnnihilationOrder(G4int LS, G4int MS, G4int uP, G4int mP, G4int sP, G4int nP); |
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| 83 | void SwapPartons(); // Try to swap partons of strings, if one of strings has negative M2 |
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| 84 | |
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| 85 | private: |
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| 86 | enum {SOFT, DIFFRACTIVE}; |
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| 87 | // static model parameters |
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| 88 | static G4int nCutMax; // Maximum number of Soft Cuts |
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| 89 | static G4double stringTension; // String Tension to absorb energy |
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| 90 | static G4double tubeDensity; // Nucleon density in the FluxTube |
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| 91 | static G4double widthOfPtSquare; // width^2 of pt(StringExcitation) |
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| 92 | |
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| 93 | // Body |
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| 94 | G4QNucleus theNucleus; // TargetNucleus moving fromLStoCM |
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| 95 | G4QStringVector strings; // Vector of created strings |
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| 96 | G4QuasmonVector theQuasmons; // Strings converter to Quasmons |
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| 97 | G4QHadronVector* theResult; // Pointer to the OUTPUT Result |
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| 98 | G4double maxEn; // Energy absorbed by the nucleus |
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| 99 | G4double maxNuc; // #0fNucleons in the Flux Tube |
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| 100 | G4QuasiFreeRatios* theQuasiElastic; // For CHIPS Quasi-Elastic |
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| 101 | G4QDiffractionRatio* theDiffraction; // For CHIPS Diffraction |
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| 102 | G4QCHIPSWorld* theWorld; // Pointer to the CHIPS World |
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| 103 | }; |
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| 104 | |
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| 105 | #endif |
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