1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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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: hadr-chips-V09-03-08 $ |
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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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