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 1.2 2006/12/12 11:02:22 mkossov Exp $ |
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28 | // GEANT4 tag $Name: $ |
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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 | // |
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42 | #ifndef G4QFragmentation_h |
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43 | #define G4QFragmentation_h 1 |
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44 | |
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45 | #include "globals.hh" |
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46 | #include "G4QNucleus.hh" |
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47 | #include "Randomize.hh" |
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48 | #include "G4QHadronVector.hh" |
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49 | #include "G4ShortLivedConstructor.hh" |
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50 | #include "G4QInteractionVector.hh" |
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51 | #include "G4QPomeron.hh" |
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52 | #include "G4QPartonPairVector.hh" |
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53 | #include "G4QStringVector.hh" |
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54 | |
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55 | class G4QFragmentation |
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56 | { |
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57 | public: |
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58 | G4QFragmentation(); |
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59 | G4QFragmentation(const G4QFragmentation &right); |
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60 | const G4QFragmentation& operator=(const G4QFragmentation &right); |
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61 | virtual ~G4QFragmentation(); |
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62 | |
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63 | int operator==(const G4QFragmentation &right) const; |
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64 | int operator!=(const G4QFragmentation &right) const; |
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65 | |
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66 | G4QHadronVector* Scatter(const G4QNucleus& theNucleus, const G4QHadron& thePrimary); |
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67 | |
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68 | void InitModel(const G4QNucleus& Nucleus, const G4QHadron& Projectile); |
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69 | |
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70 | void Init(G4double theZ, G4double theA) |
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71 | { |
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72 | if(!theNucleus) theNucleus = new G4QNucleus(G4int(theZ),G4int(theA-theZ+.0001)); |
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73 | theNucleus->InitByPDG(90000000+G4int(theZ)*1000+G4int(theA-theZ+.0001)); |
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74 | } |
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75 | |
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76 | void SetNucleus(G4QNucleus* aNucleus) {theNucleus=aNucleus;} |
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77 | G4QNucleus* GetWoundedNucleus() const {return theNucleus;} |
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78 | G4bool ExciteDiffParticipants(G4QHadron* aPartner, G4QHadron* bPartner) const; |
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79 | G4bool ExciteSingDiffParticipants(G4QHadron* aPartner, G4QHadron* bPartner) const; |
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80 | |
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81 | G4QString* BuildString(G4QPartonPair* aPair) |
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82 | {return new G4QString(aPair->GetParton1(),aPair->GetParton2(), aPair->GetDirection());} |
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83 | |
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84 | G4QStringVector* GetStrings(); |
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85 | G4QHadronVector* FragmentStrings(const G4QStringVector* theStrings); |
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86 | void DoLorentzBoost(G4ThreeVector aBoost) |
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87 | { |
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88 | if(theNucleus) theNucleus->DoLorentzBoost(aBoost); |
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89 | theBoost = aBoost; |
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90 | } |
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91 | |
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92 | G4QPartonPair* GetNextPartonPair(); |
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93 | void BuildInteractions(const G4QHadron& thePrimary); |
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94 | void StartPartonPairLoop() {;} // @@ (? M.K.) Function which is doing nothing |
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95 | |
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96 | // Static functions |
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97 | static void SetParameters(G4int nCM, G4double thresh, G4double QGSMth, G4double radNuc, |
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98 | G4double SigPt, G4double extraM, G4double minM); |
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99 | protected: |
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100 | G4QHadron* SelectInteractions(const G4QHadron &thePrimary); |
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101 | void SplitHadrons() |
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102 | {for(unsigned i=0; i<theInteractions.size(); i++) theInteractions[i]->SplitHadrons();} |
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103 | void PerformSoftCollisions(); |
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104 | void PerformDiffractiveCollisions(); |
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105 | G4bool IsSingleDiffractive() |
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106 | {G4bool result=false; if(G4UniformRand()<1.) result=true; return result;} |
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107 | G4bool EnergyAndMomentumCorrector(G4QHadronVector* Output, G4LorentzVector& TotaMom); |
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108 | G4double ChooseX(G4double Xmin, G4double Xmax) const; |
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109 | G4ThreeVector GaussianPt(G4double widthSquare, G4double maxPtSquare) const; |
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110 | |
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111 | private: |
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112 | // static model parameters |
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113 | static G4int nCutMax; |
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114 | static G4double ThersholdParameter; |
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115 | static G4double QGSMThershold; |
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116 | static G4double theNucleonRadius; |
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117 | // Parameters of diffractional fragmentation |
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118 | static G4double widthOfPtSquare; // width^2 of pt for string excitation |
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119 | static G4double minExtraMass; // minimum excitation mass |
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120 | static G4double minmass; // mean pion transverse mass; used for Xmin |
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121 | |
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122 | // Body |
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123 | G4QInteractionVector theInteractions; |
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124 | G4QHadronVector theTargets; |
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125 | G4QPartonPairVector thePartonPairs; |
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126 | |
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127 | G4int ModelMode; |
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128 | G4ThreeVector theBoost; // init as zero 3-vector (@@ M.K.) |
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129 | G4QNucleus* theNucleus; // init as zero (0) |
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130 | G4ThreeVector theCurrentVelocity; // init as zero 3-vector (@@ M.K.) |
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131 | |
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132 | enum {SOFT, DIFFRACTIVE}; |
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133 | }; |
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134 | |
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135 | #endif |
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136 | |
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137 | |
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