[819] | 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 | // PDG fits, 1998 Review of Particle Properties, European Phys. J. 3(1998), 1 |
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| 28 | // ------------------------------------------------------------------- |
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| 29 | |
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| 30 | #include "globals.hh" |
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| 31 | #include "G4ios.hh" |
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| 32 | #include "G4XPDGTotal.hh" |
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| 33 | #include "G4KineticTrack.hh" |
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| 34 | #include "G4ParticleDefinition.hh" |
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| 35 | #include "G4DataVector.hh" |
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| 36 | #include "G4AntiProton.hh" |
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| 37 | #include "G4AntiNeutron.hh" |
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| 38 | #include "G4Proton.hh" |
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| 39 | #include "G4Neutron.hh" |
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| 40 | #include "G4PionPlus.hh" |
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| 41 | #include "G4PionMinus.hh" |
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| 42 | #include "G4Gamma.hh" |
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| 43 | #include "G4KaonMinus.hh" |
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| 44 | #include "G4KaonPlus.hh" |
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| 45 | |
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| 46 | const G4double G4XPDGTotal::_lowLimit = 3. * GeV; // 2.99999 * GeV; |
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| 47 | const G4double G4XPDGTotal::_highLimit = DBL_MAX; |
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| 48 | |
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| 49 | // Parameters of the PDG total cross-section fit (Rev. Particle Properties, 1998) |
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| 50 | // Columns are: lower and higher fit range, X, Y1, Y2 |
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| 51 | const G4int G4XPDGTotal::nFit = 5; |
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| 52 | // p p |
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| 53 | const G4double G4XPDGTotal::ppPDGFit[5] = { 3., 40000., 18.256, 60.19, 33.43 }; |
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| 54 | // n p |
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| 55 | const G4double G4XPDGTotal::npPDGFit[5] = { 3., 40., 18.256, 61.14, 29.80 }; |
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| 56 | // pi p |
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| 57 | const G4double G4XPDGTotal::pipPDGFit[5] = { 3., 40., 11.568, 27.55, 5.62 }; |
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| 58 | // K p |
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| 59 | const G4double G4XPDGTotal::KpPDGFit[5] = { 3., 40., 10.376, 15.57, 13.19 }; |
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| 60 | // K n |
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| 61 | const G4double G4XPDGTotal::KnPDGFit[5] = { 3., 40., 10.376, 14.29, 7.38 }; |
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| 62 | // gamma p |
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| 63 | const G4double G4XPDGTotal::gammapPDGFit[5] = { 3., 300., 0.0577, 0.1171, 0. }; |
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| 64 | //gamma gamma |
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| 65 | const G4double G4XPDGTotal::gammagammaPDGFit[5] = { 3., 300., 0.000156, 0.00032, 0. }; |
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| 66 | |
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| 67 | |
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| 68 | G4XPDGTotal::G4XPDGTotal() |
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| 69 | { |
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| 70 | std::pair<G4String,G4String> pp(G4Proton::ProtonDefinition()->GetParticleName(), |
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| 71 | G4Proton::ProtonDefinition()->GetParticleName()); |
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| 72 | std::pair<G4String,G4String> pn(G4Proton::ProtonDefinition()->GetParticleName(), |
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| 73 | G4Neutron::NeutronDefinition()->GetParticleName()); |
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| 74 | std::pair<G4String,G4String> piPlusp(G4PionPlus::PionPlusDefinition()->GetParticleName(), |
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| 75 | G4Proton::ProtonDefinition()->GetParticleName()); |
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| 76 | std::pair<G4String,G4String> piMinusp(G4PionMinus::PionMinusDefinition()->GetParticleName(), |
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| 77 | G4Proton::ProtonDefinition()->GetParticleName()); |
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| 78 | std::pair<G4String,G4String> KPlusp(G4KaonPlus::KaonPlusDefinition()->GetParticleName(), |
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| 79 | G4Proton::ProtonDefinition()->GetParticleName()); |
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| 80 | std::pair<G4String,G4String> KPlusn(G4KaonPlus::KaonPlusDefinition()->GetParticleName(), |
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| 81 | G4Neutron::NeutronDefinition()->GetParticleName()); |
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| 82 | std::pair<G4String,G4String> KMinusp(G4KaonMinus::KaonMinusDefinition()->GetParticleName(), |
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| 83 | G4Proton::ProtonDefinition()->GetParticleName()); |
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| 84 | std::pair<G4String,G4String> KMinusn(G4KaonMinus::KaonMinusDefinition()->GetParticleName(), |
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| 85 | G4Neutron::NeutronDefinition()->GetParticleName()); |
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| 86 | std::pair<G4String,G4String> gp(G4Gamma::GammaDefinition()->GetParticleName(), |
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| 87 | G4Proton::ProtonDefinition()->GetParticleName()); |
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| 88 | std::pair<G4String,G4String> gg(G4Gamma::GammaDefinition()->GetParticleName(), |
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| 89 | G4Gamma::GammaDefinition()->GetParticleName()); |
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| 90 | std::pair<G4String,G4String> nn(G4Neutron::NeutronDefinition()->GetParticleName(), |
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| 91 | G4Neutron::NeutronDefinition()->GetParticleName()); |
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| 92 | |
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| 93 | std::vector<G4double> nnData; |
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| 94 | std::vector<G4double> ppData; |
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| 95 | std::vector<G4double> pnData; |
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| 96 | std::vector<G4double> pipData; |
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| 97 | std::vector<G4double> KpData; |
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| 98 | std::vector<G4double> KnData; |
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| 99 | std::vector<G4double> gpData; |
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| 100 | std::vector<G4double> ggData; |
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| 101 | |
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| 102 | G4int i; |
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| 103 | for (i=0; i<2; i++) |
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| 104 | { |
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| 105 | nnData.push_back(ppPDGFit[i] * GeV); |
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| 106 | ppData.push_back(ppPDGFit[i] * GeV); |
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| 107 | pnData.push_back(npPDGFit[i] * GeV); |
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| 108 | pipData.push_back(pipPDGFit[i] * GeV); |
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| 109 | KpData.push_back(KpPDGFit[i] * GeV); |
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| 110 | KnData.push_back(KnPDGFit[i] * GeV); |
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| 111 | gpData.push_back(gammapPDGFit[i] * GeV); |
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| 112 | ggData.push_back(gammagammaPDGFit[i] * GeV); |
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| 113 | } |
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| 114 | for (i=2; i<nFit; i++) |
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| 115 | { |
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| 116 | nnData.push_back(ppPDGFit[i]); |
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| 117 | ppData.push_back(ppPDGFit[i]); |
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| 118 | pnData.push_back(npPDGFit[i]); |
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| 119 | pipData.push_back(pipPDGFit[i]); |
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| 120 | KpData.push_back(KpPDGFit[i]); |
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| 121 | KnData.push_back(KnPDGFit[i]); |
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| 122 | gpData.push_back(gammapPDGFit[i]); |
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| 123 | ggData.push_back(gammagammaPDGFit[i]); |
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| 124 | } |
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| 125 | |
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| 126 | xMap[pp] = ppData; |
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| 127 | xMap[pn] = pnData; |
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| 128 | xMap[piPlusp] = pipData; |
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| 129 | xMap[piMinusp] = pipData; |
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| 130 | xMap[KPlusp] = KpData; |
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| 131 | xMap[KPlusn] = KnData; |
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| 132 | xMap[KMinusp] = KpData; |
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| 133 | xMap[KMinusn] = KnData; |
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| 134 | xMap[gp] = gpData; |
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| 135 | xMap[gg] = ggData; |
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| 136 | xMap[nn] = nnData; |
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| 137 | } |
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| 138 | |
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| 139 | |
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| 140 | G4XPDGTotal::~G4XPDGTotal() |
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| 141 | { } |
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| 142 | |
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| 143 | |
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| 144 | G4bool G4XPDGTotal::operator==(const G4XPDGTotal &right) const |
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| 145 | { |
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| 146 | return (this == (G4XPDGTotal *) &right); |
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| 147 | } |
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| 148 | |
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| 149 | |
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| 150 | G4bool G4XPDGTotal::operator!=(const G4XPDGTotal &right) const |
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| 151 | { |
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| 152 | return (this != (G4XPDGTotal *) &right); |
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| 153 | } |
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| 154 | |
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| 155 | |
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| 156 | G4double G4XPDGTotal::CrossSection(const G4KineticTrack& trk1, |
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| 157 | const G4KineticTrack& trk2) const |
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| 158 | { |
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| 159 | G4double sigma = 0.; |
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| 160 | |
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| 161 | G4double sqrtS = (trk1.Get4Momentum() + trk2.Get4Momentum()).mag(); |
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| 162 | |
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| 163 | G4ParticleDefinition* def1 = trk1.GetDefinition(); |
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| 164 | G4ParticleDefinition* def2 = trk2.GetDefinition(); |
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| 165 | |
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| 166 | G4double enc1 = def1->GetPDGEncoding(); |
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| 167 | G4double enc2 = def2->GetPDGEncoding(); |
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| 168 | G4double coeff = -1.; |
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| 169 | if ( (enc1 < 0 && enc2 >0) || (enc2 < 0 && enc1 >0) ) coeff = 1.; |
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| 170 | |
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| 171 | // Order the pair: first is the lower mass particle, second is the higher mass one |
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| 172 | std::pair<G4String,G4String> trkPair(def1->GetParticleName(),def2->GetParticleName()); |
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| 173 | |
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| 174 | if (def1->GetPDGMass() > def2->GetPDGMass()) |
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| 175 | trkPair = std::pair<G4String,G4String>(def2->GetParticleName(),def1->GetParticleName()); |
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| 176 | |
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| 177 | std::vector<G4double> data; |
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| 178 | |
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| 179 | if (xMap.find(trkPair) != xMap.end()) |
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| 180 | { |
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| 181 | |
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| 182 | PairDoubleMap::const_iterator iter; |
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| 183 | for (iter = xMap.begin(); iter != xMap.end(); ++iter) |
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| 184 | { |
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| 185 | std::pair<G4String,G4String> thePair = (*iter).first; |
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| 186 | if (thePair == trkPair) |
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| 187 | { |
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| 188 | data = (*iter).second; |
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| 189 | |
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| 190 | G4double eMinFit = data[0]; |
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| 191 | G4double eMaxFit = data[1]; |
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| 192 | G4double xFit = data[2]; |
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| 193 | G4double y1Fit = data[3]; |
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| 194 | G4double y2Fit = data[4]; |
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| 195 | |
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| 196 | // Total Cross-section fit, 1998 Review of Particle Properties, European Phys. J. 3(1998), 1 |
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| 197 | |
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| 198 | // Parameters from the PDG fit |
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| 199 | const G4double epsilon = 0.095; |
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| 200 | const G4double eta1 = -0.34; |
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| 201 | const G4double eta2 = -0.55; |
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| 202 | |
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| 203 | if (sqrtS < eMinFit || sqrtS > eMaxFit) |
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| 204 | { |
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| 205 | G4cout << "WARNING! G4XPDGTotal::PDGTotal extrapolating cross section at " |
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| 206 | << sqrtS / GeV |
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| 207 | << " GeV outside the PDG fit range " |
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| 208 | << eMinFit / GeV << " - " << eMaxFit / GeV << " GeV " << G4endl; |
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| 209 | } |
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| 210 | |
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| 211 | G4double s = (sqrtS * sqrtS) / (GeV*GeV); |
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| 212 | |
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| 213 | sigma = ( (xFit * std::pow(s,epsilon)) + |
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| 214 | (y1Fit * std::pow(s,eta1)) + |
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| 215 | (coeff * y2Fit * std::pow(s,eta2)) ) * millibarn; |
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| 216 | |
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| 217 | if (sigma < 0.) |
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| 218 | { |
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| 219 | G4String name1 = def1->GetParticleName(); |
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| 220 | G4String name2 = def2->GetParticleName(); |
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| 221 | G4cout << "WARNING! G4XPDGTotal::PDGTotal " |
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| 222 | << name1 << "-" << name2 |
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| 223 | << " total cross section: Ecm " |
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| 224 | << sqrtS / GeV << " GeV, negative cross section " |
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| 225 | << sigma / millibarn << " mb set to 0" << G4endl; |
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| 226 | sigma = 0.; |
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| 227 | } |
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| 228 | } |
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| 229 | } |
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| 230 | } |
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| 231 | return sigma; |
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| 232 | } |
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| 233 | |
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| 234 | |
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| 235 | G4String G4XPDGTotal::Name() const |
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| 236 | { |
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| 237 | G4String name = "PDGTotal "; |
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| 238 | return name; |
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| 239 | } |
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| 240 | |
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| 241 | |
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| 242 | G4bool G4XPDGTotal::IsValid(G4double e) const |
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| 243 | { |
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| 244 | G4bool answer = InLimits(e,_lowLimit,_highLimit); |
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| 245 | |
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| 246 | return answer; |
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| 247 | } |
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| 248 | |
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| 249 | |
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| 250 | G4double G4XPDGTotal::PDGTotal(G4double ,G4double ) const |
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| 251 | { |
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| 252 | return 0.; |
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| 253 | } |
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