[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 | // 17.07.06 V. Grichine - first implementation |
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| 28 | // 22.01.07 V.Ivanchenko - add interface with Z and A |
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| 29 | // 05.03.07 V.Ivanchenko - add IfZAApplicable |
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| 30 | // |
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| 31 | |
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| 32 | #include "G4GlauberGribovCrossSection.hh" |
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| 33 | |
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| 34 | #include "G4ParticleTable.hh" |
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| 35 | #include "G4IonTable.hh" |
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| 36 | #include "G4ParticleDefinition.hh" |
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| 37 | |
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| 38 | ////////////////////////////////////////////////////////////////////////////////////// |
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| 39 | // |
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| 40 | // |
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| 41 | |
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| 42 | |
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| 43 | G4GlauberGribovCrossSection::G4GlauberGribovCrossSection() |
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| 44 | : fUpperLimit( 10000 * GeV ), |
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| 45 | fLowerLimit( 3 * GeV ), |
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| 46 | fRadiusConst( 1.08*fermi ) // 1.1, 1.3 ? |
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| 47 | { |
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| 48 | theGamma = G4Gamma::Gamma(); |
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| 49 | theProton = G4Proton::Proton(); |
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| 50 | theNeutron = G4Neutron::Neutron(); |
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| 51 | theAProton = G4AntiProton::AntiProton(); |
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| 52 | theANeutron = G4AntiNeutron::AntiNeutron(); |
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| 53 | thePiPlus = G4PionPlus::PionPlus(); |
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| 54 | thePiMinus = G4PionMinus::PionMinus(); |
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| 55 | thePiZero = G4PionZero::PionZero(); |
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| 56 | theKPlus = G4KaonPlus::KaonPlus(); |
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| 57 | theKMinus = G4KaonMinus::KaonMinus(); |
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| 58 | theK0S = G4KaonZeroShort::KaonZeroShort(); |
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| 59 | theK0L = G4KaonZeroLong::KaonZeroLong(); |
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| 60 | theL = G4Lambda::Lambda(); |
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| 61 | theAntiL = G4AntiLambda::AntiLambda(); |
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| 62 | theSPlus = G4SigmaPlus::SigmaPlus(); |
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| 63 | theASPlus = G4AntiSigmaPlus::AntiSigmaPlus(); |
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| 64 | theSMinus = G4SigmaMinus::SigmaMinus(); |
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| 65 | theASMinus = G4AntiSigmaMinus::AntiSigmaMinus(); |
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| 66 | theS0 = G4SigmaZero::SigmaZero(); |
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| 67 | theAS0 = G4AntiSigmaZero::AntiSigmaZero(); |
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| 68 | theXiMinus = G4XiMinus::XiMinus(); |
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| 69 | theXi0 = G4XiZero::XiZero(); |
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| 70 | theAXiMinus = G4AntiXiMinus::AntiXiMinus(); |
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| 71 | theAXi0 = G4AntiXiZero::AntiXiZero(); |
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| 72 | theOmega = G4OmegaMinus::OmegaMinus(); |
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| 73 | theAOmega = G4AntiOmegaMinus::AntiOmegaMinus(); |
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| 74 | theD = G4Deuteron::Deuteron(); |
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| 75 | theT = G4Triton::Triton(); |
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| 76 | theA = G4Alpha::Alpha(); |
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| 77 | theHe3 = G4He3::He3(); |
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| 78 | } |
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| 79 | |
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| 80 | /////////////////////////////////////////////////////////////////////////////////////// |
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| 81 | // |
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| 82 | // |
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| 83 | |
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| 84 | G4GlauberGribovCrossSection::~G4GlauberGribovCrossSection() |
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| 85 | { |
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| 86 | } |
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| 87 | |
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| 88 | |
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| 89 | //////////////////////////////////////////////////////////////////////////////////////// |
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| 90 | // |
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| 91 | // |
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| 92 | |
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| 93 | |
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| 94 | G4bool |
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| 95 | G4GlauberGribovCrossSection::IsApplicable(const G4DynamicParticle* aDP, |
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| 96 | const G4Element* anElement) |
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| 97 | { |
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| 98 | return IsZAApplicable(aDP, anElement->GetZ(), anElement->GetN()); |
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| 99 | } |
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| 100 | |
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| 101 | //////////////////////////////////////////////////////////////////////////////////////// |
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| 102 | // |
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| 103 | // |
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| 104 | |
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| 105 | G4bool |
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| 106 | G4GlauberGribovCrossSection::IsZAApplicable(const G4DynamicParticle* aDP, |
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| 107 | G4double Z, G4double) |
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| 108 | { |
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| 109 | G4bool applicable = false; |
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| 110 | // G4int baryonNumber = aDP->GetDefinition()->GetBaryonNumber(); |
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| 111 | G4double kineticEnergy = aDP->GetKineticEnergy(); |
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| 112 | |
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| 113 | const G4ParticleDefinition* theParticle = aDP->GetDefinition(); |
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| 114 | |
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| 115 | if ( ( kineticEnergy >= fLowerLimit && |
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| 116 | Z > 1.5 && // >= He |
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| 117 | ( theParticle == theAProton || |
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| 118 | theParticle == theGamma || |
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| 119 | theParticle == theKPlus || |
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| 120 | theParticle == theKMinus || |
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| 121 | theParticle == theSMinus) ) || |
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| 122 | |
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| 123 | ( kineticEnergy >= 0.1*fLowerLimit && |
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| 124 | Z > 1.5 && // >= He |
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| 125 | ( theParticle == theProton || |
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| 126 | theParticle == theNeutron || |
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| 127 | theParticle == thePiPlus || |
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| 128 | theParticle == thePiMinus ) ) ) applicable = true; |
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| 129 | |
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| 130 | return applicable; |
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| 131 | } |
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| 132 | |
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| 133 | //////////////////////////////////////////////////////////////////////////////////////// |
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| 134 | // |
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| 135 | // Calculates total and inelastic Xsc, derives elastic as total - inelastic accordong to |
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| 136 | // Glauber model with Gribov correction calculated in the dipole approximation on |
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| 137 | // light cone. Gaussian density helps to calculate rest integrals of the model. |
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| 138 | // [1] B.Z. Kopeliovich, nucl-th/0306044 |
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| 139 | |
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| 140 | |
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| 141 | G4double G4GlauberGribovCrossSection:: |
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| 142 | GetCrossSection(const G4DynamicParticle* aParticle, const G4Element* anElement, G4double T) |
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| 143 | { |
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| 144 | return GetIsoZACrossSection(aParticle, anElement->GetZ(), anElement->GetN(), T); |
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| 145 | } |
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| 146 | |
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| 147 | //////////////////////////////////////////////////////////////////////////////////////// |
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| 148 | // |
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| 149 | // Calculates total and inelastic Xsc, derives elastic as total - inelastic accordong to |
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| 150 | // Glauber model with Gribov correction calculated in the dipole approximation on |
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| 151 | // light cone. Gaussian density of point-like nucleons helps to calculate rest integrals of the model. |
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| 152 | // [1] B.Z. Kopeliovich, nucl-th/0306044 + simplification above |
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| 153 | |
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| 154 | |
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| 155 | |
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| 156 | G4double G4GlauberGribovCrossSection:: |
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| 157 | GetIsoZACrossSection(const G4DynamicParticle* aParticle, G4double Z, G4double A, G4double) |
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| 158 | { |
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| 159 | G4double xsection, sigma, cofInelastic, cofTotal, nucleusSquare, ratio; |
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| 160 | G4double R = GetNucleusRadius(A); |
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| 161 | |
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| 162 | const G4ParticleDefinition* theParticle = aParticle->GetDefinition(); |
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| 163 | |
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| 164 | if( theParticle == theProton || |
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| 165 | theParticle == theNeutron || |
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| 166 | theParticle == thePiPlus || |
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| 167 | theParticle == thePiMinus ) |
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| 168 | { |
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| 169 | sigma = GetHadronNucleonXscNS(aParticle, A, Z); |
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| 170 | cofInelastic = 2.4; |
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| 171 | cofTotal = 2.0; |
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| 172 | } |
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| 173 | else |
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| 174 | { |
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| 175 | sigma = GetHadronNucleonXscPDG(aParticle, A, Z); |
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| 176 | cofInelastic = 2.2; |
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| 177 | cofTotal = 2.0; |
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| 178 | } |
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| 179 | // cofInelastic = 2.0; |
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| 180 | |
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| 181 | |
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| 182 | nucleusSquare = cofTotal*pi*R*R; // basically 2piRR |
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| 183 | ratio = sigma/nucleusSquare; |
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| 184 | |
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| 185 | xsection = nucleusSquare*std::log( 1. + ratio ); |
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| 186 | |
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| 187 | fTotalXsc = xsection; |
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| 188 | |
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| 189 | |
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| 190 | |
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| 191 | fInelasticXsc = nucleusSquare*std::log( 1. + cofInelastic*ratio )/cofInelastic; |
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| 192 | |
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| 193 | fElasticXsc = fTotalXsc - fInelasticXsc; |
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| 194 | |
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| 195 | |
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| 196 | G4double difratio = ratio/(1.+ratio); |
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| 197 | |
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| 198 | fDiffractionXsc = 0.5*nucleusSquare*( difratio - std::log( 1. + difratio ) ); |
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| 199 | |
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| 200 | |
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| 201 | sigma = GetHNinelasticXsc(aParticle, A, Z); |
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| 202 | ratio = sigma/nucleusSquare; |
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| 203 | |
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| 204 | fProductionXsc = nucleusSquare*std::log( 1. + cofInelastic*ratio )/cofInelastic; |
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| 205 | |
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| 206 | if (fElasticXsc < 0.) fElasticXsc = 0.; |
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| 207 | |
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| 208 | return xsection; |
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| 209 | } |
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| 210 | |
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| 211 | ////////////////////////////////////////////////////////////////////////// |
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| 212 | // |
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| 213 | // Return single-diffraction/inelastic cross-section ratio |
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| 214 | |
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| 215 | G4double G4GlauberGribovCrossSection:: |
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| 216 | GetRatioSD(const G4DynamicParticle* aParticle, G4double A, G4double Z) |
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| 217 | { |
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| 218 | G4double sigma, cofInelastic, cofTotal, nucleusSquare, ratio; |
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| 219 | G4double R = GetNucleusRadius(A); |
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| 220 | |
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| 221 | const G4ParticleDefinition* theParticle = aParticle->GetDefinition(); |
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| 222 | |
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| 223 | if( theParticle == theProton || |
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| 224 | theParticle == theNeutron || |
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| 225 | theParticle == thePiPlus || |
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| 226 | theParticle == thePiMinus ) |
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| 227 | { |
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| 228 | sigma = GetHadronNucleonXscNS(aParticle, A, Z); |
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| 229 | cofInelastic = 2.4; |
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| 230 | cofTotal = 2.0; |
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| 231 | } |
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| 232 | else |
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| 233 | { |
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| 234 | sigma = GetHadronNucleonXscPDG(aParticle, A, Z); |
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| 235 | cofInelastic = 2.2; |
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| 236 | cofTotal = 2.0; |
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| 237 | } |
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| 238 | nucleusSquare = cofTotal*pi*R*R; // basically 2piRR |
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| 239 | ratio = sigma/nucleusSquare; |
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| 240 | |
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| 241 | fInelasticXsc = nucleusSquare*std::log( 1. + cofInelastic*ratio )/cofInelastic; |
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| 242 | |
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| 243 | G4double difratio = ratio/(1.+ratio); |
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| 244 | |
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| 245 | fDiffractionXsc = 0.5*nucleusSquare*( difratio - std::log( 1. + difratio ) ); |
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| 246 | |
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| 247 | if (fInelasticXsc > 0.) ratio = fDiffractionXsc/fInelasticXsc; |
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| 248 | else ratio = 0.; |
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| 249 | |
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| 250 | return ratio; |
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| 251 | } |
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| 252 | |
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| 253 | ////////////////////////////////////////////////////////////////////////// |
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| 254 | // |
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| 255 | // Return suasi-elastic/inelastic cross-section ratio |
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| 256 | |
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| 257 | G4double G4GlauberGribovCrossSection:: |
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| 258 | GetRatioQE(const G4DynamicParticle* aParticle, G4double A, G4double Z) |
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| 259 | { |
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| 260 | G4double sigma, cofInelastic, cofTotal, nucleusSquare, ratio; |
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| 261 | G4double R = GetNucleusRadius(A); |
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| 262 | |
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| 263 | const G4ParticleDefinition* theParticle = aParticle->GetDefinition(); |
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| 264 | |
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| 265 | if( theParticle == theProton || |
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| 266 | theParticle == theNeutron || |
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| 267 | theParticle == thePiPlus || |
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| 268 | theParticle == thePiMinus ) |
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| 269 | { |
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| 270 | sigma = GetHadronNucleonXscNS(aParticle, A, Z); |
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| 271 | cofInelastic = 2.4; |
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| 272 | cofTotal = 2.0; |
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| 273 | } |
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| 274 | else |
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| 275 | { |
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| 276 | sigma = GetHadronNucleonXscPDG(aParticle, A, Z); |
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| 277 | cofInelastic = 2.2; |
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| 278 | cofTotal = 2.0; |
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| 279 | } |
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| 280 | nucleusSquare = cofTotal*pi*R*R; // basically 2piRR |
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| 281 | ratio = sigma/nucleusSquare; |
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| 282 | |
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| 283 | fInelasticXsc = nucleusSquare*std::log( 1. + cofInelastic*ratio )/cofInelastic; |
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| 284 | |
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| 285 | sigma = GetHNinelasticXsc(aParticle, A, Z); |
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| 286 | ratio = sigma/nucleusSquare; |
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| 287 | |
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| 288 | fProductionXsc = nucleusSquare*std::log( 1. + cofInelastic*ratio )/cofInelastic; |
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| 289 | |
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| 290 | if (fInelasticXsc > fProductionXsc) ratio = (fInelasticXsc-fProductionXsc)/fInelasticXsc; |
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| 291 | else ratio = 0.; |
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| 292 | if ( ratio < 0. ) ratio = 0.; |
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| 293 | |
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| 294 | return ratio; |
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| 295 | } |
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| 296 | |
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| 297 | ///////////////////////////////////////////////////////////////////////////////////// |
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| 298 | // |
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| 299 | // Returns hadron-nucleon Xsc according to differnt parametrisations: |
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| 300 | // [2] E. Levin, hep-ph/9710546 |
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| 301 | // [3] U. Dersch, et al, hep-ex/9910052 |
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| 302 | // [4] M.J. Longo, et al, Phys.Rev.Lett. 33 (1974) 725 |
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| 303 | |
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| 304 | G4double |
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| 305 | G4GlauberGribovCrossSection::GetHadronNucleonXsc(const G4DynamicParticle* aParticle, |
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| 306 | const G4Element* anElement ) |
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| 307 | { |
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| 308 | G4double At = anElement->GetN(); // number of nucleons |
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| 309 | G4double Zt = anElement->GetZ(); // number of protons |
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| 310 | |
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| 311 | |
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| 312 | return GetHadronNucleonXsc( aParticle, At, Zt ); |
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| 313 | } |
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| 314 | |
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| 315 | |
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| 316 | |
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| 317 | |
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| 318 | ///////////////////////////////////////////////////////////////////////////////////// |
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| 319 | // |
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| 320 | // Returns hadron-nucleon Xsc according to differnt parametrisations: |
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| 321 | // [2] E. Levin, hep-ph/9710546 |
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| 322 | // [3] U. Dersch, et al, hep-ex/9910052 |
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| 323 | // [4] M.J. Longo, et al, Phys.Rev.Lett. 33 (1974) 725 |
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| 324 | |
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| 325 | G4double |
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| 326 | G4GlauberGribovCrossSection::GetHadronNucleonXsc(const G4DynamicParticle* aParticle, |
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| 327 | G4double At, G4double Zt ) |
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| 328 | { |
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| 329 | G4double xsection; |
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| 330 | |
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| 331 | |
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| 332 | G4double targ_mass = G4ParticleTable::GetParticleTable()-> |
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| 333 | GetIonTable()->GetIonMass( G4int(Zt+0.5) , G4int(At+0.5) ); |
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| 334 | |
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| 335 | targ_mass = 0.939*GeV; // ~mean neutron and proton ??? |
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| 336 | |
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| 337 | G4double proj_mass = aParticle->GetMass(); |
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| 338 | G4double proj_momentum = aParticle->GetMomentum().mag(); |
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| 339 | G4double sMand = CalcMandelstamS ( proj_mass , targ_mass , proj_momentum ); |
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| 340 | |
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| 341 | sMand /= GeV*GeV; // in GeV for parametrisation |
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| 342 | proj_momentum /= GeV; |
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| 343 | |
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| 344 | const G4ParticleDefinition* theParticle = aParticle->GetDefinition(); |
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| 345 | |
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| 346 | |
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| 347 | if(theParticle == theGamma) |
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| 348 | { |
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| 349 | xsection = At*(0.0677*std::pow(sMand,0.0808) + 0.129*std::pow(sMand,-0.4525)); |
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| 350 | } |
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| 351 | else if(theParticle == theNeutron) // as proton ??? |
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| 352 | { |
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| 353 | xsection = At*(21.70*std::pow(sMand,0.0808) + 56.08*std::pow(sMand,-0.4525)); |
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| 354 | } |
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| 355 | else if(theParticle == theProton) |
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| 356 | { |
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| 357 | xsection = At*(21.70*std::pow(sMand,0.0808) + 56.08*std::pow(sMand,-0.4525)); |
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| 358 | // xsection = At*( 49.51*std::pow(sMand,-0.097) + 0.314*std::log(sMand)*std::log(sMand) ); |
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| 359 | // xsection = At*( 38.4 + 0.85*std::abs(std::pow(log(sMand),1.47)) ); |
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| 360 | } |
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| 361 | else if(theParticle == theAProton) |
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| 362 | { |
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| 363 | xsection = At*( 21.70*std::pow(sMand,0.0808) + 98.39*std::pow(sMand,-0.4525)); |
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| 364 | } |
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| 365 | else if(theParticle == thePiPlus) |
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| 366 | { |
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| 367 | xsection = At*(13.63*std::pow(sMand,0.0808) + 27.56*std::pow(sMand,-0.4525)); |
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| 368 | } |
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| 369 | else if(theParticle == thePiMinus) |
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| 370 | { |
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| 371 | // xsection = At*( 55.2*std::pow(sMand,-0.255) + 0.346*std::log(sMand)*std::log(sMand) ); |
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| 372 | xsection = At*(13.63*std::pow(sMand,0.0808) + 36.02*std::pow(sMand,-0.4525)); |
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| 373 | } |
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| 374 | else if(theParticle == theKPlus) |
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| 375 | { |
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| 376 | xsection = At*(11.82*std::pow(sMand,0.0808) + 8.15*std::pow(sMand,-0.4525)); |
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| 377 | } |
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| 378 | else if(theParticle == theKMinus) |
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| 379 | { |
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| 380 | xsection = At*(11.82*std::pow(sMand,0.0808) + 26.36*std::pow(sMand,-0.4525)); |
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| 381 | } |
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| 382 | else // as proton ??? |
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| 383 | { |
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| 384 | xsection = At*(21.70*std::pow(sMand,0.0808) + 56.08*std::pow(sMand,-0.4525)); |
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| 385 | } |
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| 386 | xsection *= millibarn; |
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| 387 | return xsection; |
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| 388 | } |
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| 389 | |
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| 390 | |
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| 391 | ///////////////////////////////////////////////////////////////////////////////////// |
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| 392 | // |
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| 393 | // Returns hadron-nucleon Xsc according to PDG parametrisation (2005): |
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| 394 | // http://pdg.lbl.gov/2006/reviews/hadronicrpp.pdf |
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| 395 | |
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| 396 | G4double |
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| 397 | G4GlauberGribovCrossSection::GetHadronNucleonXscPDG(const G4DynamicParticle* aParticle, |
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| 398 | const G4Element* anElement ) |
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| 399 | { |
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| 400 | G4double At = anElement->GetN(); // number of nucleons |
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| 401 | G4double Zt = anElement->GetZ(); // number of protons |
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| 402 | |
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| 403 | |
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| 404 | return GetHadronNucleonXscPDG( aParticle, At, Zt ); |
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| 405 | } |
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| 406 | |
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| 407 | |
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| 408 | |
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| 409 | |
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| 410 | ///////////////////////////////////////////////////////////////////////////////////// |
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| 411 | // |
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| 412 | // Returns hadron-nucleon Xsc according to PDG parametrisation (2005): |
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| 413 | // http://pdg.lbl.gov/2006/reviews/hadronicrpp.pdf |
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| 414 | // At = number of nucleons, Zt = number of protons |
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| 415 | |
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| 416 | G4double |
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| 417 | G4GlauberGribovCrossSection::GetHadronNucleonXscPDG(const G4DynamicParticle* aParticle, |
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| 418 | G4double At, G4double Zt ) |
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| 419 | { |
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| 420 | G4double xsection; |
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| 421 | |
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| 422 | G4double Nt = At-Zt; // number of neutrons |
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| 423 | if (Nt < 0.) Nt = 0.; |
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| 424 | |
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| 425 | |
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| 426 | G4double targ_mass = G4ParticleTable::GetParticleTable()-> |
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| 427 | GetIonTable()->GetIonMass( G4int(Zt+0.5) , G4int(At+0.5) ); |
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| 428 | |
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| 429 | targ_mass = 0.939*GeV; // ~mean neutron and proton ??? |
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| 430 | |
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| 431 | G4double proj_mass = aParticle->GetMass(); |
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| 432 | G4double proj_momentum = aParticle->GetMomentum().mag(); |
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| 433 | |
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| 434 | G4double sMand = CalcMandelstamS ( proj_mass , targ_mass , proj_momentum ); |
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| 435 | |
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| 436 | sMand /= GeV*GeV; // in GeV for parametrisation |
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| 437 | |
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| 438 | // General PDG fit constants |
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| 439 | |
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| 440 | G4double s0 = 5.38*5.38; // in Gev^2 |
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| 441 | G4double eta1 = 0.458; |
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| 442 | G4double eta2 = 0.458; |
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| 443 | G4double B = 0.308; |
---|
| 444 | |
---|
| 445 | |
---|
| 446 | const G4ParticleDefinition* theParticle = aParticle->GetDefinition(); |
---|
| 447 | |
---|
| 448 | |
---|
| 449 | if(theParticle == theNeutron) // proton-neutron fit |
---|
| 450 | { |
---|
| 451 | xsection = Zt*( 35.80 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 452 | + 40.15*std::pow(sMand,-eta1) - 30.*std::pow(sMand,-eta2)); |
---|
| 453 | xsection += Nt*( 35.45 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 454 | + 42.53*std::pow(sMand,-eta1) - 33.34*std::pow(sMand,-eta2)); // pp for nn |
---|
| 455 | } |
---|
| 456 | else if(theParticle == theProton) |
---|
| 457 | { |
---|
| 458 | |
---|
| 459 | xsection = Zt*( 35.45 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 460 | + 42.53*std::pow(sMand,-eta1) - 33.34*std::pow(sMand,-eta2)); |
---|
| 461 | |
---|
| 462 | xsection += Nt*( 35.80 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 463 | + 40.15*std::pow(sMand,-eta1) - 30.*std::pow(sMand,-eta2)); |
---|
| 464 | } |
---|
| 465 | else if(theParticle == theAProton) |
---|
| 466 | { |
---|
| 467 | xsection = Zt*( 35.45 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 468 | + 42.53*std::pow(sMand,-eta1) + 33.34*std::pow(sMand,-eta2)); |
---|
| 469 | |
---|
| 470 | xsection += Nt*( 35.80 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 471 | + 40.15*std::pow(sMand,-eta1) + 30.*std::pow(sMand,-eta2)); |
---|
| 472 | } |
---|
| 473 | else if(theParticle == thePiPlus) |
---|
| 474 | { |
---|
| 475 | xsection = At*( 20.86 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 476 | + 19.24*std::pow(sMand,-eta1) - 6.03*std::pow(sMand,-eta2)); |
---|
| 477 | } |
---|
| 478 | else if(theParticle == thePiMinus) |
---|
| 479 | { |
---|
| 480 | xsection = At*( 20.86 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 481 | + 19.24*std::pow(sMand,-eta1) + 6.03*std::pow(sMand,-eta2)); |
---|
| 482 | } |
---|
| 483 | else if(theParticle == theKPlus) |
---|
| 484 | { |
---|
| 485 | xsection = Zt*( 17.91 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 486 | + 7.14*std::pow(sMand,-eta1) - 13.45*std::pow(sMand,-eta2)); |
---|
| 487 | |
---|
| 488 | xsection += Nt*( 17.87 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 489 | + 5.17*std::pow(sMand,-eta1) - 7.23*std::pow(sMand,-eta2)); |
---|
| 490 | } |
---|
| 491 | else if(theParticle == theKMinus) |
---|
| 492 | { |
---|
| 493 | xsection = Zt*( 17.91 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 494 | + 7.14*std::pow(sMand,-eta1) + 13.45*std::pow(sMand,-eta2)); |
---|
| 495 | |
---|
| 496 | xsection += Nt*( 17.87 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 497 | + 5.17*std::pow(sMand,-eta1) + 7.23*std::pow(sMand,-eta2)); |
---|
| 498 | } |
---|
| 499 | else if(theParticle == theSMinus) |
---|
| 500 | { |
---|
| 501 | xsection = At*( 35.20 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 502 | - 199.*std::pow(sMand,-eta1) + 264.*std::pow(sMand,-eta2)); |
---|
| 503 | } |
---|
| 504 | else if(theParticle == theGamma) // modify later on |
---|
| 505 | { |
---|
| 506 | xsection = At*( 0.0 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 507 | + 0.032*std::pow(sMand,-eta1) - 0.0*std::pow(sMand,-eta2)); |
---|
| 508 | |
---|
| 509 | } |
---|
| 510 | else // as proton ??? |
---|
| 511 | { |
---|
| 512 | xsection = Zt*( 35.45 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 513 | + 42.53*std::pow(sMand,-eta1) - 33.34*std::pow(sMand,-eta2)); |
---|
| 514 | |
---|
| 515 | xsection += Nt*( 35.80 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 516 | + 40.15*std::pow(sMand,-eta1) - 30.*std::pow(sMand,-eta2)); |
---|
| 517 | } |
---|
| 518 | xsection *= millibarn; // parametrised in mb |
---|
| 519 | return xsection; |
---|
| 520 | } |
---|
| 521 | |
---|
| 522 | |
---|
| 523 | ///////////////////////////////////////////////////////////////////////////////////// |
---|
| 524 | // |
---|
| 525 | // Returns hadron-nucleon cross-section based on N. Starkov parametrisation of |
---|
| 526 | // data from mainly http://wwwppds.ihep.su:8001/c5-6A.html database |
---|
| 527 | |
---|
| 528 | G4double |
---|
| 529 | G4GlauberGribovCrossSection::GetHadronNucleonXscNS(const G4DynamicParticle* aParticle, |
---|
| 530 | const G4Element* anElement ) |
---|
| 531 | { |
---|
| 532 | G4double At = anElement->GetN(); // number of nucleons |
---|
| 533 | G4double Zt = anElement->GetZ(); // number of protons |
---|
| 534 | |
---|
| 535 | |
---|
| 536 | return GetHadronNucleonXscNS( aParticle, At, Zt ); |
---|
| 537 | } |
---|
| 538 | |
---|
| 539 | |
---|
| 540 | |
---|
| 541 | |
---|
| 542 | ///////////////////////////////////////////////////////////////////////////////////// |
---|
| 543 | // |
---|
| 544 | // Returns hadron-nucleon cross-section based on N. Starkov parametrisation of |
---|
| 545 | // data from mainly http://wwwppds.ihep.su:8001/c5-6A.html database |
---|
| 546 | |
---|
| 547 | G4double |
---|
| 548 | G4GlauberGribovCrossSection::GetHadronNucleonXscNS(const G4DynamicParticle* aParticle, |
---|
| 549 | G4double At, G4double Zt ) |
---|
| 550 | { |
---|
| 551 | G4double xsection(0), Delta, A0, B0; |
---|
| 552 | G4double hpXsc(0); |
---|
| 553 | G4double hnXsc(0); |
---|
| 554 | |
---|
| 555 | G4double Nt = At-Zt; // number of neutrons |
---|
| 556 | if (Nt < 0.) Nt = 0.; |
---|
| 557 | |
---|
| 558 | |
---|
| 559 | G4double targ_mass = G4ParticleTable::GetParticleTable()-> |
---|
| 560 | GetIonTable()->GetIonMass( G4int(Zt+0.5) , G4int(At+0.5) ); |
---|
| 561 | |
---|
| 562 | targ_mass = 0.939*GeV; // ~mean neutron and proton ??? |
---|
| 563 | |
---|
| 564 | G4double proj_mass = aParticle->GetMass(); |
---|
| 565 | G4double proj_energy = aParticle->GetTotalEnergy(); |
---|
| 566 | G4double proj_momentum = aParticle->GetMomentum().mag(); |
---|
| 567 | |
---|
| 568 | G4double sMand = CalcMandelstamS ( proj_mass , targ_mass , proj_momentum ); |
---|
| 569 | |
---|
| 570 | sMand /= GeV*GeV; // in GeV for parametrisation |
---|
| 571 | proj_momentum /= GeV; |
---|
| 572 | proj_energy /= GeV; |
---|
| 573 | proj_mass /= GeV; |
---|
| 574 | |
---|
| 575 | // General PDG fit constants |
---|
| 576 | |
---|
| 577 | G4double s0 = 5.38*5.38; // in Gev^2 |
---|
| 578 | G4double eta1 = 0.458; |
---|
| 579 | G4double eta2 = 0.458; |
---|
| 580 | G4double B = 0.308; |
---|
| 581 | |
---|
| 582 | |
---|
| 583 | const G4ParticleDefinition* theParticle = aParticle->GetDefinition(); |
---|
| 584 | |
---|
| 585 | |
---|
| 586 | if(theParticle == theNeutron) |
---|
| 587 | { |
---|
| 588 | if( proj_momentum >= 10.) |
---|
| 589 | // if( proj_momentum >= 2.) |
---|
| 590 | { |
---|
| 591 | Delta = 1.; |
---|
| 592 | |
---|
| 593 | if( proj_energy < 40. ) Delta = 0.916+0.0021*proj_energy; |
---|
| 594 | |
---|
| 595 | if(proj_momentum >= 10.) |
---|
| 596 | { |
---|
| 597 | B0 = 7.5; |
---|
| 598 | A0 = 100. - B0*std::log(3.0e7); |
---|
| 599 | |
---|
| 600 | xsection = A0 + B0*std::log(proj_energy) - 11 |
---|
| 601 | + 103*std::pow(2*0.93827*proj_energy + proj_mass*proj_mass+ |
---|
| 602 | 0.93827*0.93827,-0.165); // mb |
---|
| 603 | } |
---|
| 604 | xsection *= Zt + Nt; |
---|
| 605 | } |
---|
| 606 | else |
---|
| 607 | { |
---|
| 608 | // nn to be pp |
---|
| 609 | |
---|
| 610 | if( proj_momentum < 0.73 ) |
---|
| 611 | { |
---|
| 612 | hnXsc = 23 + 50*( std::pow( std::log(0.73/proj_momentum), 3.5 ) ); |
---|
| 613 | } |
---|
| 614 | else if( proj_momentum < 1.05 ) |
---|
| 615 | { |
---|
| 616 | hnXsc = 23 + 40*(std::log(proj_momentum/0.73))* |
---|
| 617 | (std::log(proj_momentum/0.73)); |
---|
| 618 | } |
---|
| 619 | else // if( proj_momentum < 10. ) |
---|
| 620 | { |
---|
| 621 | hnXsc = 39.0+ |
---|
| 622 | 75*(proj_momentum - 1.2)/(std::pow(proj_momentum,3.0) + 0.15); |
---|
| 623 | } |
---|
| 624 | // pn to be np |
---|
| 625 | |
---|
| 626 | if( proj_momentum < 0.8 ) |
---|
| 627 | { |
---|
| 628 | hpXsc = 33+30*std::pow(std::log(proj_momentum/1.3),4.0); |
---|
| 629 | } |
---|
| 630 | else if( proj_momentum < 1.4 ) |
---|
| 631 | { |
---|
| 632 | hpXsc = 33+30*std::pow(std::log(proj_momentum/0.95),2.0); |
---|
| 633 | } |
---|
| 634 | else // if( proj_momentum < 10. ) |
---|
| 635 | { |
---|
| 636 | hpXsc = 33.3+ |
---|
| 637 | 20.8*(std::pow(proj_momentum,2.0)-1.35)/ |
---|
| 638 | (std::pow(proj_momentum,2.50)+0.95); |
---|
| 639 | } |
---|
| 640 | xsection = hpXsc*Zt + hnXsc*Nt; |
---|
| 641 | } |
---|
| 642 | } |
---|
| 643 | else if(theParticle == theProton) |
---|
| 644 | { |
---|
| 645 | if( proj_momentum >= 10.) |
---|
| 646 | // if( proj_momentum >= 2.) |
---|
| 647 | { |
---|
| 648 | Delta = 1.; |
---|
| 649 | |
---|
| 650 | if( proj_energy < 40. ) Delta = 0.916+0.0021*proj_energy; |
---|
| 651 | |
---|
| 652 | if(proj_momentum >= 10.) |
---|
| 653 | { |
---|
| 654 | B0 = 7.5; |
---|
| 655 | A0 = 100. - B0*std::log(3.0e7); |
---|
| 656 | |
---|
| 657 | xsection = A0 + B0*std::log(proj_energy) - 11 |
---|
| 658 | + 103*std::pow(2*0.93827*proj_energy + proj_mass*proj_mass+ |
---|
| 659 | 0.93827*0.93827,-0.165); // mb |
---|
| 660 | } |
---|
| 661 | xsection *= Zt + Nt; |
---|
| 662 | } |
---|
| 663 | else |
---|
| 664 | { |
---|
| 665 | // pp |
---|
| 666 | |
---|
| 667 | if( proj_momentum < 0.73 ) |
---|
| 668 | { |
---|
| 669 | hpXsc = 23 + 50*( std::pow( std::log(0.73/proj_momentum), 3.5 ) ); |
---|
| 670 | } |
---|
| 671 | else if( proj_momentum < 1.05 ) |
---|
| 672 | { |
---|
| 673 | hpXsc = 23 + 40*(std::log(proj_momentum/0.73))* |
---|
| 674 | (std::log(proj_momentum/0.73)); |
---|
| 675 | } |
---|
| 676 | else // if( proj_momentum < 10. ) |
---|
| 677 | { |
---|
| 678 | hpXsc = 39.0+ |
---|
| 679 | 75*(proj_momentum - 1.2)/(std::pow(proj_momentum,3.0) + 0.15); |
---|
| 680 | } |
---|
| 681 | // pn to be np |
---|
| 682 | |
---|
| 683 | if( proj_momentum < 0.8 ) |
---|
| 684 | { |
---|
| 685 | hnXsc = 33+30*std::pow(std::log(proj_momentum/1.3),4.0); |
---|
| 686 | } |
---|
| 687 | else if( proj_momentum < 1.4 ) |
---|
| 688 | { |
---|
| 689 | hnXsc = 33+30*std::pow(std::log(proj_momentum/0.95),2.0); |
---|
| 690 | } |
---|
| 691 | else // if( proj_momentum < 10. ) |
---|
| 692 | { |
---|
| 693 | hnXsc = 33.3+ |
---|
| 694 | 20.8*(std::pow(proj_momentum,2.0)-1.35)/ |
---|
| 695 | (std::pow(proj_momentum,2.50)+0.95); |
---|
| 696 | } |
---|
| 697 | xsection = hpXsc*Zt + hnXsc*Nt; |
---|
| 698 | // xsection = hpXsc*(Zt + Nt); |
---|
| 699 | // xsection = hnXsc*(Zt + Nt); |
---|
| 700 | } |
---|
| 701 | // xsection *= 0.95; |
---|
| 702 | } |
---|
| 703 | else if(theParticle == theAProton) |
---|
| 704 | { |
---|
| 705 | xsection = Zt*( 35.45 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 706 | + 42.53*std::pow(sMand,-eta1) + 33.34*std::pow(sMand,-eta2)); |
---|
| 707 | |
---|
| 708 | xsection += Nt*( 35.80 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 709 | + 40.15*std::pow(sMand,-eta1) + 30.*std::pow(sMand,-eta2)); |
---|
| 710 | } |
---|
| 711 | else if(theParticle == thePiPlus) |
---|
| 712 | { |
---|
| 713 | if(proj_momentum < 0.4) |
---|
| 714 | { |
---|
| 715 | G4double Ex3 = 180*std::exp(-(proj_momentum-0.29)*(proj_momentum-0.29)/0.085/0.085); |
---|
| 716 | hpXsc = Ex3+20.0; |
---|
| 717 | } |
---|
| 718 | else if(proj_momentum < 1.15) |
---|
| 719 | { |
---|
| 720 | G4double Ex4 = 88*(std::log(proj_momentum/0.75))*(std::log(proj_momentum/0.75)); |
---|
| 721 | hpXsc = Ex4+14.0; |
---|
| 722 | } |
---|
| 723 | else if(proj_momentum < 3.5) |
---|
| 724 | { |
---|
| 725 | G4double Ex1 = 3.2*std::exp(-(proj_momentum-2.55)*(proj_momentum-2.55)/0.55/0.55); |
---|
| 726 | G4double Ex2 = 12*std::exp(-(proj_momentum-1.47)*(proj_momentum-1.47)/0.225/0.225); |
---|
| 727 | hpXsc = Ex1+Ex2+27.5; |
---|
| 728 | } |
---|
| 729 | else // if(proj_momentum > 3.5) // mb |
---|
| 730 | { |
---|
| 731 | hpXsc = 10.6+2.*std::log(proj_energy)+25*std::pow(proj_energy,-0.43); |
---|
| 732 | } |
---|
| 733 | // pi+n = pi-p?? |
---|
| 734 | |
---|
| 735 | if(proj_momentum < 0.37) |
---|
| 736 | { |
---|
| 737 | hnXsc = 28.0 + 40*std::exp(-(proj_momentum-0.29)*(proj_momentum-0.29)/0.07/0.07); |
---|
| 738 | } |
---|
| 739 | else if(proj_momentum<0.65) |
---|
| 740 | { |
---|
| 741 | hnXsc = 26+110*(std::log(proj_momentum/0.48))*(std::log(proj_momentum/0.48)); |
---|
| 742 | } |
---|
| 743 | else if(proj_momentum<1.3) |
---|
| 744 | { |
---|
| 745 | hnXsc = 36.1+ |
---|
| 746 | 10*std::exp(-(proj_momentum-0.72)*(proj_momentum-0.72)/0.06/0.06)+ |
---|
| 747 | 24*std::exp(-(proj_momentum-1.015)*(proj_momentum-1.015)/0.075/0.075); |
---|
| 748 | } |
---|
| 749 | else if(proj_momentum<3.0) |
---|
| 750 | { |
---|
| 751 | hnXsc = 36.1+0.079-4.313*std::log(proj_momentum)+ |
---|
| 752 | 3*std::exp(-(proj_momentum-2.1)*(proj_momentum-2.1)/0.4/0.4)+ |
---|
| 753 | 1.5*std::exp(-(proj_momentum-1.4)*(proj_momentum-1.4)/0.12/0.12); |
---|
| 754 | } |
---|
| 755 | else // mb |
---|
| 756 | { |
---|
| 757 | hnXsc = 10.6+2*std::log(proj_energy)+30*std::pow(proj_energy,-0.43); |
---|
| 758 | } |
---|
| 759 | xsection = hpXsc*Zt + hnXsc*Nt; |
---|
| 760 | } |
---|
| 761 | else if(theParticle == thePiMinus) |
---|
| 762 | { |
---|
| 763 | // pi-n = pi+p?? |
---|
| 764 | |
---|
| 765 | if(proj_momentum < 0.4) |
---|
| 766 | { |
---|
| 767 | G4double Ex3 = 180*std::exp(-(proj_momentum-0.29)*(proj_momentum-0.29)/0.085/0.085); |
---|
| 768 | hnXsc = Ex3+20.0; |
---|
| 769 | } |
---|
| 770 | else if(proj_momentum < 1.15) |
---|
| 771 | { |
---|
| 772 | G4double Ex4 = 88*(std::log(proj_momentum/0.75))*(std::log(proj_momentum/0.75)); |
---|
| 773 | hnXsc = Ex4+14.0; |
---|
| 774 | } |
---|
| 775 | else if(proj_momentum < 3.5) |
---|
| 776 | { |
---|
| 777 | G4double Ex1 = 3.2*std::exp(-(proj_momentum-2.55)*(proj_momentum-2.55)/0.55/0.55); |
---|
| 778 | G4double Ex2 = 12*std::exp(-(proj_momentum-1.47)*(proj_momentum-1.47)/0.225/0.225); |
---|
| 779 | hnXsc = Ex1+Ex2+27.5; |
---|
| 780 | } |
---|
| 781 | else // if(proj_momentum > 3.5) // mb |
---|
| 782 | { |
---|
| 783 | hnXsc = 10.6+2.*std::log(proj_energy)+25*std::pow(proj_energy,-0.43); |
---|
| 784 | } |
---|
| 785 | // pi-p |
---|
| 786 | |
---|
| 787 | if(proj_momentum < 0.37) |
---|
| 788 | { |
---|
| 789 | hpXsc = 28.0 + 40*std::exp(-(proj_momentum-0.29)*(proj_momentum-0.29)/0.07/0.07); |
---|
| 790 | } |
---|
| 791 | else if(proj_momentum<0.65) |
---|
| 792 | { |
---|
| 793 | hpXsc = 26+110*(std::log(proj_momentum/0.48))*(std::log(proj_momentum/0.48)); |
---|
| 794 | } |
---|
| 795 | else if(proj_momentum<1.3) |
---|
| 796 | { |
---|
| 797 | hpXsc = 36.1+ |
---|
| 798 | 10*std::exp(-(proj_momentum-0.72)*(proj_momentum-0.72)/0.06/0.06)+ |
---|
| 799 | 24*std::exp(-(proj_momentum-1.015)*(proj_momentum-1.015)/0.075/0.075); |
---|
| 800 | } |
---|
| 801 | else if(proj_momentum<3.0) |
---|
| 802 | { |
---|
| 803 | hpXsc = 36.1+0.079-4.313*std::log(proj_momentum)+ |
---|
| 804 | 3*std::exp(-(proj_momentum-2.1)*(proj_momentum-2.1)/0.4/0.4)+ |
---|
| 805 | 1.5*std::exp(-(proj_momentum-1.4)*(proj_momentum-1.4)/0.12/0.12); |
---|
| 806 | } |
---|
| 807 | else // mb |
---|
| 808 | { |
---|
| 809 | hpXsc = 10.6+2*std::log(proj_energy)+30*std::pow(proj_energy,-0.43); |
---|
| 810 | } |
---|
| 811 | xsection = hpXsc*Zt + hnXsc*Nt; |
---|
| 812 | } |
---|
| 813 | else if(theParticle == theKPlus) |
---|
| 814 | { |
---|
| 815 | xsection = Zt*( 17.91 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 816 | + 7.14*std::pow(sMand,-eta1) - 13.45*std::pow(sMand,-eta2)); |
---|
| 817 | |
---|
| 818 | xsection += Nt*( 17.87 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 819 | + 5.17*std::pow(sMand,-eta1) - 7.23*std::pow(sMand,-eta2)); |
---|
| 820 | } |
---|
| 821 | else if(theParticle == theKMinus) |
---|
| 822 | { |
---|
| 823 | xsection = Zt*( 17.91 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 824 | + 7.14*std::pow(sMand,-eta1) + 13.45*std::pow(sMand,-eta2)); |
---|
| 825 | |
---|
| 826 | xsection += Nt*( 17.87 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 827 | + 5.17*std::pow(sMand,-eta1) + 7.23*std::pow(sMand,-eta2)); |
---|
| 828 | } |
---|
| 829 | else if(theParticle == theSMinus) |
---|
| 830 | { |
---|
| 831 | xsection = At*( 35.20 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 832 | - 199.*std::pow(sMand,-eta1) + 264.*std::pow(sMand,-eta2)); |
---|
| 833 | } |
---|
| 834 | else if(theParticle == theGamma) // modify later on |
---|
| 835 | { |
---|
| 836 | xsection = At*( 0.0 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 837 | + 0.032*std::pow(sMand,-eta1) - 0.0*std::pow(sMand,-eta2)); |
---|
| 838 | |
---|
| 839 | } |
---|
| 840 | else // as proton ??? |
---|
| 841 | { |
---|
| 842 | xsection = Zt*( 35.45 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 843 | + 42.53*std::pow(sMand,-eta1) - 33.34*std::pow(sMand,-eta2)); |
---|
| 844 | |
---|
| 845 | xsection += Nt*( 35.80 + B*std::pow(std::log(sMand/s0),2.) |
---|
| 846 | + 40.15*std::pow(sMand,-eta1) - 30.*std::pow(sMand,-eta2)); |
---|
| 847 | } |
---|
| 848 | xsection *= millibarn; // parametrised in mb |
---|
| 849 | return xsection; |
---|
| 850 | } |
---|
| 851 | |
---|
| 852 | |
---|
| 853 | ///////////////////////////////////////////////////////////////////////////////////// |
---|
| 854 | // |
---|
| 855 | // Returns hadron-nucleon inelastic cross-section based on proper parametrisation |
---|
| 856 | |
---|
| 857 | G4double |
---|
| 858 | G4GlauberGribovCrossSection::GetHNinelasticXsc(const G4DynamicParticle* aParticle, |
---|
| 859 | const G4Element* anElement ) |
---|
| 860 | { |
---|
| 861 | G4double At = anElement->GetN(); // number of nucleons |
---|
| 862 | G4double Zt = anElement->GetZ(); // number of protons |
---|
| 863 | |
---|
| 864 | |
---|
| 865 | return GetHNinelasticXsc( aParticle, At, Zt ); |
---|
| 866 | } |
---|
| 867 | |
---|
| 868 | ///////////////////////////////////////////////////////////////////////////////////// |
---|
| 869 | // |
---|
| 870 | // Returns hadron-nucleon inelastic cross-section based on FTF-parametrisation |
---|
| 871 | |
---|
| 872 | G4double |
---|
| 873 | G4GlauberGribovCrossSection::GetHNinelasticXsc(const G4DynamicParticle* aParticle, |
---|
| 874 | G4double At, G4double Zt ) |
---|
| 875 | { |
---|
| 876 | G4ParticleDefinition* hadron = aParticle->GetDefinition(); |
---|
| 877 | G4double sumInelastic, Nt = At - Zt; |
---|
| 878 | if(Nt < 0.) Nt = 0.; |
---|
| 879 | |
---|
| 880 | if( hadron == theKPlus ) |
---|
| 881 | { |
---|
| 882 | sumInelastic = GetHNinelasticXscVU(aParticle, At, Zt); |
---|
| 883 | } |
---|
| 884 | else |
---|
| 885 | { |
---|
| 886 | sumInelastic = Zt*GetHadronNucleonXscMK(aParticle, theProton); |
---|
| 887 | sumInelastic += Nt*GetHadronNucleonXscMK(aParticle, theNeutron); |
---|
| 888 | } |
---|
| 889 | return sumInelastic; |
---|
| 890 | } |
---|
| 891 | |
---|
| 892 | |
---|
| 893 | ///////////////////////////////////////////////////////////////////////////////////// |
---|
| 894 | // |
---|
| 895 | // Returns hadron-nucleon inelastic cross-section based on FTF-parametrisation |
---|
| 896 | |
---|
| 897 | G4double |
---|
| 898 | G4GlauberGribovCrossSection::GetHNinelasticXscVU(const G4DynamicParticle* aParticle, |
---|
| 899 | G4double At, G4double Zt ) |
---|
| 900 | { |
---|
| 901 | G4int PDGcode = aParticle->GetDefinition()->GetPDGEncoding(); |
---|
| 902 | G4int absPDGcode = std::abs(PDGcode); |
---|
| 903 | |
---|
| 904 | G4double Elab = aParticle->GetTotalEnergy(); |
---|
| 905 | // (s - 2*0.88*GeV*GeV)/(2*0.939*GeV)/GeV; |
---|
| 906 | G4double Plab = aParticle->GetMomentum().mag(); |
---|
| 907 | // std::sqrt(Elab * Elab - 0.88); |
---|
| 908 | |
---|
| 909 | Elab /= GeV; |
---|
| 910 | Plab /= GeV; |
---|
| 911 | |
---|
| 912 | G4double LogPlab = std::log( Plab ); |
---|
| 913 | G4double sqrLogPlab = LogPlab * LogPlab; |
---|
| 914 | |
---|
| 915 | //G4cout<<"Plab = "<<Plab<<G4endl; |
---|
| 916 | |
---|
| 917 | G4double NumberOfTargetProtons = Zt; |
---|
| 918 | G4double NumberOfTargetNucleons = At; |
---|
| 919 | G4double NumberOfTargetNeutrons = NumberOfTargetNucleons - NumberOfTargetProtons; |
---|
| 920 | |
---|
| 921 | if(NumberOfTargetNeutrons < 0.) NumberOfTargetNeutrons = 0.; |
---|
| 922 | |
---|
| 923 | G4double Xtotal, Xelastic, Xinelastic; |
---|
| 924 | |
---|
| 925 | if( absPDGcode > 1000 ) //------Projectile is baryon -------- |
---|
| 926 | { |
---|
| 927 | G4double XtotPP = 48.0 + 0. *std::pow(Plab, 0. ) + |
---|
| 928 | 0.522*sqrLogPlab - 4.51*LogPlab; |
---|
| 929 | |
---|
| 930 | G4double XtotPN = 47.3 + 0. *std::pow(Plab, 0. ) + |
---|
| 931 | 0.513*sqrLogPlab - 4.27*LogPlab; |
---|
| 932 | |
---|
| 933 | G4double XelPP = 11.9 + 26.9*std::pow(Plab,-1.21) + |
---|
| 934 | 0.169*sqrLogPlab - 1.85*LogPlab; |
---|
| 935 | |
---|
| 936 | G4double XelPN = 11.9 + 26.9*std::pow(Plab,-1.21) + |
---|
| 937 | 0.169*sqrLogPlab - 1.85*LogPlab; |
---|
| 938 | |
---|
| 939 | Xtotal = ( NumberOfTargetProtons * XtotPP + |
---|
| 940 | NumberOfTargetNeutrons * XtotPN ); |
---|
| 941 | |
---|
| 942 | Xelastic = ( NumberOfTargetProtons * XelPP + |
---|
| 943 | NumberOfTargetNeutrons * XelPN ); |
---|
| 944 | } |
---|
| 945 | else if( PDGcode == 211 ) //------Projectile is PionPlus ------- |
---|
| 946 | { |
---|
| 947 | G4double XtotPiP = 16.4 + 19.3 *std::pow(Plab,-0.42) + |
---|
| 948 | 0.19 *sqrLogPlab - 0.0 *LogPlab; |
---|
| 949 | |
---|
| 950 | G4double XtotPiN = 33.0 + 14.0 *std::pow(Plab,-1.36) + |
---|
| 951 | 0.456*sqrLogPlab - 4.03*LogPlab; |
---|
| 952 | |
---|
| 953 | G4double XelPiP = 0.0 + 11.4*std::pow(Plab,-0.40) + |
---|
| 954 | 0.079*sqrLogPlab - 0.0 *LogPlab; |
---|
| 955 | |
---|
| 956 | G4double XelPiN = 1.76 + 11.2*std::pow(Plab,-0.64) + |
---|
| 957 | 0.043*sqrLogPlab - 0.0 *LogPlab; |
---|
| 958 | |
---|
| 959 | Xtotal = ( NumberOfTargetProtons * XtotPiP + |
---|
| 960 | NumberOfTargetNeutrons * XtotPiN ); |
---|
| 961 | |
---|
| 962 | Xelastic = ( NumberOfTargetProtons * XelPiP + |
---|
| 963 | NumberOfTargetNeutrons * XelPiN ); |
---|
| 964 | } |
---|
| 965 | else if( PDGcode == -211 ) //------Projectile is PionMinus ------- |
---|
| 966 | { |
---|
| 967 | G4double XtotPiP = 33.0 + 14.0 *std::pow(Plab,-1.36) + |
---|
| 968 | 0.456*sqrLogPlab - 4.03*LogPlab; |
---|
| 969 | |
---|
| 970 | G4double XtotPiN = 16.4 + 19.3 *std::pow(Plab,-0.42) + |
---|
| 971 | 0.19 *sqrLogPlab - 0.0 *LogPlab; |
---|
| 972 | |
---|
| 973 | G4double XelPiP = 1.76 + 11.2*std::pow(Plab,-0.64) + |
---|
| 974 | 0.043*sqrLogPlab - 0.0 *LogPlab; |
---|
| 975 | |
---|
| 976 | G4double XelPiN = 0.0 + 11.4*std::pow(Plab,-0.40) + |
---|
| 977 | 0.079*sqrLogPlab - 0.0 *LogPlab; |
---|
| 978 | |
---|
| 979 | Xtotal = ( NumberOfTargetProtons * XtotPiP + |
---|
| 980 | NumberOfTargetNeutrons * XtotPiN ); |
---|
| 981 | |
---|
| 982 | Xelastic = ( NumberOfTargetProtons * XelPiP + |
---|
| 983 | NumberOfTargetNeutrons * XelPiN ); |
---|
| 984 | } |
---|
| 985 | else if( PDGcode == 111 ) //------Projectile is PionZero ------- |
---|
| 986 | { |
---|
| 987 | G4double XtotPiP =(16.4 + 19.3 *std::pow(Plab,-0.42) + |
---|
| 988 | 0.19 *sqrLogPlab - 0.0 *LogPlab + //Pi+ |
---|
| 989 | 33.0 + 14.0 *std::pow(Plab,-1.36) + |
---|
| 990 | 0.456*sqrLogPlab - 4.03*LogPlab)/2; //Pi- |
---|
| 991 | |
---|
| 992 | G4double XtotPiN =(33.0 + 14.0 *std::pow(Plab,-1.36) + |
---|
| 993 | 0.456*sqrLogPlab - 4.03*LogPlab + //Pi+ |
---|
| 994 | 16.4 + 19.3 *std::pow(Plab,-0.42) + |
---|
| 995 | 0.19 *sqrLogPlab - 0.0 *LogPlab)/2; //Pi- |
---|
| 996 | |
---|
| 997 | G4double XelPiP =( 0.0 + 11.4*std::pow(Plab,-0.40) + |
---|
| 998 | 0.079*sqrLogPlab - 0.0 *LogPlab + //Pi+ |
---|
| 999 | 1.76 + 11.2*std::pow(Plab,-0.64) + |
---|
| 1000 | 0.043*sqrLogPlab - 0.0 *LogPlab)/2; //Pi- |
---|
| 1001 | |
---|
| 1002 | G4double XelPiN =( 1.76 + 11.2*std::pow(Plab,-0.64) + |
---|
| 1003 | 0.043*sqrLogPlab - 0.0 *LogPlab + //Pi+ |
---|
| 1004 | 0.0 + 11.4*std::pow(Plab,-0.40) + |
---|
| 1005 | 0.079*sqrLogPlab - 0.0 *LogPlab)/2; //Pi- |
---|
| 1006 | |
---|
| 1007 | Xtotal = ( NumberOfTargetProtons * XtotPiP + |
---|
| 1008 | NumberOfTargetNeutrons * XtotPiN ); |
---|
| 1009 | |
---|
| 1010 | Xelastic = ( NumberOfTargetProtons * XelPiP + |
---|
| 1011 | NumberOfTargetNeutrons * XelPiN ); |
---|
| 1012 | } |
---|
| 1013 | else if( PDGcode == 321 ) //------Projectile is KaonPlus ------- |
---|
| 1014 | { |
---|
| 1015 | G4double XtotKP = 18.1 + 0. *std::pow(Plab, 0. ) + |
---|
| 1016 | 0.26 *sqrLogPlab - 1.0 *LogPlab; |
---|
| 1017 | G4double XtotKN = 18.7 + 0. *std::pow(Plab, 0. ) + |
---|
| 1018 | 0.21 *sqrLogPlab - 0.89*LogPlab; |
---|
| 1019 | |
---|
| 1020 | G4double XelKP = 5.0 + 8.1*std::pow(Plab,-1.8 ) + |
---|
| 1021 | 0.16 *sqrLogPlab - 1.3 *LogPlab; |
---|
| 1022 | |
---|
| 1023 | G4double XelKN = 7.3 + 0. *std::pow(Plab,-0. ) + |
---|
| 1024 | 0.29 *sqrLogPlab - 2.4 *LogPlab; |
---|
| 1025 | |
---|
| 1026 | Xtotal = ( NumberOfTargetProtons * XtotKP + |
---|
| 1027 | NumberOfTargetNeutrons * XtotKN ); |
---|
| 1028 | |
---|
| 1029 | Xelastic = ( NumberOfTargetProtons * XelKP + |
---|
| 1030 | NumberOfTargetNeutrons * XelKN ); |
---|
| 1031 | } |
---|
| 1032 | else if( PDGcode ==-321 ) //------Projectile is KaonMinus ------ |
---|
| 1033 | { |
---|
| 1034 | G4double XtotKP = 32.1 + 0. *std::pow(Plab, 0. ) + |
---|
| 1035 | 0.66 *sqrLogPlab - 5.6 *LogPlab; |
---|
| 1036 | G4double XtotKN = 25.2 + 0. *std::pow(Plab, 0. ) + |
---|
| 1037 | 0.38 *sqrLogPlab - 2.9 *LogPlab; |
---|
| 1038 | |
---|
| 1039 | G4double XelKP = 7.3 + 0. *std::pow(Plab,-0. ) + |
---|
| 1040 | 0.29 *sqrLogPlab - 2.4 *LogPlab; |
---|
| 1041 | |
---|
| 1042 | G4double XelKN = 5.0 + 8.1*std::pow(Plab,-1.8 ) + |
---|
| 1043 | 0.16 *sqrLogPlab - 1.3 *LogPlab; |
---|
| 1044 | |
---|
| 1045 | Xtotal = ( NumberOfTargetProtons * XtotKP + |
---|
| 1046 | NumberOfTargetNeutrons * XtotKN ); |
---|
| 1047 | |
---|
| 1048 | Xelastic = ( NumberOfTargetProtons * XelKP + |
---|
| 1049 | NumberOfTargetNeutrons * XelKN ); |
---|
| 1050 | } |
---|
| 1051 | else if( PDGcode == 311 ) //------Projectile is KaonZero ------ |
---|
| 1052 | { |
---|
| 1053 | G4double XtotKP = ( 18.1 + 0. *std::pow(Plab, 0. ) + |
---|
| 1054 | 0.26 *sqrLogPlab - 1.0 *LogPlab + //K+ |
---|
| 1055 | 32.1 + 0. *std::pow(Plab, 0. ) + |
---|
| 1056 | 0.66 *sqrLogPlab - 5.6 *LogPlab)/2; //K- |
---|
| 1057 | |
---|
| 1058 | G4double XtotKN = ( 18.7 + 0. *std::pow(Plab, 0. ) + |
---|
| 1059 | 0.21 *sqrLogPlab - 0.89*LogPlab + //K+ |
---|
| 1060 | 25.2 + 0. *std::pow(Plab, 0. ) + |
---|
| 1061 | 0.38 *sqrLogPlab - 2.9 *LogPlab)/2; //K- |
---|
| 1062 | |
---|
| 1063 | G4double XelKP = ( 5.0 + 8.1*std::pow(Plab,-1.8 ) |
---|
| 1064 | + 0.16 *sqrLogPlab - 1.3 *LogPlab + //K+ |
---|
| 1065 | 7.3 + 0. *std::pow(Plab,-0. ) + |
---|
| 1066 | 0.29 *sqrLogPlab - 2.4 *LogPlab)/2; //K- |
---|
| 1067 | |
---|
| 1068 | G4double XelKN = ( 7.3 + 0. *std::pow(Plab,-0. ) + |
---|
| 1069 | 0.29 *sqrLogPlab - 2.4 *LogPlab + //K+ |
---|
| 1070 | 5.0 + 8.1*std::pow(Plab,-1.8 ) + |
---|
| 1071 | 0.16 *sqrLogPlab - 1.3 *LogPlab)/2; //K- |
---|
| 1072 | |
---|
| 1073 | Xtotal = ( NumberOfTargetProtons * XtotKP + |
---|
| 1074 | NumberOfTargetNeutrons * XtotKN ); |
---|
| 1075 | |
---|
| 1076 | Xelastic = ( NumberOfTargetProtons * XelKP + |
---|
| 1077 | NumberOfTargetNeutrons * XelKN ); |
---|
| 1078 | } |
---|
| 1079 | else //------Projectile is undefined, Nucleon assumed |
---|
| 1080 | { |
---|
| 1081 | G4double XtotPP = 48.0 + 0. *std::pow(Plab, 0. ) + |
---|
| 1082 | 0.522*sqrLogPlab - 4.51*LogPlab; |
---|
| 1083 | |
---|
| 1084 | G4double XtotPN = 47.3 + 0. *std::pow(Plab, 0. ) + |
---|
| 1085 | 0.513*sqrLogPlab - 4.27*LogPlab; |
---|
| 1086 | |
---|
| 1087 | G4double XelPP = 11.9 + 26.9*std::pow(Plab,-1.21) + |
---|
| 1088 | 0.169*sqrLogPlab - 1.85*LogPlab; |
---|
| 1089 | G4double XelPN = 11.9 + 26.9*std::pow(Plab,-1.21) + |
---|
| 1090 | 0.169*sqrLogPlab - 1.85*LogPlab; |
---|
| 1091 | |
---|
| 1092 | Xtotal = ( NumberOfTargetProtons * XtotPP + |
---|
| 1093 | NumberOfTargetNeutrons * XtotPN ); |
---|
| 1094 | |
---|
| 1095 | Xelastic = ( NumberOfTargetProtons * XelPP + |
---|
| 1096 | NumberOfTargetNeutrons * XelPN ); |
---|
| 1097 | } |
---|
| 1098 | Xinelastic = Xtotal - Xelastic; |
---|
| 1099 | |
---|
| 1100 | if(Xinelastic < 0.) Xinelastic = 0.; |
---|
| 1101 | |
---|
| 1102 | return Xinelastic*= millibarn; |
---|
| 1103 | } |
---|
| 1104 | |
---|
| 1105 | ///////////////////////////////////////////////////////////////////////////////////// |
---|
| 1106 | // |
---|
| 1107 | // Returns hadron-nucleon cross-section based on Mikhail Kossov CHIPS parametrisation of |
---|
| 1108 | // data from G4QuasiFreeRatios class |
---|
| 1109 | |
---|
| 1110 | G4double |
---|
| 1111 | G4GlauberGribovCrossSection::GetHadronNucleonXscMK(const G4DynamicParticle* aParticle, |
---|
| 1112 | const G4ParticleDefinition* nucleon ) |
---|
| 1113 | { |
---|
| 1114 | G4int I = -1; |
---|
| 1115 | G4int PDG = aParticle->GetDefinition()->GetPDGEncoding(); |
---|
| 1116 | G4double totalXsc = 0; |
---|
| 1117 | G4double elasticXsc = 0; |
---|
| 1118 | G4double inelasticXsc; |
---|
| 1119 | // G4int absPDG = std::abs(PDG); |
---|
| 1120 | |
---|
| 1121 | G4double p = aParticle->GetMomentum().mag()/GeV; |
---|
| 1122 | |
---|
| 1123 | G4bool F = false; |
---|
| 1124 | if(nucleon == theProton) F = true; |
---|
| 1125 | else if(nucleon == theNeutron) F = false; |
---|
| 1126 | else |
---|
| 1127 | { |
---|
| 1128 | G4cout << "nucleon is not proton or neutron, return xsc for proton" << G4endl; |
---|
| 1129 | F = true; |
---|
| 1130 | } |
---|
| 1131 | |
---|
| 1132 | G4bool kfl = true; // Flag of K0/aK0 oscillation |
---|
| 1133 | G4bool kf = false; |
---|
| 1134 | |
---|
| 1135 | if( PDG == 130 || PDG == 310 ) |
---|
| 1136 | { |
---|
| 1137 | kf = true; |
---|
| 1138 | if( G4UniformRand() > .5 ) kfl = false; |
---|
| 1139 | } |
---|
| 1140 | if ( (PDG == 2212 && F) || (PDG == 2112 && !F) ) I = 0; // pp/nn |
---|
| 1141 | else if( (PDG == 2112 && F) || (PDG == 2212 && !F) ) I = 1; // np/pn |
---|
| 1142 | |
---|
| 1143 | else if( (PDG == -211 && F) || (PDG == 211 && !F) ) I = 2; // pimp/pipn |
---|
| 1144 | else if( (PDG == 211 && F) || (PDG ==-211 && !F) ) I = 3; // pipp/pimn |
---|
| 1145 | |
---|
| 1146 | else if( PDG == -321 || PDG == -311 || ( kf && !kfl ) ) I = 4; // KmN/K0N |
---|
| 1147 | else if( PDG == 321 || PDG == 311 || ( kf && kfl ) ) I = 5; // KpN/aK0N |
---|
| 1148 | |
---|
| 1149 | else if( PDG > 3000 && PDG < 3335) I = 6; // @@ for all hyperons - take Lambda |
---|
| 1150 | else if( PDG < -2000 && PDG > -3335) I = 7; // @@ for all anti-baryons - anti-p/anti-n |
---|
| 1151 | else |
---|
| 1152 | { |
---|
| 1153 | G4cout<<"MK PDG = "<<PDG |
---|
| 1154 | <<", while it is defined only for p,n,hyperons,anti-baryons,pi,K/antiK"<<G4endl; |
---|
| 1155 | G4Exception("G4QuasiFreeRatio::FetchElTot:","22",FatalException,"CHIPScrash"); |
---|
| 1156 | } |
---|
| 1157 | |
---|
| 1158 | // Each parameter set can have not more than nPoints = 128 parameters |
---|
| 1159 | |
---|
| 1160 | static const G4double lmi = 3.5; // min of (lnP-lmi)^2 parabola |
---|
| 1161 | static const G4double pbe = .0557; // elastic (lnP-lmi)^2 parabola coefficient |
---|
| 1162 | static const G4double pbt = .3; // total (lnP-lmi)^2 parabola coefficient |
---|
| 1163 | static const G4double pmi = .1; // Below that fast LE calculation is made |
---|
| 1164 | static const G4double pma = 1000.; // Above that fast HE calculation is made |
---|
| 1165 | |
---|
| 1166 | if( p <= 0.) |
---|
| 1167 | { |
---|
| 1168 | G4cout<<" p = "<<p<<" is zero or negative"<<G4endl; |
---|
| 1169 | |
---|
| 1170 | elasticXsc = 0.; |
---|
| 1171 | inelasticXsc = 0.; |
---|
| 1172 | totalXsc = 0.; |
---|
| 1173 | |
---|
| 1174 | return totalXsc; |
---|
| 1175 | } |
---|
| 1176 | if (!I) // pp/nn |
---|
| 1177 | { |
---|
| 1178 | if( p < pmi ) |
---|
| 1179 | { |
---|
| 1180 | G4double p2 = p*p; |
---|
| 1181 | elasticXsc = 1./(.00012 + p2*.2); |
---|
| 1182 | totalXsc = elasticXsc; |
---|
| 1183 | } |
---|
| 1184 | else if(p>pma) |
---|
| 1185 | { |
---|
| 1186 | G4double lp = std::log(p)-lmi; |
---|
| 1187 | G4double lp2 = lp*lp; |
---|
| 1188 | elasticXsc = pbe*lp2 + 6.72; |
---|
| 1189 | totalXsc = pbt*lp2 + 38.2; |
---|
| 1190 | } |
---|
| 1191 | else |
---|
| 1192 | { |
---|
| 1193 | G4double p2 = p*p; |
---|
| 1194 | G4double LE = 1./( .00012 + p2*.2); |
---|
| 1195 | G4double lp = std::log(p) - lmi; |
---|
| 1196 | G4double lp2 = lp*lp; |
---|
| 1197 | G4double rp2 = 1./p2; |
---|
| 1198 | elasticXsc = LE + ( pbe*lp2 + 6.72+32.6/p)/( 1. + rp2/p); |
---|
| 1199 | totalXsc = LE + ( pbt*lp2 + 38.2+52.7*rp2)/( 1. + 2.72*rp2*rp2); |
---|
| 1200 | } |
---|
| 1201 | } |
---|
| 1202 | else if( I==1 ) // np/pn |
---|
| 1203 | { |
---|
| 1204 | if( p < pmi ) |
---|
| 1205 | { |
---|
| 1206 | G4double p2 = p*p; |
---|
| 1207 | elasticXsc = 1./( .00012 + p2*( .051 + .1*p2)); |
---|
| 1208 | totalXsc = elasticXsc; |
---|
| 1209 | } |
---|
| 1210 | else if( p > pma ) |
---|
| 1211 | { |
---|
| 1212 | G4double lp = std::log(p) - lmi; |
---|
| 1213 | G4double lp2 = lp*lp; |
---|
| 1214 | elasticXsc = pbe*lp2 + 6.72; |
---|
| 1215 | totalXsc = pbt*lp2 + 38.2; |
---|
| 1216 | } |
---|
| 1217 | else |
---|
| 1218 | { |
---|
| 1219 | G4double p2 = p*p; |
---|
| 1220 | G4double LE = 1./( .00012 + p2*( .051 + .1*p2 ) ); |
---|
| 1221 | G4double lp = std::log(p) - lmi; |
---|
| 1222 | G4double lp2 = lp*lp; |
---|
| 1223 | G4double rp2 = 1./p2; |
---|
| 1224 | elasticXsc = LE + (pbe*lp2 + 6.72 + 30./p)/( 1. + .49*rp2/p); |
---|
| 1225 | totalXsc = LE + (pbt*lp2 + 38.2)/( 1. + .54*rp2*rp2); |
---|
| 1226 | } |
---|
| 1227 | } |
---|
| 1228 | else if( I == 2 ) // pimp/pipn |
---|
| 1229 | { |
---|
| 1230 | G4double lp = std::log(p); |
---|
| 1231 | |
---|
| 1232 | if(p<pmi) |
---|
| 1233 | { |
---|
| 1234 | G4double lr = lp + 1.27; |
---|
| 1235 | elasticXsc = 1.53/( lr*lr + .0676); |
---|
| 1236 | totalXsc = elasticXsc*3; |
---|
| 1237 | } |
---|
| 1238 | else if( p > pma ) |
---|
| 1239 | { |
---|
| 1240 | G4double ld = lp - lmi; |
---|
| 1241 | G4double ld2 = ld*ld; |
---|
| 1242 | G4double sp = std::sqrt(p); |
---|
| 1243 | elasticXsc = pbe*ld2 + 2.4 + 7./sp; |
---|
| 1244 | totalXsc = pbt*ld2 + 22.3 + 12./sp; |
---|
| 1245 | } |
---|
| 1246 | else |
---|
| 1247 | { |
---|
| 1248 | G4double lr = lp + 1.27; |
---|
| 1249 | G4double LE = 1.53/( lr*lr + .0676); |
---|
| 1250 | G4double ld = lp - lmi; |
---|
| 1251 | G4double ld2 = ld*ld; |
---|
| 1252 | G4double p2 = p*p; |
---|
| 1253 | G4double p4 = p2*p2; |
---|
| 1254 | G4double sp = std::sqrt(p); |
---|
| 1255 | G4double lm = lp + .36; |
---|
| 1256 | G4double md = lm*lm + .04; |
---|
| 1257 | G4double lh = lp - .017; |
---|
| 1258 | G4double hd = lh*lh + .0025; |
---|
| 1259 | elasticXsc = LE + (pbe*ld2 + 2.4 + 7./sp)/( 1. + .7/p4) + .6/md + .05/hd; |
---|
| 1260 | totalXsc = LE*3 + (pbt*ld2 + 22.3 + 12./sp)/(1. + .4/p4) + 1./md + .06/hd; |
---|
| 1261 | } |
---|
| 1262 | } |
---|
| 1263 | else if( I == 3 ) // pipp/pimn |
---|
| 1264 | { |
---|
| 1265 | G4double lp = std::log(p); |
---|
| 1266 | |
---|
| 1267 | if( p < pmi ) |
---|
| 1268 | { |
---|
| 1269 | G4double lr = lp + 1.27; |
---|
| 1270 | G4double lr2 = lr*lr; |
---|
| 1271 | elasticXsc = 13./( lr2 + lr2*lr2 + .0676); |
---|
| 1272 | totalXsc = elasticXsc; |
---|
| 1273 | } |
---|
| 1274 | else if( p > pma ) |
---|
| 1275 | { |
---|
| 1276 | G4double ld = lp - lmi; |
---|
| 1277 | G4double ld2 = ld*ld; |
---|
| 1278 | G4double sp = std::sqrt(p); |
---|
| 1279 | elasticXsc = pbe*ld2 + 2.4 + 6./sp; |
---|
| 1280 | totalXsc = pbt*ld2 + 22.3 + 5./sp; |
---|
| 1281 | } |
---|
| 1282 | else |
---|
| 1283 | { |
---|
| 1284 | G4double lr = lp + 1.27; |
---|
| 1285 | G4double lr2 = lr*lr; |
---|
| 1286 | G4double LE = 13./(lr2 + lr2*lr2 + .0676); |
---|
| 1287 | G4double ld = lp - lmi; |
---|
| 1288 | G4double ld2 = ld*ld; |
---|
| 1289 | G4double p2 = p*p; |
---|
| 1290 | G4double p4 = p2*p2; |
---|
| 1291 | G4double sp = std::sqrt(p); |
---|
| 1292 | G4double lm = lp - .32; |
---|
| 1293 | G4double md = lm*lm + .0576; |
---|
| 1294 | elasticXsc = LE + (pbe*ld2 + 2.4 + 6./sp)/(1. + 3./p4) + .7/md; |
---|
| 1295 | totalXsc = LE + (pbt*ld2 + 22.3 + 5./sp)/(1. + 1./p4) + .8/md; |
---|
| 1296 | } |
---|
| 1297 | } |
---|
| 1298 | else if( I == 4 ) // Kmp/Kmn/K0p/K0n |
---|
| 1299 | { |
---|
| 1300 | if( p < pmi) |
---|
| 1301 | { |
---|
| 1302 | G4double psp = p*std::sqrt(p); |
---|
| 1303 | elasticXsc = 5.2/psp; |
---|
| 1304 | totalXsc = 14./psp; |
---|
| 1305 | } |
---|
| 1306 | else if( p > pma ) |
---|
| 1307 | { |
---|
| 1308 | G4double ld = std::log(p) - lmi; |
---|
| 1309 | G4double ld2 = ld*ld; |
---|
| 1310 | elasticXsc = pbe*ld2 + 2.23; |
---|
| 1311 | totalXsc = pbt*ld2 + 19.5; |
---|
| 1312 | } |
---|
| 1313 | else |
---|
| 1314 | { |
---|
| 1315 | G4double ld = std::log(p) - lmi; |
---|
| 1316 | G4double ld2 = ld*ld; |
---|
| 1317 | G4double sp = std::sqrt(p); |
---|
| 1318 | G4double psp = p*sp; |
---|
| 1319 | G4double p2 = p*p; |
---|
| 1320 | G4double p4 = p2*p2; |
---|
| 1321 | G4double lm = p - .39; |
---|
| 1322 | G4double md = lm*lm + .000156; |
---|
| 1323 | G4double lh = p - 1.; |
---|
| 1324 | G4double hd = lh*lh + .0156; |
---|
| 1325 | elasticXsc = 5.2/psp + (pbe*ld2 + 2.23)/(1. - .7/sp + .075/p4) + .004/md + .15/hd; |
---|
| 1326 | totalXsc = 14./psp + (pbt*ld2 + 19.5)/(1. - .21/sp + .52/p4) + .006/md + .30/hd; |
---|
| 1327 | } |
---|
| 1328 | } |
---|
| 1329 | else if( I == 5 ) // Kpp/Kpn/aKp/aKn |
---|
| 1330 | { |
---|
| 1331 | if( p < pmi ) |
---|
| 1332 | { |
---|
| 1333 | G4double lr = p - .38; |
---|
| 1334 | G4double lm = p - 1.; |
---|
| 1335 | G4double md = lm*lm + .372; |
---|
| 1336 | elasticXsc = .7/(lr*lr + .0676) + 2./md; |
---|
| 1337 | totalXsc = elasticXsc + .6/md; |
---|
| 1338 | } |
---|
| 1339 | else if( p > pma ) |
---|
| 1340 | { |
---|
| 1341 | G4double ld = std::log(p) - lmi; |
---|
| 1342 | G4double ld2 = ld*ld; |
---|
| 1343 | elasticXsc = pbe*ld2 + 2.23; |
---|
| 1344 | totalXsc = pbt*ld2 + 19.5; |
---|
| 1345 | } |
---|
| 1346 | else |
---|
| 1347 | { |
---|
| 1348 | G4double ld = std::log(p) - lmi; |
---|
| 1349 | G4double ld2 = ld*ld; |
---|
| 1350 | G4double lr = p - .38; |
---|
| 1351 | G4double LE = .7/(lr*lr + .0676); |
---|
| 1352 | G4double sp = std::sqrt(p); |
---|
| 1353 | G4double p2 = p*p; |
---|
| 1354 | G4double p4 = p2*p2; |
---|
| 1355 | G4double lm = p - 1.; |
---|
| 1356 | G4double md = lm*lm + .372; |
---|
| 1357 | elasticXsc = LE + (pbe*ld2 + 2.23)/(1. - .7/sp + .1/p4) + 2./md; |
---|
| 1358 | totalXsc = LE + (pbt*ld2 + 19.5)/(1. + .46/sp + 1.6/p4) + 2.6/md; |
---|
| 1359 | } |
---|
| 1360 | } |
---|
| 1361 | else if( I == 6 ) // hyperon-N |
---|
| 1362 | { |
---|
| 1363 | if( p < pmi ) |
---|
| 1364 | { |
---|
| 1365 | G4double p2 = p*p; |
---|
| 1366 | elasticXsc = 1./(.002 + p2*(.12 + p2)); |
---|
| 1367 | totalXsc = elasticXsc; |
---|
| 1368 | } |
---|
| 1369 | else if( p > pma ) |
---|
| 1370 | { |
---|
| 1371 | G4double lp = std::log(p) - lmi; |
---|
| 1372 | G4double lp2 = lp*lp; |
---|
| 1373 | G4double sp = std::sqrt(p); |
---|
| 1374 | elasticXsc = (pbe*lp2 + 6.72)/(1. + 2./sp); |
---|
| 1375 | totalXsc = (pbt*lp2 + 38.2 + 900./sp)/(1. + 27./sp); |
---|
| 1376 | } |
---|
| 1377 | else |
---|
| 1378 | { |
---|
| 1379 | G4double p2 = p*p; |
---|
| 1380 | G4double LE = 1./(.002 + p2*(.12 + p2)); |
---|
| 1381 | G4double lp = std::log(p) - lmi; |
---|
| 1382 | G4double lp2 = lp*lp; |
---|
| 1383 | G4double p4 = p2*p2; |
---|
| 1384 | G4double sp = std::sqrt(p); |
---|
| 1385 | elasticXsc = LE + (pbe*lp2 + 6.72 + 99./p2)/(1. + 2./sp + 2./p4); |
---|
| 1386 | totalXsc = LE + (pbt*lp2 + 38.2 + 900./sp)/(1. + 27./sp + 3./p4); |
---|
| 1387 | } |
---|
| 1388 | } |
---|
| 1389 | else if( I == 7 ) // antibaryon-N |
---|
| 1390 | { |
---|
| 1391 | if( p > pma ) |
---|
| 1392 | { |
---|
| 1393 | G4double lp = std::log(p) - lmi; |
---|
| 1394 | G4double lp2 = lp*lp; |
---|
| 1395 | elasticXsc = pbe*lp2 + 6.72; |
---|
| 1396 | totalXsc = pbt*lp2 + 38.2; |
---|
| 1397 | } |
---|
| 1398 | else |
---|
| 1399 | { |
---|
| 1400 | G4double ye = std::pow(p, 1.25); |
---|
| 1401 | G4double yt = std::pow(p, .35); |
---|
| 1402 | G4double lp = std::log(p) - lmi; |
---|
| 1403 | G4double lp2 = lp*lp; |
---|
| 1404 | elasticXsc = 80./(ye + 1.) + pbe*lp2 + 6.72; |
---|
| 1405 | totalXsc = (80./yt + .3)/yt +pbt*lp2 + 38.2; |
---|
| 1406 | } |
---|
| 1407 | } |
---|
| 1408 | else |
---|
| 1409 | { |
---|
| 1410 | G4cout<<"PDG incoding = "<<I<<" is not defined (0-7)"<<G4endl; |
---|
| 1411 | |
---|
| 1412 | } |
---|
| 1413 | if( elasticXsc > totalXsc ) elasticXsc = totalXsc; |
---|
| 1414 | |
---|
| 1415 | totalXsc *= millibarn; |
---|
| 1416 | elasticXsc *= millibarn; |
---|
| 1417 | inelasticXsc = totalXsc - elasticXsc; |
---|
| 1418 | if (inelasticXsc < 0.) inelasticXsc = 0.; |
---|
| 1419 | |
---|
| 1420 | return inelasticXsc; |
---|
| 1421 | } |
---|
| 1422 | |
---|
| 1423 | //////////////////////////////////////////////////////////////////////////////////// |
---|
| 1424 | // |
---|
| 1425 | // |
---|
| 1426 | |
---|
| 1427 | G4double |
---|
| 1428 | G4GlauberGribovCrossSection::GetNucleusRadius( const G4DynamicParticle* , |
---|
| 1429 | const G4Element* anElement) |
---|
| 1430 | { |
---|
| 1431 | G4double At = anElement->GetN(); |
---|
| 1432 | G4double oneThird = 1.0/3.0; |
---|
| 1433 | G4double cubicrAt = std::pow (At, oneThird); |
---|
| 1434 | |
---|
| 1435 | |
---|
| 1436 | G4double R; // = fRadiusConst*cubicrAt; |
---|
| 1437 | /* |
---|
| 1438 | G4double tmp = std::pow( cubicrAt-1., 3.); |
---|
| 1439 | tmp += At; |
---|
| 1440 | tmp *= 0.5; |
---|
| 1441 | |
---|
| 1442 | if (At > 20.) // 20. |
---|
| 1443 | { |
---|
| 1444 | R = fRadiusConst*std::pow (tmp, oneThird); |
---|
| 1445 | } |
---|
| 1446 | else |
---|
| 1447 | { |
---|
| 1448 | R = fRadiusConst*cubicrAt; |
---|
| 1449 | } |
---|
| 1450 | */ |
---|
| 1451 | |
---|
| 1452 | R = fRadiusConst*cubicrAt; |
---|
| 1453 | |
---|
| 1454 | // return R; // !!!! |
---|
| 1455 | |
---|
| 1456 | |
---|
| 1457 | |
---|
| 1458 | G4double meanA = 21.; |
---|
| 1459 | |
---|
| 1460 | G4double tauA1 = 40.; |
---|
| 1461 | G4double tauA2 = 10.; |
---|
| 1462 | G4double tauA3 = 5.; |
---|
| 1463 | |
---|
| 1464 | G4double a1 = 0.85; |
---|
| 1465 | G4double b1 = 1. - a1; |
---|
| 1466 | |
---|
| 1467 | G4double b2 = 0.3; |
---|
| 1468 | G4double b3 = 4.; |
---|
| 1469 | |
---|
| 1470 | if (At > 20.) // 20. |
---|
| 1471 | { |
---|
| 1472 | R *= ( a1 + b1*std::exp( -(At - meanA)/tauA1) ); |
---|
| 1473 | } |
---|
| 1474 | else if (At > 3.5) |
---|
| 1475 | { |
---|
| 1476 | R *= ( 1.0 + b2*( 1. - std::exp( (At - meanA)/tauA2) ) ); |
---|
| 1477 | } |
---|
| 1478 | else |
---|
| 1479 | { |
---|
| 1480 | R *= ( 1.0 + b3*( 1. - std::exp( (At - meanA)/tauA3) ) ); |
---|
| 1481 | } |
---|
| 1482 | return R; |
---|
| 1483 | |
---|
| 1484 | } |
---|
| 1485 | //////////////////////////////////////////////////////////////////////////////////// |
---|
| 1486 | // |
---|
| 1487 | // |
---|
| 1488 | |
---|
| 1489 | G4double |
---|
| 1490 | G4GlauberGribovCrossSection::GetNucleusRadius(G4double At) |
---|
| 1491 | { |
---|
| 1492 | G4double oneThird = 1.0/3.0; |
---|
| 1493 | G4double cubicrAt = std::pow (At, oneThird); |
---|
| 1494 | |
---|
| 1495 | |
---|
| 1496 | G4double R; // = fRadiusConst*cubicrAt; |
---|
| 1497 | |
---|
| 1498 | /* |
---|
| 1499 | G4double tmp = std::pow( cubicrAt-1., 3.); |
---|
| 1500 | tmp += At; |
---|
| 1501 | tmp *= 0.5; |
---|
| 1502 | |
---|
| 1503 | if (At > 20.) |
---|
| 1504 | { |
---|
| 1505 | R = fRadiusConst*std::pow (tmp, oneThird); |
---|
| 1506 | } |
---|
| 1507 | else |
---|
| 1508 | { |
---|
| 1509 | R = fRadiusConst*cubicrAt; |
---|
| 1510 | } |
---|
| 1511 | */ |
---|
| 1512 | |
---|
| 1513 | R = fRadiusConst*cubicrAt; |
---|
| 1514 | |
---|
| 1515 | G4double meanA = 20.; |
---|
| 1516 | G4double tauA = 20.; |
---|
| 1517 | |
---|
| 1518 | if (At > 20.) // 20. |
---|
| 1519 | { |
---|
| 1520 | R *= ( 0.8 + 0.2*std::exp( -(At - meanA)/tauA) ); |
---|
| 1521 | } |
---|
| 1522 | else |
---|
| 1523 | { |
---|
| 1524 | R *= ( 1.0 + 0.1*( 1. - std::exp( (At - meanA)/tauA) ) ); |
---|
| 1525 | } |
---|
| 1526 | |
---|
| 1527 | return R; |
---|
| 1528 | } |
---|
| 1529 | |
---|
| 1530 | //////////////////////////////////////////////////////////////////////////////////// |
---|
| 1531 | // |
---|
| 1532 | // |
---|
| 1533 | |
---|
| 1534 | G4double G4GlauberGribovCrossSection::CalculateEcmValue( const G4double mp , |
---|
| 1535 | const G4double mt , |
---|
| 1536 | const G4double Plab ) |
---|
| 1537 | { |
---|
| 1538 | G4double Elab = std::sqrt ( mp * mp + Plab * Plab ); |
---|
| 1539 | G4double Ecm = std::sqrt ( mp * mp + mt * mt + 2 * Elab * mt ); |
---|
| 1540 | // G4double Pcm = Plab * mt / Ecm; |
---|
| 1541 | // G4double KEcm = std::sqrt ( Pcm * Pcm + mp * mp ) - mp; |
---|
| 1542 | |
---|
| 1543 | return Ecm ; // KEcm; |
---|
| 1544 | } |
---|
| 1545 | |
---|
| 1546 | |
---|
| 1547 | //////////////////////////////////////////////////////////////////////////////////// |
---|
| 1548 | // |
---|
| 1549 | // |
---|
| 1550 | |
---|
| 1551 | G4double G4GlauberGribovCrossSection::CalcMandelstamS( const G4double mp , |
---|
| 1552 | const G4double mt , |
---|
| 1553 | const G4double Plab ) |
---|
| 1554 | { |
---|
| 1555 | G4double Elab = std::sqrt ( mp * mp + Plab * Plab ); |
---|
| 1556 | G4double sMand = mp*mp + mt*mt + 2*Elab*mt ; |
---|
| 1557 | |
---|
| 1558 | return sMand; |
---|
| 1559 | } |
---|
| 1560 | |
---|
| 1561 | |
---|
| 1562 | // |
---|
| 1563 | // |
---|
| 1564 | /////////////////////////////////////////////////////////////////////////////////////// |
---|