[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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[961] | 26 | // $Id: G4eeCrossSections.cc,v 1.7 2008/07/10 18:06:39 vnivanch Exp $ |
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[1337] | 27 | // GEANT4 tag $Name: geant4-09-04-beta-01 $ |
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[819] | 28 | // |
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| 29 | // ------------------------------------------------------------------- |
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| 30 | // |
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| 31 | // GEANT4 Class header file |
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| 32 | // |
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| 33 | // |
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| 34 | // File name: G4eeCrossSections |
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| 35 | // |
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| 36 | // Author: Vladimir Ivanchenko |
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| 37 | // |
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| 38 | // Creation date: 25.10.2003 |
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| 39 | // |
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| 40 | // Modifications: |
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[961] | 41 | // 10.07.2008 Updated for PDG Jour. Physics, G33, 1 (2006) |
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[819] | 42 | // |
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| 43 | // ------------------------------------------------------------------- |
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| 44 | // |
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| 45 | |
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| 46 | |
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| 47 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 48 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 49 | |
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| 50 | #include "G4eeCrossSections.hh" |
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| 51 | #include "G4PionPlus.hh" |
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| 52 | #include "G4PionMinus.hh" |
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| 53 | #include "G4PionZero.hh" |
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[961] | 54 | #include "G4Eta.hh" |
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[819] | 55 | #include "G4KaonPlus.hh" |
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| 56 | #include "G4KaonMinus.hh" |
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| 57 | #include "G4KaonZeroLong.hh" |
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| 58 | #include "G4PhysicsLinearVector.hh" |
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| 59 | |
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| 60 | #include <iostream> |
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| 61 | #include <fstream> |
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| 62 | |
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| 63 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 64 | |
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| 65 | using namespace std; |
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| 66 | |
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| 67 | G4eeCrossSections::G4eeCrossSections() |
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| 68 | { |
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| 69 | Initialise(); |
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| 70 | } |
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| 71 | |
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| 72 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 73 | |
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| 74 | G4eeCrossSections::~G4eeCrossSections() |
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| 75 | {} |
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| 76 | |
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| 77 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 78 | |
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| 79 | void G4eeCrossSections::Initialise() |
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| 80 | { |
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| 81 | MsPi = G4PionPlus::PionPlus()->GetPDGMass(); |
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| 82 | MsPi0= G4PionZero::PionZero()->GetPDGMass(); |
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[961] | 83 | MsEta= G4Eta::Eta()->GetPDGMass(); |
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[819] | 84 | MsEtap=957.78*MeV; |
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| 85 | MsKs = G4KaonZeroLong::KaonZeroLong()->GetPDGMass(); |
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[961] | 86 | MsKc = G4KaonPlus::KaonPlus()->GetPDGMass(); |
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| 87 | MsRho= 775.5*MeV; |
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| 88 | MsOm = 782.62*MeV; |
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[819] | 89 | MsF0 = 980.0*MeV; |
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[961] | 90 | MsA0 = 984.7*MeV; |
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| 91 | MsPhi= 1019.46*MeV; |
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[819] | 92 | MsK892 = 891.66*MeV; |
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[961] | 93 | MsK0892 = 896.0*MeV; |
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| 94 | GRho = 149.4*MeV; |
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| 95 | GOm = 8.49*MeV; |
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| 96 | GPhi = 4.26*MeV; |
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[819] | 97 | GK892 = 50.8*MeV; |
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[961] | 98 | GK0892 = 50.3*MeV; |
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[819] | 99 | PhRho = 0.0; |
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| 100 | PhOm = 0.0; |
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| 101 | PhPhi = 155.0*degree; |
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| 102 | PhRhoPi = 186.0*degree; |
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| 103 | |
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| 104 | BrRhoPiG = 4.5e-4; |
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| 105 | BrRhoPi0G= 6.8e-4; |
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[961] | 106 | BrRhoEtaG= 2.95e-4; |
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| 107 | BrRhoEe = 4.7e-5; |
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| 108 | BrOm3Pi = 0.891; |
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| 109 | BrOmPi0G= 0.089; |
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| 110 | BrOmEtaG= 4.9e-4; |
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| 111 | BrOm2Pi = 0.017; |
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[819] | 112 | PhOm2Pi = 90.0; |
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[961] | 113 | BrOmEe = 7.18e-5; |
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| 114 | BrPhi2Kc = 0.492; |
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| 115 | BrPhiKsKl= 0.34; |
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| 116 | BrPhi3Pi = 0.153; |
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| 117 | BrPhiPi0G= 1.25e-3; |
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| 118 | BrPhiEtaG= 1.301e-2; |
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| 119 | BrPhi2Pi = 7.3e-5; |
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[819] | 120 | PhPhi2Pi = -20.0*degree; |
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[961] | 121 | BrPhiEe = 2.97e-4; |
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[819] | 122 | |
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| 123 | MsRho3 = MsRho*MsRho*MsRho; |
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| 124 | MsOm3 = MsOm*MsOm*MsOm; |
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| 125 | MsPhi3 = MsPhi*MsPhi*MsPhi; |
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| 126 | |
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| 127 | MeVnb = 3.8938e+11*nanobarn; |
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[961] | 128 | Alpha = fine_structure_const; |
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[819] | 129 | |
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| 130 | AOmRho = 3.0; |
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| 131 | ARhoPRho = 0.72; |
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| 132 | cterm=0.; |
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| 133 | mssig = 600.*MeV; |
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| 134 | gsig = 500.*MeV; |
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| 135 | brsigpipi = 1.; |
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| 136 | |
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[961] | 137 | msrho1450 = 1459.*MeV; |
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| 138 | msrho1700 = 1688.8*MeV; |
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| 139 | grho1450 = 171.*MeV; |
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| 140 | grho1700 = 161.*MeV; |
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[819] | 141 | arhoompi0 = 1.; |
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| 142 | arho1450ompi0 = 1.; |
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| 143 | arho1700ompi0 = 1.; |
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| 144 | phrhoompi0 = 0.; |
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| 145 | phrho1450ompi0 = pi; |
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| 146 | phrho1700ompi0 = 0.; |
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| 147 | aomrhopi0 = 1.; |
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| 148 | phomrhopi0 = 0.; |
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| 149 | arhopi0pi0g = 0.; |
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| 150 | aompi0pi0g = 0.; |
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| 151 | phrhopi0pi0g = 0.; |
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| 152 | phompi0pi0g = 0.; |
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| 153 | brrho1450ompi0 = 0.02; |
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| 154 | brrho1450pipi = 0.50; |
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| 155 | brrho1700ompi0 = 1.0; |
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| 156 | brrho1700pipi = 0.02; |
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| 157 | aphirhopi0 = 1.; |
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| 158 | phphirhopi0 = pi; |
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| 159 | arhosigg = 0.; |
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| 160 | phrhosigg = 0.; |
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| 161 | aomsigg = 0.; |
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| 162 | phomsigg = 0.; |
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| 163 | |
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| 164 | G4String w0, w1, w2; |
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| 165 | ph3p = 0; |
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| 166 | |
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| 167 | /* |
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| 168 | G4double emin, emax; |
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| 169 | G4int nbins; |
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| 170 | const G4String fname = "wrhopi.wid"; |
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| 171 | ifstream fi(fname.c_str()); |
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| 172 | fi >> w0 >> nbins >> w1 >> emin >> w2 >> emax; |
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| 173 | emin *= MeV; |
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| 174 | emax *= MeV; |
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| 175 | ph3p = new G4PhysicsLinearVector(emin,emax,nbins); |
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| 176 | G4int nlines = nbins/5; |
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| 177 | G4double s0, s1, s2, s3, s4; |
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| 178 | for(G4int i=0; i<nlines; i++) { |
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| 179 | fi >> s0 >> s1 >> s2 >> s3 >> s4; |
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| 180 | ph3p->PutValue(5*i, s0); |
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| 181 | ph3p->PutValue(5*i + 1, s1); |
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| 182 | ph3p->PutValue(5*i + 2, s2); |
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| 183 | ph3p->PutValue(5*i + 3, s3); |
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| 184 | ph3p->PutValue(5*i + 4, s4); |
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| 185 | } |
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| 186 | fi.close(); |
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| 187 | */ |
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| 188 | } |
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| 189 | |
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| 190 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 191 | |
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| 192 | G4double G4eeCrossSections::CrossSection2pi(G4double e) |
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[961] | 193 | { |
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[819] | 194 | complex<G4double> xr(cos(PhRho),sin(PhRho)); |
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| 195 | complex<G4double> xo(cos(PhOm2Pi),sin(PhOm2Pi)); |
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| 196 | complex<G4double> xf(cos(PhPhi2Pi),sin(PhPhi2Pi)); |
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| 197 | |
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| 198 | G4double s = e*e; |
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| 199 | complex<G4double> drho = DpRho(e); |
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| 200 | complex<G4double> dom = DpOm(e); |
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| 201 | complex<G4double> dphi = DpPhi(e); |
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| 202 | |
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| 203 | complex<G4double> amp = |
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| 204 | sqrt(Width2p(s,MsRho,GRho,1.0,MsPi)*MsRho3*BrRhoEe*GRho)*xr/drho |
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| 205 | + sqrt(Width2p(s,MsOm,GOm,BrOm2Pi,MsPi)*MsOm3*BrOmEe*GOm)*xo/dom |
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| 206 | + sqrt(Width2p(s,MsPhi,GPhi,BrPhi2Pi,MsPi)*MsPhi3*BrPhiEe*GPhi)*xf/dphi; |
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| 207 | |
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| 208 | G4double cross = 12.0*pi*MeVnb*norm(amp)/(e*s); |
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| 209 | |
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| 210 | return cross; |
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| 211 | } |
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| 212 | |
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| 213 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 214 | |
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[961] | 215 | G4double G4eeCrossSections::CrossSection3pi(G4double e) |
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| 216 | { |
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| 217 | complex<G4double> xf(cos(PhPhi2Pi),sin(PhPhi)); |
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| 218 | |
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| 219 | G4double s = e*e; |
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| 220 | complex<G4double> dom = DpOm(e); |
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| 221 | complex<G4double> dphi = DpPhi(e); |
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| 222 | |
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| 223 | complex<G4double> amp = |
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| 224 | sqrt(Width3p(s,MsOm,GOm,BrOm3Pi)*MsOm3*BrOmEe*GOm)/dom |
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| 225 | + sqrt(Width3p(s,MsPhi,GPhi,BrPhi3Pi)*MsPhi3*BrPhiEe*GPhi)*xf/dphi; |
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| 226 | |
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| 227 | G4double cross = 12.0*pi*MeVnb*norm(amp)/(e*s); |
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| 228 | |
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| 229 | return cross; |
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| 230 | } |
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| 231 | |
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| 232 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 233 | |
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| 234 | G4double G4eeCrossSections::CrossSectionPi0G(G4double e) |
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| 235 | { |
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| 236 | complex<G4double> xf(cos(PhPhi),sin(PhPhi)); |
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| 237 | |
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| 238 | G4double s = e*e; |
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| 239 | complex<G4double> drho = DpRho(e); |
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| 240 | complex<G4double> dom = DpOm(e); |
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| 241 | complex<G4double> dphi = DpPhi(e); |
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| 242 | |
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| 243 | complex<G4double> amp = |
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| 244 | sqrt(WidthPg(s,MsRho,GRho,BrRhoPi0G,MsPi0)*MsRho3*BrRhoEe*GRho)/drho |
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| 245 | + sqrt(WidthPg(s,MsOm,GOm,BrOmPi0G,MsPi0)*MsOm3*BrOmEe*GOm)/dom |
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| 246 | + sqrt(WidthPg(s,MsPhi,GPhi,BrPhiPi0G,MsPi0)*MsPhi3*BrPhiEe*GPhi)*xf/dphi; |
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| 247 | |
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| 248 | G4double cross = 12.0*pi*MeVnb*norm(amp)/(e*s); |
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| 249 | |
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| 250 | return cross; |
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| 251 | } |
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| 252 | |
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| 253 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 254 | |
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| 255 | G4double G4eeCrossSections::CrossSectionEtaG(G4double e) |
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| 256 | { |
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| 257 | complex<G4double> xf(cos(PhPhi),sin(PhPhi)); |
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| 258 | |
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| 259 | G4double s = e*e; |
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| 260 | complex<G4double> drho = DpRho(e); |
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| 261 | complex<G4double> dom = DpOm(e); |
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| 262 | complex<G4double> dphi = DpPhi(e); |
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| 263 | |
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| 264 | complex<G4double> amp = |
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| 265 | sqrt(WidthPg(s,MsRho,GRho,BrRhoEtaG,MsEta)*MsRho3*BrRhoEe*GRho)/drho |
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| 266 | + sqrt(WidthPg(s,MsOm,GOm,BrOmEtaG,MsEta)*MsOm3*BrOmEe*GOm)/dom |
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| 267 | + sqrt(WidthPg(s,MsPhi,GPhi,BrPhiEtaG,MsEta)*MsPhi3*BrPhiEe*GPhi)*xf/dphi; |
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| 268 | |
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| 269 | G4double cross = 12.0*pi*MeVnb*norm(amp)/(e*s); |
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| 270 | |
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| 271 | return cross; |
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| 272 | } |
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| 273 | |
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| 274 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 275 | |
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| 276 | G4double G4eeCrossSections::CrossSection2Kcharged(G4double e) |
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| 277 | { |
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| 278 | G4double s = e*e; |
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| 279 | complex<G4double> dphi = DpPhi(e); |
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| 280 | |
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| 281 | complex<G4double> amp = |
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| 282 | sqrt(Width2p(s,MsPhi,GPhi,BrPhi2Kc,MsKc)*MsPhi3*BrPhiEe*GPhi)/dphi; |
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| 283 | |
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| 284 | G4double cross = 12.0*pi*MeVnb*norm(amp)/(e*s); |
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| 285 | |
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| 286 | return cross; |
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| 287 | } |
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| 288 | |
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| 289 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 290 | |
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| 291 | G4double G4eeCrossSections::CrossSection2Kneutral(G4double e) |
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| 292 | { |
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| 293 | G4double s = e*e; |
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| 294 | complex<G4double> dphi = DpPhi(e); |
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| 295 | |
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| 296 | complex<G4double> amp = |
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| 297 | sqrt(Width2p(s,MsPhi,GPhi,BrPhiKsKl,MsKs)*MsPhi3*BrPhiEe*GPhi)/dphi; |
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| 298 | |
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| 299 | G4double cross = 12.0*pi*MeVnb*norm(amp)/(e*s); |
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| 300 | |
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| 301 | return cross; |
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| 302 | } |
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| 303 | |
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| 304 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 305 | |
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[819] | 306 | G4double G4eeCrossSections::Width2p(G4double s, G4double mres, |
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| 307 | G4double g, G4double br, G4double m) |
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| 308 | { |
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| 309 | G4double m2 = 4.0*m*m; |
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| 310 | G4double s0 = mres*mres; |
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| 311 | G4double f = (s - m2)/(s0 - m2); |
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| 312 | if(f < 0.0) f = 0.0; |
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| 313 | return g*br*sqrt(f)*f*s0/s; |
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| 314 | } |
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| 315 | |
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| 316 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 317 | |
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| 318 | G4double G4eeCrossSections::Width3p(G4double s, G4double mres, |
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| 319 | G4double g, G4double br) |
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| 320 | { |
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| 321 | G4double w = PhaseSpace3p(sqrt(s)); |
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| 322 | G4double w0= PhaseSpace3p(mres); |
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| 323 | G4double x = g*br*w/w0; |
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| 324 | return x; |
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| 325 | } |
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| 326 | |
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| 327 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 328 | |
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| 329 | G4double G4eeCrossSections::PhaseSpace3p(G4double e) |
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| 330 | { |
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[961] | 331 | // E.A.Kuraev, Z.K.Silagadze. |
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| 332 | // Once more about the omega->3 pi contact term. |
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| 333 | // Yadernaya Phisica, 1995, V58, N9, p.1678-1694. |
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| 334 | |
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[819] | 335 | // G4bool b; |
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| 336 | // G4double x = ph3p->GetValue(e, b); |
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| 337 | G4double x = 1.0; |
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| 338 | G4double emev = e/MeV; |
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| 339 | G4double y = 414.12/emev; |
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| 340 | x *= pow(e/MsOm, 5.0) * pow(emev*0.1, 3.0)*(1.0 - y*y); |
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| 341 | return x; |
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| 342 | } |
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| 343 | |
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| 344 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 345 | |
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| 346 | G4double G4eeCrossSections::WidthPg(G4double s, G4double mres, |
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| 347 | G4double g, G4double br, G4double m) |
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| 348 | { |
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| 349 | G4double m2 = m*m; |
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| 350 | G4double s0 = mres*mres; |
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| 351 | G4double f = (s - m2)*mres/((s0 - m2)*sqrt(s)); |
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| 352 | if(f < 0.0) f = 0.0; |
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| 353 | return g*br*f*f*f; |
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| 354 | } |
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| 355 | |
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| 356 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 357 | |
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| 358 | G4double G4eeCrossSections::WidthRho(G4double e) |
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| 359 | { |
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| 360 | G4double w = Width2p(e*e, MsRho, GRho, 1.0, MsPi); |
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| 361 | return w; |
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| 362 | } |
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| 363 | |
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| 364 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 365 | |
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| 366 | G4double G4eeCrossSections::WidthOm(G4double e) |
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| 367 | { |
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| 368 | G4double s = e*e; |
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| 369 | G4double w = (Width3p(s, MsOm, GOm, BrOm3Pi) + |
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| 370 | WidthPg(s, MsOm, GOm, BrOmPi0G, MsPi0) + |
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| 371 | WidthPg(s, MsOm, GOm, BrOmEtaG, MsEta) + |
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| 372 | Width2p(s, MsOm, GOm, BrOm2Pi, MsPi)) / |
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| 373 | (BrOm3Pi+BrOmPi0G+BrOmEtaG+BrOm2Pi); |
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| 374 | return w; |
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| 375 | } |
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| 376 | |
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| 377 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 378 | |
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| 379 | G4double G4eeCrossSections::WidthPhi(G4double e) |
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| 380 | { |
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| 381 | G4double s = e*e; |
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| 382 | G4double w = (Width3p(s, MsPhi, GPhi, BrPhi3Pi) + |
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| 383 | WidthPg(s, MsPhi, GPhi, BrPhiPi0G, MsPi0) + |
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| 384 | WidthPg(s, MsPhi, GPhi, BrPhiEtaG, MsEta) + |
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| 385 | Width2p(s, MsPhi, GPhi, BrPhi2Kc, MsKc) + |
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| 386 | Width2p(s, MsPhi, GPhi, BrPhiKsKl, MsKs)) / |
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| 387 | (BrPhi3Pi+BrPhiPi0G+BrPhiEtaG+BrPhi2Kc+BrPhiKsKl); |
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| 388 | return w; |
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| 389 | } |
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| 390 | |
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| 391 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 392 | |
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| 393 | complex<G4double> G4eeCrossSections::DpRho(G4double e) |
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| 394 | { |
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| 395 | complex<G4double> d(MsRho*MsRho - e*e, -e*WidthRho(e)); |
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| 396 | return d; |
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| 397 | } |
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| 398 | |
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| 399 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 400 | |
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| 401 | complex<G4double> G4eeCrossSections::DpOm(G4double e) |
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| 402 | { |
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| 403 | complex<G4double> d(MsOm*MsOm - e*e, -e*WidthOm(e)); |
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| 404 | return d; |
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| 405 | } |
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| 406 | |
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| 407 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 408 | |
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| 409 | complex<G4double> G4eeCrossSections::DpPhi(G4double e) |
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| 410 | { |
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| 411 | complex<G4double> d(MsPhi*MsPhi - e*e, -e*WidthPhi(e)); |
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| 412 | return d; |
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| 413 | } |
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| 414 | |
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| 415 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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