1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: G4LundStringFragmentation.cc,v 1.23 2010/09/22 12:36:37 vuzhinsk Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-03-ref-09 $ 1.8 |
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29 | // |
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30 | // ----------------------------------------------------------------------------- |
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31 | // GEANT 4 class implementation file |
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32 | // |
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33 | // History: first implementation, Maxim Komogorov, 10-Jul-1998 |
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34 | // ----------------------------------------------------------------------------- |
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35 | #include "G4LundStringFragmentation.hh" |
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36 | #include "G4FragmentingString.hh" |
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37 | #include "G4DiQuarks.hh" |
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38 | #include "G4Quarks.hh" |
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39 | |
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40 | #include "Randomize.hh" |
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41 | |
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42 | // Class G4LundStringFragmentation |
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43 | //************************************************************************************* |
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44 | |
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45 | G4LundStringFragmentation::G4LundStringFragmentation() |
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46 | { |
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47 | // ------ For estimation of a minimal string mass --------------- |
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48 | Mass_of_light_quark =140.*MeV; |
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49 | Mass_of_heavy_quark =500.*MeV; |
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50 | Mass_of_string_junction=720.*MeV; |
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51 | // ------ An estimated minimal string mass ---------------------- |
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52 | MinimalStringMass = 0.; |
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53 | MinimalStringMass2 = 0.; |
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54 | // ------ Minimal invariant mass used at a string fragmentation - |
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55 | WminLUND = 0.45*GeV; //0.23*GeV; // Uzhi 0.7 -> 0.23 3.8.10 //0.8 1.5 |
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56 | // ------ Smooth parameter used at a string fragmentation for --- |
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57 | // ------ smearinr sharp mass cut-off --------------------------- |
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58 | SmoothParam = 0.2; |
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59 | |
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60 | // SetStringTensionParameter(0.25); |
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61 | SetStringTensionParameter(1.); |
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62 | |
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63 | SetDiquarkBreakProbability(0.05); // Vova Aug. 22 |
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64 | |
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65 | // For treating of small string decays |
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66 | for(G4int i=0; i<3; i++) |
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67 | { for(G4int j=0; j<3; j++) |
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68 | { for(G4int k=0; k<6; k++) |
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69 | { Meson[i][j][k]=0; MesonWeight[i][j][k]=0.; |
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70 | } |
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71 | } |
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72 | } |
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73 | //-------------------------- |
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74 | Meson[0][0][0]=111; // dbar-d Pi0 |
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75 | MesonWeight[0][0][0]=pspin_meson*(1.-scalarMesonMix[0]); |
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76 | |
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77 | Meson[0][0][1]=221; // dbar-d Eta |
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78 | MesonWeight[0][0][1]=pspin_meson*(scalarMesonMix[0]-scalarMesonMix[1]); |
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79 | |
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80 | Meson[0][0][2]=331; // dbar-d EtaPrime |
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81 | MesonWeight[0][0][2]=pspin_meson*(scalarMesonMix[1]); |
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82 | |
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83 | Meson[0][0][3]=113; // dbar-d Rho0 |
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84 | MesonWeight[0][0][3]=(1.-pspin_meson)*(1.-vectorMesonMix[0]); |
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85 | |
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86 | Meson[0][0][4]=223; // dbar-d Omega |
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87 | MesonWeight[0][0][4]=(1.-pspin_meson)*(vectorMesonMix[0]); |
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88 | //-------------------------- |
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89 | |
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90 | Meson[0][1][0]=211; // dbar-u Pi+ |
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91 | MesonWeight[0][1][0]=pspin_meson; |
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92 | |
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93 | Meson[0][1][1]=213; // dbar-u Rho+ |
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94 | MesonWeight[0][1][1]=(1.-pspin_meson); |
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95 | //-------------------------- |
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96 | |
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97 | Meson[0][2][0]=311; // dbar-s K0bar |
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98 | MesonWeight[0][2][0]=pspin_meson; |
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99 | |
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100 | Meson[0][2][1]=313; // dbar-s K*0bar |
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101 | MesonWeight[0][2][1]=(1.-pspin_meson); |
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102 | //-------------------------- |
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103 | //-------------------------- |
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104 | Meson[1][0][0]=211; // ubar-d Pi- |
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105 | MesonWeight[1][0][0]=pspin_meson; |
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106 | |
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107 | Meson[1][0][1]=213; // ubar-d Rho- |
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108 | MesonWeight[1][0][1]=(1.-pspin_meson); |
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109 | //-------------------------- |
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110 | |
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111 | Meson[1][1][0]=111; // ubar-u Pi0 |
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112 | MesonWeight[1][1][0]=pspin_meson*(1.-scalarMesonMix[0]); |
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113 | |
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114 | Meson[1][1][1]=221; // ubar-u Eta |
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115 | MesonWeight[1][1][1]=pspin_meson*(scalarMesonMix[0]-scalarMesonMix[1]); |
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116 | |
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117 | Meson[1][1][2]=331; // ubar-u EtaPrime |
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118 | MesonWeight[1][1][2]=pspin_meson*(scalarMesonMix[1]); |
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119 | |
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120 | Meson[1][1][3]=113; // ubar-u Rho0 |
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121 | MesonWeight[1][1][3]=(1.-pspin_meson)*(1.-vectorMesonMix[0]); |
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122 | |
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123 | Meson[1][1][4]=223; // ubar-u Omega |
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124 | MesonWeight[1][1][4]=(1.-pspin_meson)*(scalarMesonMix[0]); |
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125 | //-------------------------- |
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126 | |
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127 | Meson[1][2][0]=321; // ubar-s K- |
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128 | MesonWeight[1][2][0]=pspin_meson; |
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129 | |
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130 | Meson[1][2][1]=323; // ubar-s K*-bar - |
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131 | MesonWeight[1][2][1]=(1.-pspin_meson); |
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132 | //-------------------------- |
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133 | //-------------------------- |
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134 | |
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135 | Meson[2][0][0]=311; // sbar-d K0 |
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136 | MesonWeight[2][0][0]=pspin_meson; |
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137 | |
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138 | Meson[2][0][1]=313; // sbar-d K*0 |
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139 | MesonWeight[2][0][1]=(1.-pspin_meson); |
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140 | //-------------------------- |
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141 | |
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142 | Meson[2][1][0]=321; // sbar-u K+ |
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143 | MesonWeight[2][1][0]=pspin_meson; |
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144 | |
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145 | Meson[2][1][1]=323; // sbar-u K*+ |
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146 | MesonWeight[2][1][1]=(1.-pspin_meson); |
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147 | //-------------------------- |
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148 | |
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149 | Meson[2][2][0]=221; // sbar-s Eta |
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150 | MesonWeight[2][2][0]=pspin_meson*(1.-scalarMesonMix[5]); |
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151 | |
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152 | Meson[2][2][1]=331; // sbar-s EtaPrime |
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153 | MesonWeight[2][2][1]=pspin_meson*(1.-scalarMesonMix[5]); |
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154 | |
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155 | Meson[2][2][3]=333; // sbar-s EtaPrime |
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156 | MesonWeight[2][2][3]=(1.-pspin_meson)*(vectorMesonMix[5]); |
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157 | //-------------------------- |
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158 | |
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159 | for(G4int i=0; i<3; i++) |
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160 | { for(G4int j=0; j<3; j++) |
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161 | { for(G4int k=0; k<3; k++) |
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162 | { for(G4int l=0; l<4; l++) |
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163 | { Baryon[i][j][k][l]=0; BaryonWeight[i][j][k][l]=0.;} |
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164 | } |
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165 | } |
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166 | } |
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167 | |
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168 | //--------------------------------------- |
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169 | Baryon[0][0][0][0]=1114; // Delta- |
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170 | BaryonWeight[0][0][0][0]=1.; |
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171 | |
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172 | //--------------------------------------- |
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173 | Baryon[0][0][1][0]=2112; // neutron |
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174 | BaryonWeight[0][0][1][0]=pspin_barion; |
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175 | |
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176 | Baryon[0][0][1][1]=2114; // Delta0 |
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177 | BaryonWeight[0][0][1][1]=(1.-pspin_barion); |
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178 | |
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179 | //--------------------------------------- |
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180 | Baryon[0][0][2][0]=3112; // Sigma- |
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181 | BaryonWeight[0][0][2][0]=pspin_barion; |
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182 | |
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183 | Baryon[0][0][2][1]=3114; // Sigma*- |
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184 | BaryonWeight[0][0][2][1]=(1.-pspin_barion); |
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185 | |
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186 | //--------------------------------------- |
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187 | Baryon[0][1][0][0]=2112; // neutron |
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188 | BaryonWeight[0][1][0][0]=pspin_barion; |
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189 | |
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190 | Baryon[0][1][0][1]=2114; // Delta0 |
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191 | BaryonWeight[0][1][0][1]=(1.-pspin_barion); |
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192 | |
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193 | //--------------------------------------- |
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194 | Baryon[0][1][1][0]=2212; // proton |
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195 | BaryonWeight[0][1][1][0]=pspin_barion; |
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196 | |
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197 | Baryon[0][1][1][1]=2214; // Delta+ |
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198 | BaryonWeight[0][1][1][1]=(1.-pspin_barion); |
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199 | |
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200 | //--------------------------------------- |
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201 | Baryon[0][1][2][0]=3122; // Lambda |
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202 | BaryonWeight[0][1][2][0]=pspin_barion*0.5; |
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203 | |
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204 | Baryon[0][1][2][1]=3212; // Sigma0 |
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205 | BaryonWeight[0][1][2][2]=pspin_barion*0.5; |
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206 | |
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207 | Baryon[0][1][2][2]=3214; // Sigma*0 |
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208 | BaryonWeight[0][1][2][2]=(1.-pspin_barion); |
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209 | |
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210 | //--------------------------------------- |
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211 | Baryon[0][2][0][0]=3112; // Sigma- |
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212 | BaryonWeight[0][2][0][0]=pspin_barion; |
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213 | |
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214 | Baryon[0][2][0][1]=3114; // Sigma*- |
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215 | BaryonWeight[0][2][0][1]=(1.-pspin_barion); |
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216 | |
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217 | //--------------------------------------- |
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218 | Baryon[0][2][1][0]=3122; // Lambda |
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219 | BaryonWeight[0][2][1][0]=pspin_barion*0.5; |
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220 | |
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221 | Baryon[0][2][1][1]=3212; // Sigma0 |
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222 | BaryonWeight[0][2][1][1]=pspin_barion*0.5; |
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223 | |
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224 | Baryon[0][2][1][2]=3214; // Sigma*0 |
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225 | BaryonWeight[0][2][1][2]=(1.-pspin_barion); |
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226 | |
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227 | //--------------------------------------- |
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228 | Baryon[0][2][2][0]=3312; // Theta- |
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229 | BaryonWeight[0][2][2][0]=pspin_barion; |
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230 | |
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231 | Baryon[0][2][2][1]=3314; // Theta*- |
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232 | BaryonWeight[0][2][2][1]=(1.-pspin_barion); |
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233 | |
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234 | //--------------------------------------- |
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235 | //--------------------------------------- |
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236 | Baryon[1][0][0][0]=2112; // neutron |
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237 | BaryonWeight[1][0][0][0]=pspin_barion; |
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238 | |
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239 | Baryon[1][0][0][1]=2114; // Delta0 |
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240 | BaryonWeight[1][0][0][1]=(1.-pspin_barion); |
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241 | |
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242 | //--------------------------------------- |
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243 | Baryon[1][0][1][0]=2212; // proton |
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244 | BaryonWeight[1][0][1][0]=pspin_barion; |
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245 | |
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246 | Baryon[1][0][1][1]=2214; // Delta+ |
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247 | BaryonWeight[1][0][1][1]=(1.-pspin_barion); |
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248 | |
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249 | //--------------------------------------- |
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250 | Baryon[1][0][2][0]=3122; // Lambda |
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251 | BaryonWeight[1][0][2][0]=pspin_barion*0.5; |
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252 | |
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253 | Baryon[1][0][2][1]=3212; // Sigma0 |
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254 | BaryonWeight[1][0][2][1]=pspin_barion*0.5; |
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255 | |
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256 | Baryon[1][0][2][2]=3214; // Sigma*0 |
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257 | BaryonWeight[1][0][2][2]=(1.-pspin_barion); |
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258 | |
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259 | //--------------------------------------- |
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260 | Baryon[1][1][0][0]=2212; // proton |
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261 | BaryonWeight[1][1][0][0]=pspin_barion; |
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262 | |
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263 | Baryon[1][1][0][1]=2214; // Delta+ |
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264 | BaryonWeight[1][1][0][1]=(1.-pspin_barion); |
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265 | |
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266 | //--------------------------------------- |
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267 | Baryon[1][1][1][0]=2224; // Delta++ |
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268 | BaryonWeight[1][1][1][0]=1.; |
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269 | |
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270 | //--------------------------------------- |
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271 | Baryon[1][1][2][0]=3222; // Sigma+ |
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272 | BaryonWeight[1][1][2][0]=pspin_barion; |
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273 | |
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274 | Baryon[1][1][2][1]=3224; // Sigma*+ |
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275 | BaryonWeight[1][1][2][1]=(1.-pspin_barion); |
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276 | |
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277 | //--------------------------------------- |
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278 | Baryon[1][2][0][0]=3122; // Lambda |
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279 | BaryonWeight[1][2][0][0]=pspin_barion*0.5; |
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280 | |
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281 | Baryon[1][2][0][1]=3212; // Sigma0 |
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282 | BaryonWeight[1][2][0][1]=pspin_barion*0.5; |
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283 | |
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284 | Baryon[1][2][0][2]=3214; // Sigma*0 |
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285 | BaryonWeight[1][2][0][2]=(1.-pspin_barion); |
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286 | |
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287 | //--------------------------------------- |
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288 | Baryon[1][2][1][0]=3222; // Sigma+ |
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289 | BaryonWeight[1][2][1][0]=pspin_barion; |
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290 | |
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291 | Baryon[1][2][1][1]=3224; // Sigma*+ |
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292 | BaryonWeight[1][2][1][1]=(1.-pspin_barion); |
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293 | |
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294 | //--------------------------------------- |
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295 | Baryon[1][2][2][0]=3322; // Theta0 |
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296 | BaryonWeight[1][2][2][0]=pspin_barion; |
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297 | |
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298 | Baryon[1][2][2][1]=3324; // Theta*0 |
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299 | BaryonWeight[1][2][2][1]=(1.-pspin_barion); |
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300 | |
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301 | //--------------------------------------- |
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302 | //--------------------------------------- |
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303 | Baryon[2][0][0][0]=3112; // Sigma- |
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304 | BaryonWeight[2][0][0][0]=pspin_barion; |
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305 | |
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306 | Baryon[2][0][0][1]=3114; // Sigma*- |
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307 | BaryonWeight[2][0][0][1]=(1.-pspin_barion); |
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308 | |
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309 | //--------------------------------------- |
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310 | Baryon[2][0][1][0]=3122; // Lambda |
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311 | BaryonWeight[2][0][1][0]=pspin_barion*0.5; |
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312 | |
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313 | Baryon[2][0][1][1]=3212; // Sigma0 |
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314 | BaryonWeight[2][0][1][1]=pspin_barion*0.5; |
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315 | |
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316 | Baryon[2][0][1][2]=3214; // Sigma*0 |
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317 | BaryonWeight[2][0][1][2]=(1.-pspin_barion); |
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318 | |
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319 | //--------------------------------------- |
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320 | Baryon[2][0][2][0]=3312; // Sigma- |
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321 | BaryonWeight[2][0][2][0]=pspin_barion; |
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322 | |
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323 | Baryon[2][0][2][1]=3314; // Sigma*- |
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324 | BaryonWeight[2][0][2][1]=(1.-pspin_barion); |
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325 | |
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326 | //--------------------------------------- |
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327 | Baryon[2][1][0][0]=3122; // Lambda |
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328 | BaryonWeight[2][1][0][0]=pspin_barion*0.5; |
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329 | |
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330 | Baryon[2][1][0][1]=3212; // Sigma0 |
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331 | BaryonWeight[2][1][0][1]=pspin_barion*0.5; |
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332 | |
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333 | Baryon[2][1][0][2]=3214; // Sigma*0 |
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334 | BaryonWeight[2][1][0][2]=(1.-pspin_barion); |
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335 | |
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336 | //--------------------------------------- |
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337 | Baryon[2][1][1][0]=3222; // Sigma+ |
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338 | BaryonWeight[2][1][1][0]=pspin_barion; |
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339 | |
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340 | Baryon[2][1][1][1]=3224; // Sigma*+ |
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341 | BaryonWeight[2][1][1][1]=(1.-pspin_barion); |
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342 | |
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343 | //--------------------------------------- |
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344 | Baryon[2][1][2][0]=3322; // Theta0 |
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345 | BaryonWeight[2][1][2][0]=pspin_barion; |
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346 | |
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347 | Baryon[2][1][2][1]=3324; // Theta*0 |
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348 | BaryonWeight[2][1][2][2]=(1.-pspin_barion); |
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349 | |
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350 | //--------------------------------------- |
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351 | Baryon[2][2][0][0]=3312; // Theta- |
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352 | BaryonWeight[2][2][0][0]=pspin_barion; |
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353 | |
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354 | Baryon[2][2][0][1]=3314; // Theta*- |
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355 | BaryonWeight[2][2][0][1]=(1.-pspin_barion); |
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356 | |
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357 | //--------------------------------------- |
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358 | Baryon[2][2][1][0]=3322; // Theta0 |
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359 | BaryonWeight[2][2][1][0]=pspin_barion; |
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360 | |
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361 | Baryon[2][2][1][1]=3324; // Theta*0 |
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362 | BaryonWeight[2][2][1][1]=(1.-pspin_barion); |
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363 | |
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364 | //--------------------------------------- |
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365 | Baryon[2][2][2][0]=3334; // Omega |
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366 | BaryonWeight[2][2][2][0]=1.; |
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367 | |
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368 | //--------------------------------------- |
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369 | /* |
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370 | for(G4int i=0; i<3; i++) |
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371 | { for(G4int j=0; j<3; j++) |
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372 | { for(G4int k=0; k<3; k++) |
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373 | { for(G4int l=0; l<4; l++) |
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374 | { G4cout<<i<<" "<<j<<" "<<k<<" "<<l<<" "<<Baryon[i][j][k][l]<<G4endl;} |
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375 | } |
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376 | } |
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377 | } |
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378 | G4int Uzhi; |
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379 | G4cin>>Uzhi; |
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380 | */ |
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381 | //StrangeSuppress=0.38; |
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382 | Prob_QQbar[0]=StrangeSuppress; // Probability of ddbar production |
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383 | Prob_QQbar[1]=StrangeSuppress; // Probability of uubar production |
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384 | Prob_QQbar[2]=StrangeSuppress/(2.+StrangeSuppress);//(1.-2.*StrangeSuppress); // Probability of ssbar production |
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385 | } |
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386 | |
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387 | // -------------------------------------------------------------- |
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388 | G4LundStringFragmentation::G4LundStringFragmentation(const G4LundStringFragmentation &) : G4VLongitudinalStringDecay() |
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389 | { |
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390 | } |
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391 | |
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392 | G4LundStringFragmentation::~G4LundStringFragmentation() |
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393 | { |
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394 | } |
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395 | |
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396 | //************************************************************************************* |
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397 | |
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398 | const G4LundStringFragmentation & G4LundStringFragmentation::operator=(const G4LundStringFragmentation &) |
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399 | { |
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400 | throw G4HadronicException(__FILE__, __LINE__, "G4LundStringFragmentation::operator= meant to not be accessable"); |
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401 | return *this; |
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402 | } |
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403 | |
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404 | int G4LundStringFragmentation::operator==(const G4LundStringFragmentation &right) const |
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405 | { |
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406 | return !memcmp(this, &right, sizeof(G4LundStringFragmentation)); |
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407 | } |
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408 | |
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409 | int G4LundStringFragmentation::operator!=(const G4LundStringFragmentation &right) const |
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410 | { |
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411 | return memcmp(this, &right, sizeof(G4LundStringFragmentation)); |
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412 | } |
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413 | |
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414 | //-------------------------------------------------------------------------------------- |
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415 | void G4LundStringFragmentation::SetMinimalStringMass(const G4FragmentingString * const string) |
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416 | { |
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417 | G4double EstimatedMass=0.; |
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418 | G4int Number_of_quarks=0; |
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419 | |
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420 | G4int Qleft =std::abs(string->GetLeftParton()->GetPDGEncoding()); |
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421 | |
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422 | if( Qleft > 1000) |
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423 | { |
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424 | Number_of_quarks+=2; |
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425 | G4int q1=Qleft/1000; |
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426 | if( q1 < 3) {EstimatedMass +=Mass_of_light_quark;} |
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427 | if( q1 > 2) {EstimatedMass +=Mass_of_heavy_quark;} |
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428 | |
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429 | G4int q2=(Qleft/100)%10; |
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430 | if( q2 < 3) {EstimatedMass +=Mass_of_light_quark;} |
---|
431 | if( q2 > 2) {EstimatedMass +=Mass_of_heavy_quark;} |
---|
432 | EstimatedMass +=Mass_of_string_junction; |
---|
433 | } |
---|
434 | else |
---|
435 | { |
---|
436 | Number_of_quarks++; |
---|
437 | if( Qleft < 3) {EstimatedMass +=Mass_of_light_quark;} |
---|
438 | if( Qleft > 2) {EstimatedMass +=Mass_of_heavy_quark;} |
---|
439 | } |
---|
440 | |
---|
441 | G4int Qright=std::abs(string->GetRightParton()->GetPDGEncoding()); |
---|
442 | |
---|
443 | if( Qright > 1000) |
---|
444 | { |
---|
445 | Number_of_quarks+=2; |
---|
446 | G4int q1=Qright/1000; |
---|
447 | if( q1 < 3) {EstimatedMass +=Mass_of_light_quark;} |
---|
448 | if( q1 > 2) {EstimatedMass +=Mass_of_heavy_quark;} |
---|
449 | |
---|
450 | G4int q2=(Qright/100)%10; |
---|
451 | if( q2 < 3) {EstimatedMass +=Mass_of_light_quark;} |
---|
452 | if( q2 > 2) {EstimatedMass +=Mass_of_heavy_quark;} |
---|
453 | EstimatedMass +=Mass_of_string_junction; |
---|
454 | } |
---|
455 | else |
---|
456 | { |
---|
457 | Number_of_quarks++; |
---|
458 | if( Qright < 3) {EstimatedMass +=Mass_of_light_quark;} |
---|
459 | if( Qright > 2) {EstimatedMass +=Mass_of_heavy_quark;} |
---|
460 | } |
---|
461 | |
---|
462 | if(Number_of_quarks==2){EstimatedMass +=100.*MeV;} |
---|
463 | if(Number_of_quarks==3){EstimatedMass += 20.*MeV;} |
---|
464 | if(Number_of_quarks==4){EstimatedMass -=2.*Mass_of_string_junction; |
---|
465 | if(EstimatedMass <= 1600.*MeV){EstimatedMass-=200.*MeV;} |
---|
466 | else {EstimatedMass+=100.*MeV;} |
---|
467 | } |
---|
468 | MinimalStringMass=EstimatedMass; |
---|
469 | SetMinimalStringMass2(EstimatedMass); |
---|
470 | } |
---|
471 | |
---|
472 | //-------------------------------------------------------------------------------------- |
---|
473 | void G4LundStringFragmentation::SetMinimalStringMass2( |
---|
474 | const G4double aValue) |
---|
475 | { |
---|
476 | MinimalStringMass2=aValue * aValue; |
---|
477 | } |
---|
478 | |
---|
479 | //-------------------------------------------------------------------------------------- |
---|
480 | G4KineticTrackVector* G4LundStringFragmentation::FragmentString( |
---|
481 | const G4ExcitedString& theString) |
---|
482 | { |
---|
483 | // Can no longer modify Parameters for Fragmentation. |
---|
484 | PastInitPhase=true; |
---|
485 | //SetVectorMesonProbability(1.); |
---|
486 | //SetSpinThreeHalfBarionProbability(1.); |
---|
487 | |
---|
488 | // check if string has enough mass to fragment... |
---|
489 | |
---|
490 | SetMassCut(160.*MeV); // For LightFragmentationTest it is required |
---|
491 | // that no one pi-meson can be produced |
---|
492 | // |
---|
493 | //G4cout<<G4endl<<"G4LundStringFragmentation::"<<G4endl; |
---|
494 | //G4cout<<"FragmentString Position"<<theString.GetPosition()/fermi<<" "<<theString.GetTimeOfCreation()/fermi<<G4endl; |
---|
495 | //G4cout<<"FragmentString Momentum"<<theString.Get4Momentum()<<theString.Get4Momentum().mag()<<G4endl; |
---|
496 | // |
---|
497 | G4FragmentingString aString(theString); |
---|
498 | SetMinimalStringMass(&aString); |
---|
499 | |
---|
500 | /* |
---|
501 | G4cout<<"St Frag "<<MinimalStringMass<<" "<<WminLUND<<" "<<(1.-SmoothParam)<<" "<< theString.Get4Momentum().mag()<<G4endl; |
---|
502 | G4cout<<(MinimalStringMass+WminLUND)*(1.-SmoothParam)<<" "<<theString.Get4Momentum().mag()<<G4endl; |
---|
503 | |
---|
504 | if((MinimalStringMass+WminLUND)*(1.-SmoothParam) > theString.Get4Momentum().mag()) |
---|
505 | {SetMassCut(1000.*MeV);} |
---|
506 | else {SetMassCut(160.*MeV);} |
---|
507 | */ |
---|
508 | // V.U. 20.06.10 in order to put in correspondence LightFragTest and MinStrMass |
---|
509 | |
---|
510 | G4KineticTrackVector * LeftVector(0); |
---|
511 | // G4KineticTrackVector * LeftVector=LightFragmentationTest(&theString); |
---|
512 | //G4cout<<"Min Str Mass "<<MinimalStringMass<<G4endl; |
---|
513 | if(!IsFragmentable(&aString)) // produce 1 hadron |
---|
514 | { |
---|
515 | //G4cout<<"Non fragmentable"<<G4endl; |
---|
516 | SetMassCut(1000.*MeV); |
---|
517 | LeftVector=LightFragmentationTest(&theString); |
---|
518 | SetMassCut(160.*MeV); |
---|
519 | |
---|
520 | |
---|
521 | //G4cout<<"Prod hadron "<<LeftVector->operator[](0)->GetDefinition()->GetParticleName()<<G4endl; |
---|
522 | /* |
---|
523 | if(LeftVector->size() == 1) |
---|
524 | { |
---|
525 | if(! (std::abs(LeftVector->operator[](0)->GetDefinition()->GetPDGMass()- |
---|
526 | theString.Get4Momentum().mag()) < 100*MeV)) |
---|
527 | { // produce a particle with arbitrary isospin |
---|
528 | G4cout<<" produce a particle with arbitrary isospin"<<G4endl; |
---|
529 | |
---|
530 | pDefPair hadrons((G4ParticleDefinition *)0,(G4ParticleDefinition *)0); |
---|
531 | Pcreate build=&G4HadronBuilder::Build; |
---|
532 | FragmentationMass(&aString,build,&hadrons); // 0->1 |
---|
533 | G4cout<<"Hadron PDG "<<hadrons.first->GetPDGEncoding()<<G4endl; |
---|
534 | if ( hadrons.second ==0 ) |
---|
535 | {// Substitute string by light hadron, Note that Energy is not conserved here! |
---|
536 | // Cleaning up the previously produced hadrons ------------------------------ |
---|
537 | std::for_each(LeftVector->begin() , LeftVector->end() , DeleteKineticTrack()); |
---|
538 | LeftVector->clear(); |
---|
539 | |
---|
540 | G4ThreeVector Mom3 = aString.Get4Momentum().vect(); |
---|
541 | G4LorentzVector Mom(Mom3,std::sqrt(Mom3.mag2() + sqr(hadrons.first->GetPDGMass()))); |
---|
542 | LeftVector->push_back(new G4KineticTrack(hadrons.first, 0, |
---|
543 | theString.GetPosition(), |
---|
544 | Mom)); |
---|
545 | } // end of if ( hadrons.second ==0 ) |
---|
546 | } // end of produce a particle with arbitrary isospin |
---|
547 | |
---|
548 | } // end of if(LeftVector->size() == 1) |
---|
549 | */ |
---|
550 | } // end of if(!IsFragmentable(&aString)) |
---|
551 | |
---|
552 | if ( LeftVector != 0 ) { |
---|
553 | // Uzhi insert 6.05.08 start |
---|
554 | if(LeftVector->size() == 1){ |
---|
555 | // One hadron is saved in the interaction |
---|
556 | LeftVector->operator[](0)->SetFormationTime(theString.GetTimeOfCreation()); |
---|
557 | LeftVector->operator[](0)->SetPosition(theString.GetPosition()); |
---|
558 | |
---|
559 | /* // To set large formation time open * |
---|
560 | LeftVector->operator[](0)->SetFormationTime(theString.GetTimeOfCreation()+100.*fermi); |
---|
561 | LeftVector->operator[](0)->SetPosition(theString.GetPosition()); |
---|
562 | G4ThreeVector aPosition(theString.GetPosition().x(), |
---|
563 | theString.GetPosition().y(), |
---|
564 | theString.GetPosition().z()+100.*fermi); |
---|
565 | LeftVector->operator[](0)->SetPosition(aPosition); |
---|
566 | */ |
---|
567 | } else { // 2 hadrons created from qq-qqbar are stored |
---|
568 | |
---|
569 | LeftVector->operator[](0)->SetFormationTime(theString.GetTimeOfCreation()); |
---|
570 | LeftVector->operator[](0)->SetPosition(theString.GetPosition()); |
---|
571 | LeftVector->operator[](1)->SetFormationTime(theString.GetTimeOfCreation()); |
---|
572 | LeftVector->operator[](1)->SetPosition(theString.GetPosition()); |
---|
573 | } |
---|
574 | return LeftVector; |
---|
575 | } |
---|
576 | |
---|
577 | //--------------------- The string can fragment ------------------------------- |
---|
578 | //--------------- At least two particles can be produced ---------------------- |
---|
579 | //G4cout<<"Fragmentable"<<G4endl; |
---|
580 | LeftVector =new G4KineticTrackVector; |
---|
581 | G4KineticTrackVector * RightVector=new G4KineticTrackVector; |
---|
582 | |
---|
583 | G4ExcitedString *theStringInCMS=CPExcited(theString); |
---|
584 | G4LorentzRotation toCms=theStringInCMS->TransformToAlignedCms(); |
---|
585 | |
---|
586 | G4bool success=false, inner_sucess=true; |
---|
587 | G4int attempt=0; |
---|
588 | while ( !success && attempt++ < StringLoopInterrupt ) |
---|
589 | { // If the string fragmentation do not be happend, repeat the fragmentation--- |
---|
590 | G4FragmentingString *currentString=new G4FragmentingString(*theStringInCMS); |
---|
591 | //G4cout<<"Main loop start whilecounter "<<attempt<<G4endl; |
---|
592 | // Cleaning up the previously produced hadrons ------------------------------ |
---|
593 | std::for_each(LeftVector->begin() , LeftVector->end() , DeleteKineticTrack()); |
---|
594 | LeftVector->clear(); |
---|
595 | |
---|
596 | std::for_each(RightVector->begin(), RightVector->end(), DeleteKineticTrack()); |
---|
597 | RightVector->clear(); |
---|
598 | |
---|
599 | // Main fragmentation loop until the string will not be able to fragment ---- |
---|
600 | inner_sucess=true; // set false on failure.. |
---|
601 | |
---|
602 | while (! StopFragmenting(currentString) ) |
---|
603 | { // Split current string into hadron + new string |
---|
604 | |
---|
605 | G4FragmentingString *newString=0; // used as output from SplitUp... |
---|
606 | |
---|
607 | G4KineticTrack * Hadron=Splitup(currentString,newString); |
---|
608 | //G4cout<<"SplitUp------"<<Hadron<<G4endl; |
---|
609 | |
---|
610 | if ( Hadron != 0 ) // Store the hadron |
---|
611 | { |
---|
612 | //G4cout<<"Hadron prod at fragm. "<<Hadron->GetDefinition()->GetParticleName()<<G4endl; |
---|
613 | if ( currentString->GetDecayDirection() > 0 ) |
---|
614 | LeftVector->push_back(Hadron); |
---|
615 | else |
---|
616 | RightVector->push_back(Hadron); |
---|
617 | delete currentString; |
---|
618 | currentString=newString; |
---|
619 | } |
---|
620 | }; |
---|
621 | // Split remaining string into 2 final Hadrons ------------------------ |
---|
622 | //G4cout<<"Split Last"<<G4endl; |
---|
623 | if ( inner_sucess && |
---|
624 | SplitLast(currentString,LeftVector, RightVector) ) |
---|
625 | { |
---|
626 | success=true; |
---|
627 | } |
---|
628 | delete currentString; |
---|
629 | } // End of the loop in attemps to fragment the string |
---|
630 | |
---|
631 | delete theStringInCMS; |
---|
632 | |
---|
633 | if ( ! success ) |
---|
634 | { |
---|
635 | std::for_each(LeftVector->begin(), LeftVector->end(), DeleteKineticTrack()); |
---|
636 | LeftVector->clear(); |
---|
637 | std::for_each(RightVector->begin(), RightVector->end(), DeleteKineticTrack()); |
---|
638 | delete RightVector; |
---|
639 | return LeftVector; |
---|
640 | } |
---|
641 | |
---|
642 | // Join Left- and RightVector into LeftVector in correct order. |
---|
643 | while(!RightVector->empty()) |
---|
644 | { |
---|
645 | LeftVector->push_back(RightVector->back()); |
---|
646 | RightVector->erase(RightVector->end()-1); |
---|
647 | } |
---|
648 | delete RightVector; |
---|
649 | |
---|
650 | CalculateHadronTimePosition(theString.Get4Momentum().mag(), LeftVector); |
---|
651 | |
---|
652 | G4LorentzRotation toObserverFrame(toCms.inverse()); |
---|
653 | |
---|
654 | // LeftVector->operator[](0)->SetFormationTime(theString.GetTimeOfCreation()); |
---|
655 | // LeftVector->operator[](0)->SetPosition(theString.GetPosition()); |
---|
656 | |
---|
657 | G4double TimeOftheStringCreation=theString.GetTimeOfCreation(); |
---|
658 | G4ThreeVector PositionOftheStringCreation(theString.GetPosition()); |
---|
659 | |
---|
660 | //G4cout<<"# prod hadrons "<<LeftVector->size()<<G4endl; |
---|
661 | for(size_t C1 = 0; C1 < LeftVector->size(); C1++) |
---|
662 | { |
---|
663 | G4KineticTrack* Hadron = LeftVector->operator[](C1); |
---|
664 | G4LorentzVector Momentum = Hadron->Get4Momentum(); |
---|
665 | //G4cout<<"Hadron "<<Hadron->GetDefinition()->GetParticleName()<<" "<<Momentum<<G4endl; |
---|
666 | Momentum = toObserverFrame*Momentum; |
---|
667 | Hadron->Set4Momentum(Momentum); |
---|
668 | |
---|
669 | G4LorentzVector Coordinate(Hadron->GetPosition(), Hadron->GetFormationTime()); |
---|
670 | Momentum = toObserverFrame*Coordinate; |
---|
671 | Hadron->SetFormationTime(TimeOftheStringCreation+Momentum.e() |
---|
672 | -fermi/c_light); |
---|
673 | G4ThreeVector aPosition(Momentum.vect()); |
---|
674 | // Hadron->SetPosition(theString.GetPosition()+aPosition); |
---|
675 | Hadron->SetPosition(PositionOftheStringCreation+aPosition); |
---|
676 | }; |
---|
677 | |
---|
678 | return LeftVector; |
---|
679 | |
---|
680 | } |
---|
681 | |
---|
682 | //---------------------------------------------------------------------------------- |
---|
683 | G4bool G4LundStringFragmentation::IsFragmentable(const G4FragmentingString * const string) |
---|
684 | { |
---|
685 | SetMinimalStringMass(string); |
---|
686 | // return sqr(MinimalStringMass + WminLUND) < string->Get4Momentum().mag2(); |
---|
687 | return MinimalStringMass < string->Get4Momentum().mag(); // 21.07.2010 |
---|
688 | } |
---|
689 | |
---|
690 | //---------------------------------------------------------------------------------------- |
---|
691 | G4bool G4LundStringFragmentation::StopFragmenting(const G4FragmentingString * const string) |
---|
692 | { |
---|
693 | SetMinimalStringMass(string); |
---|
694 | |
---|
695 | /* |
---|
696 | G4cout<<"StopFragm MinMass "<<MinimalStringMass<<" String Mass "<<string->Get4Momentum().mag()<<G4endl; |
---|
697 | G4cout<<"WminLUND "<<WminLUND<<" SmoothParam "<<SmoothParam<<" "<<string->Mass()<<G4endl; |
---|
698 | //G4cout<<std::exp(-(string->Mass()*string->Mass()-MinimalStringMass2)/WminLUND/WminLUND)<<G4endl; |
---|
699 | //G4int Uzhi; G4cin>>Uzhi; |
---|
700 | */ |
---|
701 | // |
---|
702 | return (MinimalStringMass + WminLUND)* |
---|
703 | (1 + SmoothParam * (1.-2*G4UniformRand())) > |
---|
704 | string->Mass(); |
---|
705 | // |
---|
706 | // return G4UniformRand() < std::exp(-(string->Mass()*string->Mass()-MinimalStringMass2)/WminLUND/WminLUND); |
---|
707 | } |
---|
708 | |
---|
709 | //---------------------------------------------------------------------------------------- |
---|
710 | G4bool G4LundStringFragmentation::SplitLast(G4FragmentingString * string, |
---|
711 | G4KineticTrackVector * LeftVector, |
---|
712 | G4KineticTrackVector * RightVector) |
---|
713 | { |
---|
714 | //... perform last cluster decay |
---|
715 | //G4cout<<"Split last-----------------------------------------"<<G4endl; |
---|
716 | G4LorentzVector Str4Mom=string->Get4Momentum(); |
---|
717 | |
---|
718 | G4ThreeVector ClusterVel =string->Get4Momentum().boostVector(); |
---|
719 | |
---|
720 | G4double StringMass = string->Mass(); |
---|
721 | G4double StringMassSqr= sqr(StringMass); |
---|
722 | |
---|
723 | G4ParticleDefinition * LeftHadron(0), * RightHadron(0); |
---|
724 | G4double LeftHadronMass(0.), RightHadronMass(0.); |
---|
725 | |
---|
726 | G4ParticleDefinition * FS_LeftHadron[25], * FS_RightHadron[25]; |
---|
727 | G4double FS_Weight[25]; |
---|
728 | G4int NumberOf_FS=0; |
---|
729 | |
---|
730 | for(G4int i=0; i<25; i++) {FS_Weight[i]=0.;} |
---|
731 | //*********************************************** |
---|
732 | //G4cout<<"StrMass "<<StringMass<<" q "<<string->GetLeftParton()->GetParticleName()<<" "<<string->GetRightParton()->GetParticleName()<<" StringMassSqr "<<StringMassSqr<<G4endl; |
---|
733 | |
---|
734 | |
---|
735 | string->SetLeftPartonStable(); // to query quark contents.. |
---|
736 | |
---|
737 | if (string->FourQuarkString() ) |
---|
738 | { |
---|
739 | // The string is qq-qqbar type. Diquarks are on the string ends |
---|
740 | G4int cClusterInterrupt = 0; |
---|
741 | do |
---|
742 | { |
---|
743 | //G4cout<<"cClusterInterrupt "<<cClusterInterrupt<<G4endl; |
---|
744 | if (cClusterInterrupt++ >= ClusterLoopInterrupt) |
---|
745 | { |
---|
746 | return false; |
---|
747 | } |
---|
748 | |
---|
749 | G4int LeftQuark1= string->GetLeftParton()->GetPDGEncoding()/1000; |
---|
750 | G4int LeftQuark2=(string->GetLeftParton()->GetPDGEncoding()/100)%10; |
---|
751 | |
---|
752 | G4int RightQuark1= string->GetRightParton()->GetPDGEncoding()/1000; |
---|
753 | G4int RightQuark2=(string->GetRightParton()->GetPDGEncoding()/100)%10; |
---|
754 | |
---|
755 | if(G4UniformRand()<0.5) |
---|
756 | { |
---|
757 | LeftHadron =hadronizer->Build(FindParticle( LeftQuark1), |
---|
758 | FindParticle(RightQuark1)); |
---|
759 | RightHadron=hadronizer->Build(FindParticle( LeftQuark2), |
---|
760 | FindParticle(RightQuark2)); |
---|
761 | } else |
---|
762 | { |
---|
763 | LeftHadron =hadronizer->Build(FindParticle( LeftQuark1), |
---|
764 | FindParticle(RightQuark2)); |
---|
765 | RightHadron=hadronizer->Build(FindParticle( LeftQuark2), |
---|
766 | FindParticle(RightQuark1)); |
---|
767 | } |
---|
768 | |
---|
769 | //... repeat procedure, if mass of cluster is too low to produce hadrons |
---|
770 | //... ClusterMassCut = 0.15*GeV model parameter |
---|
771 | } |
---|
772 | while ((StringMass <= LeftHadron->GetPDGMass() + RightHadron->GetPDGMass())); |
---|
773 | |
---|
774 | } // End of if (string->FourQuarkString() ) |
---|
775 | |
---|
776 | //*********************************************** |
---|
777 | |
---|
778 | if (!string->FourQuarkString()) |
---|
779 | { |
---|
780 | if (string->DecayIsQuark() && string->StableIsQuark() ) |
---|
781 | {//... there are quarks on cluster ends |
---|
782 | //G4cout<<"Q Q string"<<G4endl; |
---|
783 | G4ParticleDefinition * Quark; |
---|
784 | G4ParticleDefinition * Anti_Quark; |
---|
785 | |
---|
786 | if(string->GetLeftParton()->GetPDGEncoding()>0) |
---|
787 | { |
---|
788 | Quark =string->GetLeftParton(); |
---|
789 | Anti_Quark=string->GetRightParton(); |
---|
790 | } else |
---|
791 | { |
---|
792 | Quark =string->GetRightParton(); |
---|
793 | Anti_Quark=string->GetLeftParton(); |
---|
794 | } |
---|
795 | |
---|
796 | G4int IDquark =Quark->GetPDGEncoding(); |
---|
797 | G4int AbsIDquark =std::abs(IDquark); |
---|
798 | G4int IDanti_quark =Anti_Quark->GetPDGEncoding(); |
---|
799 | G4int AbsIDanti_quark=std::abs(IDanti_quark); |
---|
800 | |
---|
801 | NumberOf_FS=0; |
---|
802 | for(G4int ProdQ=1; ProdQ < 4; ProdQ++) |
---|
803 | { |
---|
804 | G4int SignQ=-1; |
---|
805 | if(IDquark == 2) SignQ= 1; |
---|
806 | if((IDquark == 1) && (ProdQ == 3)) SignQ= 1; // K0 |
---|
807 | if((IDquark == 3) && (ProdQ == 1)) SignQ=-1; // K0bar |
---|
808 | if(IDquark == ProdQ) SignQ= 1; |
---|
809 | |
---|
810 | G4int SignAQ= 1; |
---|
811 | if(IDanti_quark == -2) SignAQ=-1; |
---|
812 | if((IDanti_quark ==-1) && (ProdQ == 3)) SignAQ=-1; // K0bar |
---|
813 | if((IDanti_quark ==-3) && (ProdQ == 1)) SignAQ= 1; // K0 |
---|
814 | if(AbsIDanti_quark == ProdQ) SignAQ= 1; |
---|
815 | |
---|
816 | G4int StateQ=0; |
---|
817 | do // while(Meson[AbsIDquark-1][ProdQ-1][StateQ]<>0); |
---|
818 | { |
---|
819 | LeftHadron=G4ParticleTable::GetParticleTable()->FindParticle(SignQ* |
---|
820 | Meson[AbsIDquark-1][ProdQ-1][StateQ]); |
---|
821 | LeftHadronMass=LeftHadron->GetPDGMass(); |
---|
822 | StateQ++; |
---|
823 | |
---|
824 | G4int StateAQ=0; |
---|
825 | do // while(Meson[AbsIDanti_quark-1][ProdQ-1][StateAQ]<>0); |
---|
826 | { |
---|
827 | RightHadron=G4ParticleTable::GetParticleTable()->FindParticle(SignAQ* |
---|
828 | Meson[AbsIDanti_quark-1][ProdQ-1][StateAQ]); |
---|
829 | RightHadronMass=RightHadron->GetPDGMass(); |
---|
830 | StateAQ++; |
---|
831 | |
---|
832 | if(StringMass >= LeftHadronMass + RightHadronMass) |
---|
833 | { |
---|
834 | G4double FS_Psqr=lambda(StringMassSqr,sqr(LeftHadronMass), |
---|
835 | sqr(RightHadronMass)); |
---|
836 | FS_Weight[NumberOf_FS]=std::sqrt(FS_Psqr)* |
---|
837 | MesonWeight[AbsIDquark-1][ProdQ-1][StateQ]* |
---|
838 | MesonWeight[AbsIDanti_quark-1][ProdQ-1][StateAQ]* |
---|
839 | Prob_QQbar[ProdQ-1]; |
---|
840 | |
---|
841 | FS_LeftHadron[NumberOf_FS] = LeftHadron; |
---|
842 | FS_RightHadron[NumberOf_FS]= RightHadron; |
---|
843 | NumberOf_FS++; |
---|
844 | if(NumberOf_FS > 24) |
---|
845 | {G4int Uzhi; G4cout<<"QQbar string #_FS "<<NumberOf_FS<<G4endl; G4cin>>Uzhi;} |
---|
846 | } // End of if(StringMass >= LeftHadronMass + RightHadronMass) |
---|
847 | } while(Meson[AbsIDanti_quark-1][ProdQ-1][StateAQ]!=0); |
---|
848 | } while(Meson[AbsIDquark-1][ProdQ-1][StateQ]!=0); |
---|
849 | } // End of for(G4int ProdQ=1; ProdQ < 4; ProdQ++) |
---|
850 | // |
---|
851 | } else //--------------------------------------------- |
---|
852 | { //... there is a Diquark on one of the cluster ends |
---|
853 | //G4cout<<"DiQ Q string"<<G4endl; |
---|
854 | G4ParticleDefinition * Di_Quark; |
---|
855 | G4ParticleDefinition * Quark; |
---|
856 | |
---|
857 | if(string->GetLeftParton()->GetParticleSubType()== "quark") |
---|
858 | { |
---|
859 | Quark =string->GetLeftParton(); |
---|
860 | Di_Quark=string->GetRightParton(); |
---|
861 | } else |
---|
862 | { |
---|
863 | Quark =string->GetRightParton(); |
---|
864 | Di_Quark=string->GetLeftParton(); |
---|
865 | } |
---|
866 | |
---|
867 | G4int IDquark =Quark->GetPDGEncoding(); |
---|
868 | G4int AbsIDquark =std::abs(IDquark); |
---|
869 | G4int IDdi_quark =Di_Quark->GetPDGEncoding(); |
---|
870 | G4int AbsIDdi_quark=std::abs(IDdi_quark); |
---|
871 | G4int Di_q1=AbsIDdi_quark/1000; |
---|
872 | G4int Di_q2=(AbsIDdi_quark-Di_q1*1000)/100; |
---|
873 | //G4cout<<"IDs "<<IDdi_quark<<" "<<IDquark<<G4endl; |
---|
874 | |
---|
875 | G4int SignDiQ= 1; |
---|
876 | if(IDdi_quark < 0) SignDiQ=-1; |
---|
877 | |
---|
878 | NumberOf_FS=0; |
---|
879 | for(G4int ProdQ=1; ProdQ < 4; ProdQ++) |
---|
880 | { |
---|
881 | G4int SignQ; |
---|
882 | if(IDquark > 0) |
---|
883 | { SignQ=-1; |
---|
884 | if(IDquark == 2) SignQ= 1; |
---|
885 | if((IDquark == 1) && (ProdQ == 3)) SignQ= 1; // K0 |
---|
886 | if((IDquark == 3) && (ProdQ == 1)) SignQ=-1; // K0bar |
---|
887 | } else |
---|
888 | { |
---|
889 | SignQ= 1; |
---|
890 | if(IDquark == -2) SignQ=-1; |
---|
891 | if((IDquark ==-1) && (ProdQ == 3)) SignQ=-1; // K0bar |
---|
892 | if((IDquark ==-3) && (ProdQ == 1)) SignQ= 1; // K0 |
---|
893 | } |
---|
894 | |
---|
895 | if(AbsIDquark == ProdQ) SignQ= 1; |
---|
896 | |
---|
897 | //G4cout<<G4endl; |
---|
898 | //G4cout<<"-------------------------------------------"<<G4endl; |
---|
899 | //G4cout<<"Insert QQbar "<<ProdQ<<" Sign "<<SignQ<<G4endl; |
---|
900 | |
---|
901 | G4int StateQ=0; |
---|
902 | do // while(Meson[AbsIDquark-1][ProdQ-1][StateQ]<>0); |
---|
903 | { |
---|
904 | //G4cout<<G4endl<<"AbsIDquark ProdQ StateQ "<<MesonWeight[AbsIDquark-1][ProdQ-1][StateQ]<<" "<<AbsIDquark<<" "<<ProdQ<<" "<<StateQ<<G4endl; |
---|
905 | //G4cout<<G4endl<<"AbsIDquark ProdQ StateQ "<<SignQ*Meson[AbsIDquark-1][ProdQ-1][StateQ]<<" "<<AbsIDquark<<" "<<ProdQ<<" "<<StateQ<<G4endl; |
---|
906 | LeftHadron=G4ParticleTable::GetParticleTable()->FindParticle(SignQ* |
---|
907 | Meson[AbsIDquark-1][ProdQ-1][StateQ]); |
---|
908 | LeftHadronMass=LeftHadron->GetPDGMass(); |
---|
909 | |
---|
910 | //G4cout<<"Meson "<<LeftHadron->GetParticleName()<<G4endl; |
---|
911 | |
---|
912 | G4int StateDiQ=0; |
---|
913 | do // while(Baryon[Di_q1-1][Di_q2-1][ProdQ-1][StateDiQ]<>0); |
---|
914 | { |
---|
915 | //G4cout<<G4endl<<"Di_q1 Di_q2 ProdQ StateDiQ "<<BaryonWeight[Di_q1-1][Di_q2-1][ProdQ-1][StateDiQ]<<" "<<Di_q1-1<<" "<<Di_q2-1<<" "<<ProdQ-1<<" "<<StateDiQ<<G4endl; |
---|
916 | RightHadron=G4ParticleTable::GetParticleTable()->FindParticle(SignDiQ* |
---|
917 | Baryon[Di_q1-1][Di_q2-1][ProdQ-1][StateDiQ]); |
---|
918 | RightHadronMass=RightHadron->GetPDGMass(); |
---|
919 | |
---|
920 | //G4cout<<"Baryon "<<RightHadron->GetParticleName()<<G4endl; |
---|
921 | |
---|
922 | //G4cout<<"StringMass LeftHadronMass RightHadronMass "<<StringMass<<" "<<LeftHadronMass<<" "<< RightHadronMass<<G4endl; |
---|
923 | |
---|
924 | if(StringMass >= LeftHadronMass + RightHadronMass) |
---|
925 | { |
---|
926 | G4double FS_Psqr=lambda(StringMassSqr,sqr(LeftHadronMass), |
---|
927 | sqr(RightHadronMass)); |
---|
928 | FS_Weight[NumberOf_FS]=std::sqrt(FS_Psqr)* |
---|
929 | MesonWeight[AbsIDquark-1][ProdQ-1][StateQ]* |
---|
930 | BaryonWeight[Di_q1-1][Di_q2-1][ProdQ-1][StateDiQ]* |
---|
931 | Prob_QQbar[ProdQ-1]; |
---|
932 | |
---|
933 | FS_LeftHadron[NumberOf_FS] = LeftHadron; |
---|
934 | FS_RightHadron[NumberOf_FS]= RightHadron; |
---|
935 | |
---|
936 | //G4cout<<"State "<<NumberOf_FS<<" "<<std::sqrt(FS_Psqr/4./StringMassSqr)<<" "<<std::sqrt(FS_Psqr)<<" "<<FS_Weight[NumberOf_FS]<<G4endl; |
---|
937 | //G4cout<<"++++++++++++++++++++++++++++++++"<<G4endl; |
---|
938 | NumberOf_FS++; |
---|
939 | |
---|
940 | if(NumberOf_FS > 24) |
---|
941 | {G4int Uzhi; G4cout<<"QQbar string #_FS "<<NumberOf_FS<<G4endl; G4cin>>Uzhi;} |
---|
942 | } // End of if(StringMass >= LeftHadronMass + RightHadronMass) |
---|
943 | |
---|
944 | StateDiQ++; |
---|
945 | //G4cout<<Baryon[Di_q1-1][Di_q2-1][ProdQ-1][StateDiQ]<<" "<<Di_q1-1<<" "<<Di_q2-1<<" "<<ProdQ-1<<" "<<StateDiQ<<G4endl; |
---|
946 | } while(Baryon[Di_q1-1][Di_q2-1][ProdQ-1][StateDiQ]!=0); |
---|
947 | |
---|
948 | StateQ++; |
---|
949 | } while(Meson[AbsIDquark-1][ProdQ-1][StateQ]!=0); |
---|
950 | } // End of for(G4int ProdQ=1; ProdQ < 4; ProdQ++) |
---|
951 | } |
---|
952 | //==================================== |
---|
953 | |
---|
954 | if(NumberOf_FS == 0) return false; |
---|
955 | //G4cout<<"NumberOf_FS "<<NumberOf_FS<<G4endl; |
---|
956 | G4double SumWeights=0.; |
---|
957 | for(G4int i=0; i<NumberOf_FS; i++) {SumWeights+=FS_Weight[i];} |
---|
958 | |
---|
959 | G4double ksi=G4UniformRand(); |
---|
960 | G4double Sum=0.; |
---|
961 | G4int SampledState(0); |
---|
962 | |
---|
963 | for(G4int i=0; i<NumberOf_FS; i++) |
---|
964 | { |
---|
965 | Sum+=(FS_Weight[i]/SumWeights); |
---|
966 | SampledState=i; |
---|
967 | if(Sum >= ksi) break; |
---|
968 | } |
---|
969 | |
---|
970 | LeftHadron =FS_LeftHadron[SampledState]; |
---|
971 | RightHadron=FS_RightHadron[SampledState]; |
---|
972 | |
---|
973 | //G4cout<<"Selected "<<SampledState<<" "<<LeftHadron->GetParticleName()<<" "<<RightHadron->GetParticleName()<<G4endl; |
---|
974 | |
---|
975 | } // End of if(!string->FourQuarkString()) |
---|
976 | |
---|
977 | G4LorentzVector LeftMom, RightMom; |
---|
978 | G4ThreeVector Pos; |
---|
979 | |
---|
980 | Sample4Momentum(&LeftMom, LeftHadron->GetPDGMass(), |
---|
981 | &RightMom, RightHadron->GetPDGMass(), |
---|
982 | StringMass); |
---|
983 | |
---|
984 | LeftMom.boost(ClusterVel); |
---|
985 | RightMom.boost(ClusterVel); |
---|
986 | |
---|
987 | LeftVector->push_back(new G4KineticTrack(LeftHadron, 0, Pos, LeftMom)); |
---|
988 | RightVector->push_back(new G4KineticTrack(RightHadron, 0, Pos, RightMom)); |
---|
989 | |
---|
990 | return true; |
---|
991 | |
---|
992 | } |
---|
993 | |
---|
994 | //---------------------------------------------------------------------------------------------------------- |
---|
995 | |
---|
996 | void G4LundStringFragmentation::Sample4Momentum(G4LorentzVector* Mom, G4double Mass, G4LorentzVector* AntiMom, G4double AntiMass, G4double InitialMass) |
---|
997 | { |
---|
998 | // ------ Sampling of momenta of 2 last produced hadrons -------------------- |
---|
999 | G4ThreeVector Pt; |
---|
1000 | G4double MassMt2, AntiMassMt2; |
---|
1001 | G4double AvailablePz, AvailablePz2; |
---|
1002 | |
---|
1003 | //G4cout<<"Masses "<<InitialMass<<" "<<Mass<<" "<<AntiMass<<G4endl; |
---|
1004 | // |
---|
1005 | |
---|
1006 | if((Mass > 930. || AntiMass > 930.)) //If there is a baryon |
---|
1007 | { |
---|
1008 | // ----------------- Isotropic decay ------------------------------------ |
---|
1009 | G4double r_val = sqr(InitialMass*InitialMass - Mass*Mass - AntiMass*AntiMass) - |
---|
1010 | sqr(2.*Mass*AntiMass); |
---|
1011 | G4double Pabs = (r_val > 0.)? std::sqrt(r_val)/(2.*InitialMass) : 0; |
---|
1012 | //G4cout<<"P for isotr decay "<<Pabs<<G4endl; |
---|
1013 | |
---|
1014 | //... sample unit vector |
---|
1015 | G4double pz =1. - 2.*G4UniformRand(); |
---|
1016 | G4double st = std::sqrt(1. - pz * pz)*Pabs; |
---|
1017 | G4double phi = 2.*pi*G4UniformRand(); |
---|
1018 | G4double px = st*std::cos(phi); |
---|
1019 | G4double py = st*std::sin(phi); |
---|
1020 | pz *= Pabs; |
---|
1021 | |
---|
1022 | Mom->setPx(px); Mom->setPy(py); Mom->setPz(pz); |
---|
1023 | Mom->setE(std::sqrt(Pabs*Pabs + Mass*Mass)); |
---|
1024 | |
---|
1025 | AntiMom->setPx(-px); AntiMom->setPy(-py); AntiMom->setPz(-pz); |
---|
1026 | AntiMom->setE (std::sqrt(Pabs*Pabs + AntiMass*AntiMass)); |
---|
1027 | //G4int Uzhi; G4cin>>Uzhi; |
---|
1028 | } |
---|
1029 | else |
---|
1030 | // |
---|
1031 | { |
---|
1032 | do |
---|
1033 | { |
---|
1034 | // GF 22-May-09, limit sampled pt to allowed range |
---|
1035 | |
---|
1036 | G4double termD = InitialMass*InitialMass -Mass*Mass - AntiMass*AntiMass; |
---|
1037 | G4double termab = 4*sqr(Mass*AntiMass); |
---|
1038 | G4double termN = 2*termD + 4*Mass*Mass + 4*AntiMass*AntiMass; |
---|
1039 | G4double pt2max=(termD*termD - termab )/ termN ; |
---|
1040 | //G4cout<<"Anis "<<pt2max<<" "<<(termD*termD-termab)/(4.*InitialMass*InitialMass)<<G4endl; |
---|
1041 | |
---|
1042 | Pt=SampleQuarkPt(std::sqrt(pt2max)); Pt.setZ(0); G4double Pt2=Pt.mag2(); |
---|
1043 | //G4cout<<"Sampl pt2 "<<Pt2<<G4endl; |
---|
1044 | MassMt2 = Mass * Mass + Pt2; |
---|
1045 | AntiMassMt2= AntiMass * AntiMass + Pt2; |
---|
1046 | |
---|
1047 | AvailablePz2= sqr(InitialMass*InitialMass - MassMt2 - AntiMassMt2) - |
---|
1048 | 4.*MassMt2*AntiMassMt2; |
---|
1049 | } |
---|
1050 | while(AvailablePz2 < 0.); // GF will occur only for numerical precision problem with limit in sampled pt |
---|
1051 | |
---|
1052 | AvailablePz2 /=(4.*InitialMass*InitialMass); |
---|
1053 | AvailablePz = std::sqrt(AvailablePz2); |
---|
1054 | |
---|
1055 | G4double Px=Pt.getX(); |
---|
1056 | G4double Py=Pt.getY(); |
---|
1057 | |
---|
1058 | Mom->setPx(Px); Mom->setPy(Py); Mom->setPz(AvailablePz); |
---|
1059 | Mom->setE(std::sqrt(MassMt2+AvailablePz2)); |
---|
1060 | |
---|
1061 | AntiMom->setPx(-Px); AntiMom->setPy(-Py); AntiMom->setPz(-AvailablePz); |
---|
1062 | AntiMom->setE (std::sqrt(AntiMassMt2+AvailablePz2)); |
---|
1063 | } |
---|
1064 | } |
---|
1065 | |
---|
1066 | //----------------------------------------------------------------------------- |
---|
1067 | |
---|
1068 | G4LorentzVector * G4LundStringFragmentation::SplitEandP(G4ParticleDefinition * pHadron, |
---|
1069 | G4FragmentingString * string, G4FragmentingString * newString) |
---|
1070 | { |
---|
1071 | //G4cout<<"Start SplitEandP "<<G4endl; |
---|
1072 | G4LorentzVector String4Momentum=string->Get4Momentum(); |
---|
1073 | G4double StringMT2=string->Get4Momentum().mt2(); |
---|
1074 | |
---|
1075 | G4double HadronMass = pHadron->GetPDGMass(); |
---|
1076 | |
---|
1077 | SetMinimalStringMass(newString); |
---|
1078 | //G4cout<<"HadM MinimalStringMassLeft StringM "<<HadronMass<<" "<<MinimalStringMass<<" "<<String4Momentum.mag()<<G4endl; |
---|
1079 | |
---|
1080 | if(HadronMass + MinimalStringMass > String4Momentum.mag()) {return 0;}// have to start all over! |
---|
1081 | String4Momentum.setPz(0.); |
---|
1082 | G4ThreeVector StringPt=String4Momentum.vect(); |
---|
1083 | |
---|
1084 | // calculate and assign hadron transverse momentum component HadronPx and HadronPy |
---|
1085 | G4ThreeVector thePt; |
---|
1086 | thePt=SampleQuarkPt(); |
---|
1087 | |
---|
1088 | G4ThreeVector HadronPt = thePt +string->DecayPt(); |
---|
1089 | HadronPt.setZ(0); |
---|
1090 | |
---|
1091 | G4ThreeVector RemSysPt = StringPt - HadronPt; |
---|
1092 | |
---|
1093 | //... sample z to define hadron longitudinal momentum and energy |
---|
1094 | //... but first check the available phase space |
---|
1095 | |
---|
1096 | G4double HadronMassT2 = sqr(HadronMass) + HadronPt.mag2(); |
---|
1097 | G4double ResidualMassT2=sqr(MinimalStringMass) + RemSysPt.mag2(); |
---|
1098 | |
---|
1099 | G4double Pz2 = (sqr(StringMT2 - HadronMassT2 - ResidualMassT2) - |
---|
1100 | 4*HadronMassT2 * ResidualMassT2)/4./StringMT2; |
---|
1101 | //G4cout<<"Pz2 "<<Pz2<<G4endl; |
---|
1102 | if(Pz2 < 0 ) {return 0;} // have to start all over! |
---|
1103 | |
---|
1104 | //... then compute allowed z region z_min <= z <= z_max |
---|
1105 | |
---|
1106 | G4double Pz = std::sqrt(Pz2); |
---|
1107 | G4double zMin = (std::sqrt(HadronMassT2+Pz2) - Pz)/std::sqrt(StringMT2); |
---|
1108 | G4double zMax = (std::sqrt(HadronMassT2+Pz2) + Pz)/std::sqrt(StringMT2); |
---|
1109 | |
---|
1110 | //G4cout<<"if (zMin >= zMax) return 0 "<<zMin<<" "<<zMax<<G4endl; |
---|
1111 | if (zMin >= zMax) return 0; // have to start all over! |
---|
1112 | |
---|
1113 | G4double z = GetLightConeZ(zMin, zMax, |
---|
1114 | string->GetDecayParton()->GetPDGEncoding(), pHadron, |
---|
1115 | HadronPt.x(), HadronPt.y()); |
---|
1116 | //G4cout<<"z "<<z<<G4endl; |
---|
1117 | //... now compute hadron longitudinal momentum and energy |
---|
1118 | // longitudinal hadron momentum component HadronPz |
---|
1119 | |
---|
1120 | HadronPt.setZ(0.5* string->GetDecayDirection() * |
---|
1121 | (z * string->LightConeDecay() - |
---|
1122 | HadronMassT2/(z * string->LightConeDecay()))); |
---|
1123 | |
---|
1124 | G4double HadronE = 0.5* (z * string->LightConeDecay() + |
---|
1125 | HadronMassT2/(z * string->LightConeDecay())); |
---|
1126 | |
---|
1127 | G4LorentzVector * a4Momentum= new G4LorentzVector(HadronPt,HadronE); |
---|
1128 | //G4cout<<"Out SplitEandP "<<G4endl; |
---|
1129 | return a4Momentum; |
---|
1130 | } |
---|
1131 | |
---|
1132 | //----------------------------------------------------------------------------------------- |
---|
1133 | G4double G4LundStringFragmentation::GetLightConeZ(G4double zmin, G4double zmax, |
---|
1134 | G4int PDGEncodingOfDecayParton, |
---|
1135 | G4ParticleDefinition* pHadron, |
---|
1136 | G4double Px, G4double Py) |
---|
1137 | { |
---|
1138 | G4double alund; |
---|
1139 | |
---|
1140 | // If blund get restored, you MUST adapt the calculation of zOfMaxyf. |
---|
1141 | // const G4double blund = 1; |
---|
1142 | |
---|
1143 | G4double z, yf; |
---|
1144 | G4double Mass = pHadron->GetPDGMass(); |
---|
1145 | // G4int HadronEncoding=pHadron->GetPDGEncoding(); |
---|
1146 | |
---|
1147 | G4double Mt2 = Px*Px + Py*Py + Mass*Mass; |
---|
1148 | |
---|
1149 | if(std::abs(PDGEncodingOfDecayParton) < 1000) |
---|
1150 | { |
---|
1151 | // ---------------- Quark fragmentation ---------------------- |
---|
1152 | alund=0.35/GeV/GeV; // Instead of 0.7 because kinks are not considered |
---|
1153 | G4double zOfMaxyf=alund*Mt2/(alund*Mt2 + 1.); |
---|
1154 | G4double maxYf=(1-zOfMaxyf)/zOfMaxyf * std::exp(-alund*Mt2/zOfMaxyf); |
---|
1155 | |
---|
1156 | do |
---|
1157 | { |
---|
1158 | z = zmin + G4UniformRand()*(zmax-zmin); |
---|
1159 | // yf = std::pow(1. - z, blund)/z*std::exp(-alund*Mt2/z); |
---|
1160 | yf = (1-z)/z * std::exp(-alund*Mt2/z); |
---|
1161 | } |
---|
1162 | while (G4UniformRand()*maxYf > yf); |
---|
1163 | } |
---|
1164 | else |
---|
1165 | { |
---|
1166 | // ---------------- Di-quark fragmentation ---------------------- |
---|
1167 | alund=0.7/GeV/GeV; // 0.7 2.0 |
---|
1168 | G4double zOfMaxyf=alund*Mt2/(alund*Mt2 + 1.); |
---|
1169 | G4double maxYf=(1-zOfMaxyf)/zOfMaxyf * std::exp(-alund*Mt2/zOfMaxyf); |
---|
1170 | do |
---|
1171 | { |
---|
1172 | z = zmin + G4UniformRand()*(zmax-zmin); |
---|
1173 | // yf = std::pow(1. - z, blund)/z*std::exp(-alund*Mt2/z); |
---|
1174 | yf = (1-z)/z * std::exp(-alund*Mt2/z); |
---|
1175 | } |
---|
1176 | while (G4UniformRand()*maxYf > yf); |
---|
1177 | }; |
---|
1178 | |
---|
1179 | return z; |
---|
1180 | } |
---|
1181 | |
---|
1182 | //------------------------------------------------------------------------ |
---|
1183 | G4double G4LundStringFragmentation::lambda(G4double s, G4double m1_Sqr, G4double m2_Sqr) |
---|
1184 | { |
---|
1185 | G4double lam = sqr(s - m1_Sqr - m2_Sqr) - 4.*m1_Sqr*m2_Sqr; |
---|
1186 | return lam; |
---|
1187 | } |
---|
1188 | |
---|