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: G4FTFModel.cc,v 1.37 2010/11/15 10:02:38 vuzhinsk Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-04-ref-00 $ |
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29 | // |
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30 | |
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31 | // ------------------------------------------------------------ |
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32 | // GEANT 4 class implementation file |
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33 | // |
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34 | // ---------------- G4FTFModel ---------------- |
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35 | // by Gunter Folger, May 1998. |
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36 | // class implementing the excitation in the FTF Parton String Model |
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37 | // ------------------------------------------------------------ |
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38 | |
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39 | #include "G4FTFModel.hh" |
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40 | #include "G4FTFParameters.hh" |
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41 | #include "G4FTFParticipants.hh" |
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42 | #include "G4DiffractiveSplitableHadron.hh" |
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43 | #include "G4InteractionContent.hh" |
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44 | #include "G4LorentzRotation.hh" |
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45 | #include "G4ParticleDefinition.hh" |
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46 | #include "G4ParticleTable.hh" |
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47 | #include "G4ios.hh" |
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48 | #include <utility> |
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49 | #include "G4IonTable.hh" |
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50 | |
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51 | // Class G4FTFModel |
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52 | |
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53 | G4FTFModel::G4FTFModel():theExcitation(new G4DiffractiveExcitation()), |
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54 | theElastic(new G4ElasticHNScattering()) |
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55 | { |
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56 | G4VPartonStringModel::SetThisPointer(this); |
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57 | theParameters=0; |
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58 | NumberOfInvolvedNucleon=0; |
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59 | } |
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60 | |
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61 | |
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62 | G4FTFModel::~G4FTFModel() |
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63 | { |
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64 | // Because FTF model can be called for various particles |
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65 | // theParameters must be erased at the end of each call. |
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66 | // Thus the delete is also in G4FTFModel::GetStrings() method |
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67 | if( theParameters != 0 ) delete theParameters; |
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68 | if( theExcitation != 0 ) delete theExcitation; |
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69 | if( theElastic != 0 ) delete theElastic; |
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70 | |
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71 | if( NumberOfInvolvedNucleon != 0) |
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72 | { |
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73 | for(G4int i=0; i < NumberOfInvolvedNucleon; i++) |
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74 | { |
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75 | G4VSplitableHadron * aNucleon = TheInvolvedNucleon[i]->GetSplitableHadron(); |
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76 | if(aNucleon) delete aNucleon; |
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77 | } |
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78 | } |
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79 | } |
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80 | |
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81 | const G4FTFModel & G4FTFModel::operator=(const G4FTFModel &) |
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82 | { |
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83 | throw G4HadronicException(__FILE__, __LINE__, "G4FTFModel::operator= is not meant to be accessed "); |
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84 | return *this; |
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85 | } |
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86 | |
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87 | int G4FTFModel::operator==(const G4FTFModel &right) const |
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88 | { |
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89 | return this==&right; |
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90 | } |
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91 | |
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92 | int G4FTFModel::operator!=(const G4FTFModel &right) const |
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93 | { |
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94 | return this!=&right; |
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95 | } |
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96 | |
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97 | // ------------------------------------------------------------ |
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98 | void G4FTFModel::Init(const G4Nucleus & aNucleus, const G4DynamicParticle & aProjectile) |
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99 | { |
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100 | theProjectile = aProjectile; |
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101 | //G4cout<<"FTF init Pro "<<theProjectile.GetMass()<<" "<<theProjectile.GetMomentum()<<G4endl; |
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102 | //G4cout<<"FTF init A Z "<<aNucleus.GetA_asInt()<<" "<<aNucleus.GetZ_asInt()<<G4endl; |
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103 | //G4cout<<" "<<aNucleus.GetN()<<" "<<aNucleus.GetZ()<<G4endl; |
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104 | //G4int Uzhi; G4cin>>Uzhi; |
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105 | |
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106 | theParticipants.Init(aNucleus.GetA_asInt(),aNucleus.GetZ_asInt()); |
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107 | //G4cout<<"End nucl init"<<G4endl; |
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108 | // ----------- N-mass number Z-charge ------------------------- |
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109 | |
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110 | // --- cms energy |
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111 | G4double s = sqr( theProjectile.GetMass() ) + |
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112 | sqr( G4Proton::Proton()->GetPDGMass() ) + |
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113 | 2*theProjectile.GetTotalEnergy()*G4Proton::Proton()->GetPDGMass(); |
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114 | |
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115 | if( theParameters != 0 ) delete theParameters; |
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116 | theParameters = new G4FTFParameters(theProjectile.GetDefinition(), |
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117 | aNucleus.GetA_asInt(),aNucleus.GetZ_asInt(), |
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118 | s); |
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119 | // theParameters = new G4FTFParameters(theProjectile.GetDefinition(), |
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120 | // aNucleus.GetN(),aNucleus.GetZ(), |
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121 | // s); |
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122 | |
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123 | //theParameters->SetProbabilityOfElasticScatt(0.); |
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124 | //G4cout<<theParameters->GetProbabilityOfElasticScatt()<<G4endl; |
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125 | //G4int Uzhi; G4cin>>Uzhi; |
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126 | // To turn on/off (1/0) elastic scattering |
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127 | |
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128 | } |
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129 | |
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130 | // ------------------------------------------------------------ |
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131 | struct DeleteVSplitableHadron { void operator()(G4VSplitableHadron * aH){ delete aH;} }; |
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132 | |
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133 | |
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134 | // ------------------------------------------------------------ |
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135 | G4ExcitedStringVector * G4FTFModel::GetStrings() |
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136 | { |
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137 | G4ExcitedStringVector * theStrings(0); |
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138 | //G4cout<<"GetString"<<G4endl; |
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139 | theParticipants.GetList(theProjectile,theParameters); |
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140 | //G4cout<<"Reggeon"<<G4endl; |
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141 | ReggeonCascade(); |
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142 | |
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143 | G4bool Success(true); |
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144 | if( PutOnMassShell() ) |
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145 | { |
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146 | //G4cout<<"PutOn mass Shell OK"<<G4endl; |
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147 | if( ExciteParticipants() ) |
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148 | { |
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149 | //G4cout<<"Excite partic OK"<<G4endl; |
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150 | theStrings = BuildStrings(); |
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151 | //G4cout<<"Build String OK"<<G4endl; |
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152 | GetResidualNucleus(); |
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153 | |
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154 | if( theParameters != 0 ) |
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155 | { |
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156 | delete theParameters; |
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157 | theParameters=0; |
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158 | } |
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159 | } else // if( ExciteParticipants() ) |
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160 | { Success=false;} |
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161 | } else // if( PutOnMassShell() ) |
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162 | { Success=false;} |
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163 | |
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164 | if(!Success) |
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165 | { |
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166 | // -------------- Erase the projectile ---------------- |
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167 | std::vector<G4VSplitableHadron *> primaries; |
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168 | |
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169 | theParticipants.StartLoop(); // restart a loop |
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170 | while ( theParticipants.Next() ) |
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171 | { |
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172 | const G4InteractionContent & interaction=theParticipants.GetInteraction(); |
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173 | // do not allow for duplicates ... |
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174 | if ( primaries.end() == std::find(primaries.begin(), primaries.end(), |
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175 | interaction.GetProjectile()) ) |
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176 | primaries.push_back(interaction.GetProjectile()); |
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177 | } |
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178 | std::for_each(primaries.begin(), primaries.end(), DeleteVSplitableHadron()); |
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179 | primaries.clear(); |
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180 | } |
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181 | |
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182 | // -------------- Cleaning of the memory -------------- |
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183 | // -------------- Erase the target nucleons ----------- |
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184 | G4VSplitableHadron * aNucleon = 0; |
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185 | for(G4int i=0; i < NumberOfInvolvedNucleon; i++) |
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186 | { |
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187 | aNucleon = TheInvolvedNucleon[i]->GetSplitableHadron(); |
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188 | if(aNucleon) delete aNucleon; |
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189 | } |
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190 | |
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191 | NumberOfInvolvedNucleon=0; |
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192 | |
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193 | return theStrings; |
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194 | |
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195 | } |
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196 | //------------------------------------------------------------------- |
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197 | void G4FTFModel::ReggeonCascade() |
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198 | { //--- Implementation of reggeon theory inspired model------- |
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199 | NumberOfInvolvedNucleon=0; |
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200 | |
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201 | theParticipants.StartLoop(); |
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202 | while (theParticipants.Next()) |
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203 | { |
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204 | const G4InteractionContent & collision=theParticipants.GetInteraction(); |
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205 | G4Nucleon * TargetNucleon=collision.GetTargetNucleon(); |
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206 | |
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207 | TheInvolvedNucleon[NumberOfInvolvedNucleon]=TargetNucleon; |
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208 | NumberOfInvolvedNucleon++; |
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209 | //G4cout<<"Prim NumberOfInvolvedNucleon "<<NumberOfInvolvedNucleon<<G4endl; |
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210 | G4double XofWoundedNucleon = TargetNucleon->GetPosition().x(); |
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211 | G4double YofWoundedNucleon = TargetNucleon->GetPosition().y(); |
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212 | |
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213 | theParticipants.theNucleus->StartLoop(); |
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214 | G4Nucleon * Neighbour(0); |
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215 | |
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216 | while ( (Neighbour = theParticipants.theNucleus->GetNextNucleon()) ) |
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217 | { |
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218 | if(!Neighbour->AreYouHit()) |
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219 | { |
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220 | G4double impact2= sqr(XofWoundedNucleon - Neighbour->GetPosition().x()) + |
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221 | sqr(YofWoundedNucleon - Neighbour->GetPosition().y()); |
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222 | |
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223 | if(G4UniformRand() < theParameters->GetCofNuclearDestruction()* |
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224 | std::exp(-impact2/theParameters->GetR2ofNuclearDestruction())) |
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225 | { // The neighbour nucleon is involved in the reggeon cascade |
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226 | |
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227 | TheInvolvedNucleon[NumberOfInvolvedNucleon]=Neighbour; |
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228 | NumberOfInvolvedNucleon++; |
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229 | //G4cout<<"Seco NumberOfInvolvedNucleon "<<NumberOfInvolvedNucleon<<G4endl; |
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230 | |
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231 | G4VSplitableHadron *targetSplitable; |
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232 | targetSplitable = new G4DiffractiveSplitableHadron(*Neighbour); |
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233 | |
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234 | Neighbour->Hit(targetSplitable); |
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235 | targetSplitable->SetStatus(2); |
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236 | } |
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237 | } // end of if(!Neighbour->AreYouHit()) |
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238 | } // end of while (theParticipant.theNucleus->GetNextNucleon()) |
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239 | } // end of while (theParticipants.Next()) |
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240 | |
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241 | // ---------------- Calculation of creation time for each target nucleon ----------- |
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242 | theParticipants.StartLoop(); // restart a loop |
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243 | theParticipants.Next(); |
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244 | G4VSplitableHadron * primary = theParticipants.GetInteraction().GetProjectile(); |
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245 | G4double betta_z=primary->Get4Momentum().pz()/primary->Get4Momentum().e(); |
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246 | primary->SetTimeOfCreation(0.); |
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247 | |
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248 | G4double ZcoordinateOfPreviousCollision(0.); |
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249 | G4double ZcoordinateOfCurrentInteraction(0.); |
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250 | G4double TimeOfPreviousCollision(0.); |
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251 | G4double TimeOfCurrentCollision(0); |
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252 | |
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253 | theParticipants.theNucleus->StartLoop(); |
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254 | G4Nucleon * aNucleon; |
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255 | G4bool theFirstInvolvedNucleon(true); |
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256 | while ( (aNucleon = theParticipants.theNucleus->GetNextNucleon()) ) |
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257 | { |
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258 | if(aNucleon->AreYouHit()) |
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259 | { |
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260 | if(theFirstInvolvedNucleon) |
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261 | { |
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262 | ZcoordinateOfPreviousCollision=aNucleon->GetPosition().z(); |
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263 | theFirstInvolvedNucleon=false; |
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264 | } |
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265 | |
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266 | ZcoordinateOfCurrentInteraction=aNucleon->GetPosition().z(); |
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267 | TimeOfCurrentCollision=TimeOfPreviousCollision+ |
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268 | (ZcoordinateOfCurrentInteraction-ZcoordinateOfPreviousCollision)/betta_z; |
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269 | // It is assumed that the nucleons are ordered on increasing z-coordinate ------------ |
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270 | aNucleon->GetSplitableHadron()->SetTimeOfCreation(TimeOfCurrentCollision); |
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271 | |
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272 | ZcoordinateOfPreviousCollision=ZcoordinateOfCurrentInteraction; |
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273 | TimeOfPreviousCollision=TimeOfCurrentCollision; |
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274 | } // end of if(aNucleon->AreYouHit()) |
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275 | } // end of while (theParticipant.theNucleus->GetNextNucleon()) |
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276 | // |
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277 | // The algorithm can be improved, but it will be more complicated, and will require |
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278 | // changes in G4DiffractiveExcitation.cc and G4ElasticHNScattering.cc |
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279 | } // Uzhi 26 July 2009 |
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280 | |
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281 | // ------------------------------------------------------------ |
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282 | G4bool G4FTFModel::PutOnMassShell() |
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283 | { |
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284 | // -------------- Properties of the projectile ---------------- |
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285 | theParticipants.StartLoop(); // restart a loop |
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286 | theParticipants.Next(); |
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287 | G4VSplitableHadron * primary = theParticipants.GetInteraction().GetProjectile(); |
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288 | G4LorentzVector Pprojectile=primary->Get4Momentum(); |
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289 | |
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290 | //G4cout<<"Pprojectile "<<Pprojectile<<G4endl; |
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291 | // To get original projectile particle |
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292 | |
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293 | if(Pprojectile.z() < 0.){return false;} |
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294 | |
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295 | G4double Mprojectile = Pprojectile.mag(); |
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296 | G4double M2projectile = Pprojectile.mag2(); |
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297 | //------------------------------------------------------------- |
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298 | G4LorentzVector Psum = Pprojectile; |
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299 | G4double SumMasses = Mprojectile + 20.*MeV; // 13.12.09 |
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300 | // Separation energy for projectile |
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301 | //G4cout<<"SumMasses Pr "<<SumMasses<<G4endl; |
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302 | //--------------- Target nucleus ------------------------------ |
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303 | G4V3DNucleus *theNucleus = GetWoundedNucleus(); |
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304 | G4Nucleon * aNucleon; |
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305 | G4int ResidualMassNumber=theNucleus->GetMassNumber(); |
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306 | G4int ResidualCharge =theNucleus->GetCharge(); |
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307 | |
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308 | ResidualExcitationEnergy=0.; |
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309 | G4LorentzVector PnuclearResidual(0.,0.,0.,0.); |
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310 | |
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311 | G4double ExcitationEnergyPerWoundedNucleon= |
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312 | theParameters->GetExcitationEnergyPerWoundedNucleon(); |
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313 | |
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314 | theNucleus->StartLoop(); |
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315 | |
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316 | while ((aNucleon = theNucleus->GetNextNucleon())) |
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317 | { |
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318 | if(aNucleon->AreYouHit()) |
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319 | { // Involved nucleons |
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320 | Psum += aNucleon->Get4Momentum(); |
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321 | SumMasses += aNucleon->GetDefinition()->GetPDGMass(); |
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322 | SumMasses += 20.*MeV; // 13.12.09 Separation energy for a nucleon |
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323 | //G4cout<<"SumMasses Tr "<<SumMasses<<G4endl; |
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324 | ResidualMassNumber--; |
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325 | ResidualCharge-=(G4int) aNucleon->GetDefinition()->GetPDGCharge(); |
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326 | ResidualExcitationEnergy+=ExcitationEnergyPerWoundedNucleon; |
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327 | } |
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328 | else |
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329 | { // Spectator nucleons |
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330 | PnuclearResidual += aNucleon->Get4Momentum(); |
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331 | } // end of if(!aNucleon->AreYouHit()) |
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332 | } // end of while (theNucleus->GetNextNucleon()) |
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333 | |
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334 | Psum += PnuclearResidual; |
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335 | //G4cout<<"ResidualCharge ,ResidualMassNumber "<<ResidualCharge<<" "<<ResidualMassNumber<<G4endl; |
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336 | G4double ResidualMass(0.); |
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337 | if(ResidualMassNumber == 0) |
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338 | { |
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339 | ResidualMass=0.; |
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340 | ResidualExcitationEnergy=0.; |
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341 | } |
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342 | else |
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343 | { |
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344 | ResidualMass=G4ParticleTable::GetParticleTable()->GetIonTable()-> |
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345 | GetIonMass(ResidualCharge ,ResidualMassNumber); |
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346 | if(ResidualMassNumber == 1) {ResidualExcitationEnergy=0.;} |
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347 | } |
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348 | |
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349 | // ResidualMass +=ResidualExcitationEnergy; // Will be given after checks |
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350 | //G4cout<<"SumMasses And ResidualMass "<<SumMasses<<" "<<ResidualMass<<G4endl; |
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351 | SumMasses += ResidualMass; |
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352 | //G4cout<<"SumMasses + ResM "<<SumMasses<<G4endl; |
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353 | //G4cout<<"Psum "<<Psum<<G4endl; |
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354 | //------------------------------------------------------------- |
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355 | |
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356 | G4double SqrtS=Psum.mag(); |
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357 | G4double S=Psum.mag2(); |
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358 | |
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359 | //G4cout<<"SqrtS < SumMasses "<<SqrtS<<" "<<SumMasses<<G4endl; |
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360 | if(SqrtS < SumMasses) {return false;} // It is impossible to simulate |
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361 | // after putting nuclear nucleons |
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362 | // on mass-shell |
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363 | |
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364 | if(SqrtS < SumMasses+ResidualExcitationEnergy) {ResidualExcitationEnergy=0.;} |
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365 | |
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366 | ResidualMass +=ResidualExcitationEnergy; |
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367 | SumMasses +=ResidualExcitationEnergy; |
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368 | //G4cout<<"ResidualMass "<<ResidualMass<<" "<<SumMasses<<G4endl; |
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369 | //------------------------------------------------------------- |
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370 | // Sampling of nucleons what are transfered to delta-isobars -- |
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371 | G4int MaxNumberOfDeltas = (int)((SqrtS - SumMasses)/(400.*MeV)); |
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372 | G4int NumberOfDeltas(0); |
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373 | |
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374 | if(theNucleus->GetMassNumber() != 1) |
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375 | { |
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376 | G4double ProbDeltaIsobar(0.); // 1. *** Can be set if it is needed |
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377 | for(G4int i=0; i < NumberOfInvolvedNucleon; i++ ) |
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378 | { |
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379 | if((G4UniformRand() < ProbDeltaIsobar)&&(NumberOfDeltas < MaxNumberOfDeltas)) |
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380 | { |
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381 | NumberOfDeltas++; |
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382 | G4VSplitableHadron * targetSplitable=TheInvolvedNucleon[i]->GetSplitableHadron(); |
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383 | SumMasses-=targetSplitable->GetDefinition()->GetPDGMass(); |
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384 | |
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385 | G4int PDGcode = targetSplitable->GetDefinition()->GetPDGEncoding(); |
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386 | G4int newPDGcode = PDGcode/10; newPDGcode=newPDGcode*10+4; // Delta |
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387 | G4ParticleDefinition* ptr = |
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388 | G4ParticleTable::GetParticleTable()->FindParticle(newPDGcode); |
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389 | targetSplitable->SetDefinition(ptr); |
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390 | SumMasses+=targetSplitable->GetDefinition()->GetPDGMass(); |
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391 | } |
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392 | } // end of for(G4int i=0; i < NumberOfInvolvedNucleon; i++ ) |
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393 | } // end of if(theNucleus.GetMassNumber() != 1) |
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394 | //------------------------------------------------------------- |
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395 | |
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396 | G4LorentzRotation toCms(-1*Psum.boostVector()); |
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397 | G4LorentzVector Ptmp=toCms*Pprojectile; |
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398 | if ( Ptmp.pz() <= 0. ) |
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399 | { // "String" moving backwards in CMS, abort collision !! |
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400 | //G4cout << " abort ColliDeleteVSplitableHadronsion!! " << G4endl; |
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401 | return false; |
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402 | } |
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403 | |
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404 | // toCms.rotateZ(-1*Ptmp.phi()); // Uzhi 5.12.09 |
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405 | // toCms.rotateY(-1*Ptmp.theta()); // Uzhi 5.12.09 |
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406 | |
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407 | G4LorentzRotation toLab(toCms.inverse()); |
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408 | |
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409 | //------------------------------------------------------------- |
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410 | //------- Ascribing of the involved nucleons Pt and Xminus ---- |
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411 | G4double Dcor = theParameters->GetDofNuclearDestruction()/ |
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412 | theNucleus->GetMassNumber(); |
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413 | |
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414 | G4double AveragePt2 = theParameters->GetPt2ofNuclearDestruction(); |
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415 | G4double maxPtSquare = theParameters->GetMaxPt2ofNuclearDestruction(); |
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416 | //G4cout<<"Dcor "<<Dcor<<" AveragePt2 "<<AveragePt2<<G4endl; |
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417 | G4double M2target(0.); |
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418 | G4double WminusTarget(0.); |
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419 | G4double WplusProjectile(0.); |
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420 | |
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421 | G4int NumberOfTries(0); |
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422 | G4double ScaleFactor(1.); |
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423 | G4bool OuterSuccess(true); |
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424 | do // while (!OuterSuccess) |
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425 | { |
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426 | OuterSuccess=true; |
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427 | |
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428 | do // while (SqrtS < Mprojectile + std::sqrt(M2target)) |
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429 | { // while (DecayMomentum < 0.) |
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430 | |
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431 | NumberOfTries++; |
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432 | //G4cout<<"NumberOfTries "<<NumberOfTries<<G4endl; |
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433 | if(NumberOfTries == 100*(NumberOfTries/100)) // 100 |
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434 | { // At large number of tries it would be better to reduce the values |
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435 | ScaleFactor/=2.; |
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436 | Dcor *=ScaleFactor; |
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437 | AveragePt2 *=ScaleFactor; |
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438 | } |
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439 | |
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440 | G4ThreeVector PtSum(0.,0.,0.); |
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441 | G4double XminusSum(0.); |
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442 | G4double Xminus(0.); |
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443 | G4bool InerSuccess=true; |
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444 | |
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445 | do // while(!InerSuccess); |
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446 | { |
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447 | InerSuccess=true; |
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448 | |
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449 | PtSum =G4ThreeVector(0.,0.,0.); |
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450 | XminusSum=0.; |
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451 | |
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452 | for(G4int i=0; i < NumberOfInvolvedNucleon; i++ ) |
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453 | { |
---|
454 | G4Nucleon * aNucleon = TheInvolvedNucleon[i]; |
---|
455 | |
---|
456 | G4ThreeVector tmpPt = GaussianPt(AveragePt2, maxPtSquare); |
---|
457 | PtSum += tmpPt; |
---|
458 | G4ThreeVector tmpX=GaussianPt(Dcor*Dcor, 1.); |
---|
459 | Xminus=tmpX.x(); |
---|
460 | XminusSum+=Xminus; |
---|
461 | |
---|
462 | G4LorentzVector tmp(tmpPt.x(),tmpPt.y(),Xminus,0.); |
---|
463 | //G4cout<<"Inv i mom "<<i<<" "<<tmp<<G4endl; |
---|
464 | aNucleon->SetMomentum(tmp); |
---|
465 | } // end of for(G4int i=0; i < NumberOfInvolvedNucleon; i++ ) |
---|
466 | |
---|
467 | //--------------------------------------------------------------------------- |
---|
468 | G4double DeltaX(0.); |
---|
469 | G4double DeltaY(0.); |
---|
470 | G4double DeltaXminus(0.); |
---|
471 | |
---|
472 | //G4cout<<"ResidualMassNumber "<<ResidualMassNumber<<" "<<PtSum<<G4endl; |
---|
473 | if(ResidualMassNumber == 0) |
---|
474 | { |
---|
475 | DeltaX = PtSum.x()/NumberOfInvolvedNucleon; |
---|
476 | DeltaY = PtSum.y()/NumberOfInvolvedNucleon; |
---|
477 | DeltaXminus = (XminusSum-1.)/NumberOfInvolvedNucleon; |
---|
478 | } |
---|
479 | else |
---|
480 | { |
---|
481 | DeltaXminus = -1./theNucleus->GetMassNumber(); |
---|
482 | } |
---|
483 | //G4cout<<"Dx y xmin "<<DeltaX<<" "<<DeltaY<<" "<<DeltaXminus<<G4endl; |
---|
484 | XminusSum=1.; |
---|
485 | M2target =0.; |
---|
486 | |
---|
487 | for(G4int i=0; i < NumberOfInvolvedNucleon; i++ ) |
---|
488 | { |
---|
489 | G4Nucleon * aNucleon = TheInvolvedNucleon[i]; |
---|
490 | |
---|
491 | Xminus = aNucleon->Get4Momentum().pz() - DeltaXminus; |
---|
492 | XminusSum-=Xminus; |
---|
493 | //G4cout<<" i X-sum "<<i<<" "<<Xminus<<" "<<XminusSum<<G4endl; |
---|
494 | if(ResidualMassNumber == 0) // Uzhi 5.07.10 |
---|
495 | { |
---|
496 | if((Xminus <= 0.) || (Xminus > 1.)) {InerSuccess=false; break;} |
---|
497 | } else |
---|
498 | { |
---|
499 | if((Xminus <= 0.) || (Xminus > 1.) || |
---|
500 | (XminusSum <=0.) || (XminusSum > 1.)) {InerSuccess=false; break;} |
---|
501 | } // Uzhi 5.07.10 |
---|
502 | |
---|
503 | G4double Px=aNucleon->Get4Momentum().px() - DeltaX; |
---|
504 | G4double Py=aNucleon->Get4Momentum().py() - DeltaY; |
---|
505 | |
---|
506 | M2target +=(aNucleon->GetSplitableHadron()->GetDefinition()->GetPDGMass()* |
---|
507 | aNucleon->GetSplitableHadron()->GetDefinition()->GetPDGMass() + |
---|
508 | Px*Px + Py*Py)/Xminus; |
---|
509 | |
---|
510 | G4LorentzVector tmp(Px,Py,Xminus,0.); |
---|
511 | aNucleon->SetMomentum(tmp); |
---|
512 | } // end of for(G4int i=0; i < NumberOfInvolvedNucleon; i++ ) |
---|
513 | |
---|
514 | //G4cout<<"Rescale O.K."<<G4endl; |
---|
515 | |
---|
516 | if(InerSuccess && (ResidualMassNumber != 0)) |
---|
517 | { |
---|
518 | M2target +=(ResidualMass*ResidualMass + PtSum.mag2())/XminusSum; |
---|
519 | } |
---|
520 | //G4cout<<"InerSuccess "<<InerSuccess<<G4endl; |
---|
521 | //G4int Uzhi;G4cin>>Uzhi; |
---|
522 | } while(!InerSuccess); |
---|
523 | } while (SqrtS < Mprojectile + std::sqrt(M2target)); |
---|
524 | //------------------------------------------------------------- |
---|
525 | G4double DecayMomentum2= S*S+M2projectile*M2projectile+M2target*M2target |
---|
526 | -2.*S*M2projectile - 2.*S*M2target |
---|
527 | -2.*M2projectile*M2target; |
---|
528 | |
---|
529 | WminusTarget=(S-M2projectile+M2target+std::sqrt(DecayMomentum2))/2./SqrtS; |
---|
530 | WplusProjectile=SqrtS - M2target/WminusTarget; |
---|
531 | //G4cout<<"DecayMomentum2 "<<DecayMomentum2<<G4endl; |
---|
532 | //------------------------------------------------------------- |
---|
533 | for(G4int i=0; i < NumberOfInvolvedNucleon; i++ ) |
---|
534 | { |
---|
535 | G4Nucleon * aNucleon = TheInvolvedNucleon[i]; |
---|
536 | G4LorentzVector tmp=aNucleon->Get4Momentum(); |
---|
537 | |
---|
538 | G4double Mt2 = sqr(tmp.x())+sqr(tmp.y())+ |
---|
539 | aNucleon->GetSplitableHadron()->GetDefinition()->GetPDGMass()* |
---|
540 | aNucleon->GetSplitableHadron()->GetDefinition()->GetPDGMass(); |
---|
541 | G4double Xminus=tmp.z(); |
---|
542 | |
---|
543 | G4double Pz=-WminusTarget*Xminus/2. + Mt2/(2.*WminusTarget*Xminus); |
---|
544 | G4double E = WminusTarget*Xminus/2. + Mt2/(2.*WminusTarget*Xminus); |
---|
545 | |
---|
546 | if( E+Pz > WplusProjectile ){OuterSuccess=false; break;} |
---|
547 | } // end of for(G4int i=0; i < NumberOfInvolvedNucleon; i++ ) |
---|
548 | //G4int Uzhi;G4cin>>Uzhi; |
---|
549 | } while(!OuterSuccess); |
---|
550 | |
---|
551 | //------------------------------------------------------------- |
---|
552 | G4double Pzprojectile=WplusProjectile/2. - M2projectile/2./WplusProjectile; |
---|
553 | G4double Eprojectile =WplusProjectile/2. + M2projectile/2./WplusProjectile; |
---|
554 | Pprojectile.setPz(Pzprojectile); Pprojectile.setE(Eprojectile); |
---|
555 | |
---|
556 | Pprojectile.transform(toLab); // The work with the projectile |
---|
557 | primary->Set4Momentum(Pprojectile); // is finished at the moment. |
---|
558 | //G4cout<<"Final proj mom "<<primary->Get4Momentum()<<G4endl; |
---|
559 | |
---|
560 | //------------------------------------------------------------- |
---|
561 | G4ThreeVector Residual3Momentum(0.,0.,1.); |
---|
562 | |
---|
563 | for(G4int i=0; i < NumberOfInvolvedNucleon; i++ ) |
---|
564 | { |
---|
565 | G4Nucleon * aNucleon = TheInvolvedNucleon[i]; |
---|
566 | G4LorentzVector tmp=aNucleon->Get4Momentum(); |
---|
567 | Residual3Momentum-=tmp.vect(); |
---|
568 | |
---|
569 | G4double Mt2 = sqr(tmp.x())+sqr(tmp.y())+ |
---|
570 | aNucleon->GetSplitableHadron()->GetDefinition()->GetPDGMass()* |
---|
571 | aNucleon->GetSplitableHadron()->GetDefinition()->GetPDGMass(); |
---|
572 | G4double Xminus=tmp.z(); |
---|
573 | |
---|
574 | G4double Pz=-WminusTarget*Xminus/2. + Mt2/(2.*WminusTarget*Xminus); |
---|
575 | G4double E = WminusTarget*Xminus/2. + Mt2/(2.*WminusTarget*Xminus); |
---|
576 | |
---|
577 | tmp.setPz(Pz); |
---|
578 | tmp.setE(E); |
---|
579 | |
---|
580 | tmp.transform(toLab); |
---|
581 | |
---|
582 | aNucleon->SetMomentum(tmp); |
---|
583 | |
---|
584 | G4VSplitableHadron * targetSplitable=aNucleon->GetSplitableHadron(); |
---|
585 | targetSplitable->Set4Momentum(tmp); |
---|
586 | |
---|
587 | } // end of for(G4int i=0; i < NumberOfInvolvedNucleon; i++ ) |
---|
588 | |
---|
589 | //G4cout<<"ResidualMassNumber and Mom "<<ResidualMassNumber<<" "<<Residual3Momentum<<G4endl; |
---|
590 | G4double Mt2Residual=sqr(ResidualMass) + |
---|
591 | sqr(Residual3Momentum.x())+sqr(Residual3Momentum.y()); |
---|
592 | //========================== |
---|
593 | //G4cout<<"WminusTarget Residual3Momentum.z() "<<WminusTarget<<" "<<Residual3Momentum.z()<<G4endl; |
---|
594 | G4double PzResidual=0.; |
---|
595 | G4double EResidual =0.; |
---|
596 | if(ResidualMassNumber != 0) |
---|
597 | { |
---|
598 | PzResidual=-WminusTarget*Residual3Momentum.z()/2. + |
---|
599 | Mt2Residual/(2.*WminusTarget*Residual3Momentum.z()); |
---|
600 | EResidual = WminusTarget*Residual3Momentum.z()/2. + |
---|
601 | Mt2Residual/(2.*WminusTarget*Residual3Momentum.z()); |
---|
602 | } |
---|
603 | //========================== |
---|
604 | Residual4Momentum.setPx(Residual3Momentum.x()); |
---|
605 | Residual4Momentum.setPy(Residual3Momentum.y()); |
---|
606 | Residual4Momentum.setPz(PzResidual); |
---|
607 | Residual4Momentum.setE(EResidual); |
---|
608 | //G4cout<<"Residual4Momentum "<<Residual4Momentum<<G4endl; |
---|
609 | Residual4Momentum.transform(toLab); |
---|
610 | //------------------------------------------------------------- |
---|
611 | return true; |
---|
612 | } |
---|
613 | |
---|
614 | // ------------------------------------------------------------ |
---|
615 | G4bool G4FTFModel::ExciteParticipants() |
---|
616 | { |
---|
617 | G4bool Successfull(false); |
---|
618 | // do { // } while (Successfull == false) // Closed 15.12.09 |
---|
619 | Successfull=false; |
---|
620 | theParticipants.StartLoop(); |
---|
621 | |
---|
622 | G4int MaxNumOfInelCollisions=G4int(theParameters->GetMaxNumberOfCollisions()); |
---|
623 | G4double NumberOfInel(0.); |
---|
624 | // |
---|
625 | if(MaxNumOfInelCollisions > 0) |
---|
626 | { // Plab > Pbound, Normal application of FTF is possible |
---|
627 | G4double ProbMaxNumber=theParameters->GetMaxNumberOfCollisions()-MaxNumOfInelCollisions; |
---|
628 | if(G4UniformRand() < ProbMaxNumber) {MaxNumOfInelCollisions++;} |
---|
629 | NumberOfInel=MaxNumOfInelCollisions; |
---|
630 | } else |
---|
631 | { // Plab < Pbound, Normal application of FTF is impossible, low energy corrections |
---|
632 | if(theParticipants.theNucleus->GetMassNumber() > 1) |
---|
633 | { |
---|
634 | NumberOfInel = theParameters->GetProbOfInteraction(); |
---|
635 | MaxNumOfInelCollisions = 1; |
---|
636 | } else |
---|
637 | { // Special case for hadron-nucleon interactions |
---|
638 | NumberOfInel = 1.; |
---|
639 | MaxNumOfInelCollisions = 1; |
---|
640 | } |
---|
641 | } // end of if(MaxNumOfInelCollisions > 0) |
---|
642 | // |
---|
643 | while (theParticipants.Next()) |
---|
644 | { |
---|
645 | const G4InteractionContent & collision=theParticipants.GetInteraction(); |
---|
646 | |
---|
647 | G4VSplitableHadron * projectile=collision.GetProjectile(); |
---|
648 | G4VSplitableHadron * target=collision.GetTarget(); |
---|
649 | //G4cout<<"ProbabilityOfElasticScatt "<<theParameters->GetProbabilityOfElasticScatt()<<G4endl; |
---|
650 | if(G4UniformRand()< theParameters->GetProbabilityOfElasticScatt()) |
---|
651 | { // Elastic scattering ------------------------- |
---|
652 | //G4cout<<"Elastic FTF"<<G4endl; |
---|
653 | if(theElastic->ElasticScattering(projectile, target, theParameters)) |
---|
654 | { |
---|
655 | Successfull = Successfull || true; |
---|
656 | } else |
---|
657 | { |
---|
658 | Successfull = Successfull || false; |
---|
659 | target->SetStatus(2); |
---|
660 | } |
---|
661 | } |
---|
662 | else |
---|
663 | { // Inelastic scattering ---------------------- |
---|
664 | /* |
---|
665 | if(theExcitation->ExciteParticipants(projectile, target, |
---|
666 | theParameters, theElastic)) |
---|
667 | { |
---|
668 | Successfull = Successfull || true; |
---|
669 | } else |
---|
670 | { |
---|
671 | Successfull = Successfull || false; |
---|
672 | target->SetStatus(2); |
---|
673 | } |
---|
674 | */ |
---|
675 | //G4cout<<"InElastic FTF"<<G4endl; |
---|
676 | if(G4UniformRand()< NumberOfInel/MaxNumOfInelCollisions) |
---|
677 | { |
---|
678 | if(theExcitation->ExciteParticipants(projectile, target, |
---|
679 | theParameters, theElastic)) |
---|
680 | { |
---|
681 | Successfull = Successfull || true; |
---|
682 | NumberOfInel--; |
---|
683 | } else |
---|
684 | { |
---|
685 | Successfull = Successfull || false; |
---|
686 | target->SetStatus(2); |
---|
687 | } |
---|
688 | } else // If NumOfInel |
---|
689 | { |
---|
690 | if(theElastic->ElasticScattering(projectile, target, theParameters)) |
---|
691 | { |
---|
692 | Successfull = Successfull || true; |
---|
693 | } else |
---|
694 | { |
---|
695 | Successfull = Successfull || false; |
---|
696 | target->SetStatus(2); |
---|
697 | } |
---|
698 | } // end if NumOfInel |
---|
699 | } |
---|
700 | } // end of while (theParticipants.Next()) |
---|
701 | // } while (Successfull == false); // Closed 15.12.09 |
---|
702 | return Successfull; |
---|
703 | } |
---|
704 | // ------------------------------------------------------------ |
---|
705 | G4ExcitedStringVector * G4FTFModel::BuildStrings() |
---|
706 | { |
---|
707 | // Loop over all collisions; find all primaries, and all target ( targets may |
---|
708 | // be duplicate in the List ( to unique G4VSplitableHadrons) |
---|
709 | |
---|
710 | G4ExcitedStringVector * strings; |
---|
711 | strings = new G4ExcitedStringVector(); |
---|
712 | |
---|
713 | std::vector<G4VSplitableHadron *> primaries; |
---|
714 | |
---|
715 | G4ExcitedString * FirstString(0); // If there will be a kink, |
---|
716 | G4ExcitedString * SecondString(0); // two strings will be produced. |
---|
717 | |
---|
718 | theParticipants.StartLoop(); // restart a loop |
---|
719 | // |
---|
720 | while ( theParticipants.Next() ) |
---|
721 | { |
---|
722 | const G4InteractionContent & interaction=theParticipants.GetInteraction(); |
---|
723 | // do not allow for duplicates ... |
---|
724 | |
---|
725 | if ( primaries.end() == std::find(primaries.begin(), primaries.end(), |
---|
726 | interaction.GetProjectile()) ) |
---|
727 | primaries.push_back(interaction.GetProjectile()); |
---|
728 | } |
---|
729 | |
---|
730 | unsigned int ahadron; |
---|
731 | for ( ahadron=0; ahadron < primaries.size() ; ahadron++) |
---|
732 | { |
---|
733 | G4bool isProjectile(0); |
---|
734 | if(primaries[ahadron]->GetStatus() == 1) {isProjectile=true; } |
---|
735 | if(primaries[ahadron]->GetStatus() == 3) {isProjectile=false;} |
---|
736 | |
---|
737 | FirstString=0; SecondString=0; |
---|
738 | theExcitation->CreateStrings(primaries[ahadron], isProjectile, |
---|
739 | FirstString, SecondString, |
---|
740 | theParameters); |
---|
741 | |
---|
742 | if(FirstString != 0) strings->push_back(FirstString); |
---|
743 | if(SecondString != 0) strings->push_back(SecondString); |
---|
744 | } |
---|
745 | // |
---|
746 | for (G4int ahadron=0; ahadron < NumberOfInvolvedNucleon ; ahadron++) |
---|
747 | { |
---|
748 | if(TheInvolvedNucleon[ahadron]->GetSplitableHadron()->GetStatus() !=0) //== 2) |
---|
749 | { |
---|
750 | G4bool isProjectile=false; |
---|
751 | FirstString=0; SecondString=0; |
---|
752 | theExcitation->CreateStrings( |
---|
753 | TheInvolvedNucleon[ahadron]->GetSplitableHadron(), |
---|
754 | isProjectile, |
---|
755 | FirstString, SecondString, |
---|
756 | theParameters); |
---|
757 | if(FirstString != 0) strings->push_back(FirstString); |
---|
758 | if(SecondString != 0) strings->push_back(SecondString); |
---|
759 | } |
---|
760 | } |
---|
761 | |
---|
762 | std::for_each(primaries.begin(), primaries.end(), DeleteVSplitableHadron()); |
---|
763 | primaries.clear(); |
---|
764 | return strings; |
---|
765 | } |
---|
766 | // ------------------------------------------------------------ |
---|
767 | void G4FTFModel::GetResidualNucleus() |
---|
768 | { // This method is needed for the correct application of G4PrecompoundModelInterface |
---|
769 | G4double DeltaExcitationE=ResidualExcitationEnergy/ |
---|
770 | (G4double) NumberOfInvolvedNucleon; |
---|
771 | G4LorentzVector DeltaPResidualNucleus = Residual4Momentum/ |
---|
772 | (G4double) NumberOfInvolvedNucleon; |
---|
773 | |
---|
774 | for(G4int i=0; i < NumberOfInvolvedNucleon; i++ ) |
---|
775 | { |
---|
776 | G4Nucleon * aNucleon = TheInvolvedNucleon[i]; |
---|
777 | // G4LorentzVector tmp=aNucleon->Get4Momentum()-DeltaPResidualNucleus; |
---|
778 | G4LorentzVector tmp=-DeltaPResidualNucleus; |
---|
779 | aNucleon->SetMomentum(tmp); |
---|
780 | aNucleon->SetBindingEnergy(DeltaExcitationE); |
---|
781 | } // end of for(G4int i=0; i < NumberOfInvolvedNucleon; i++ ) |
---|
782 | |
---|
783 | } |
---|
784 | |
---|
785 | // ------------------------------------------------------------ |
---|
786 | G4ThreeVector G4FTFModel::GaussianPt(G4double AveragePt2, G4double maxPtSquare) const |
---|
787 | { // @@ this method is used in FTFModel as well. Should go somewhere common! |
---|
788 | |
---|
789 | G4double Pt2(0.); |
---|
790 | if(AveragePt2 <= 0.) {Pt2=0.;} |
---|
791 | else |
---|
792 | { |
---|
793 | Pt2 = -AveragePt2 * std::log(1. + G4UniformRand() * |
---|
794 | (std::exp(-maxPtSquare/AveragePt2)-1.)); |
---|
795 | } |
---|
796 | G4double Pt=std::sqrt(Pt2); |
---|
797 | G4double phi=G4UniformRand() * twopi; |
---|
798 | |
---|
799 | return G4ThreeVector (Pt*std::cos(phi), Pt*std::sin(phi), 0.); |
---|
800 | } |
---|