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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: G4DiffractiveExcitation.cc,v 1.16 2009/10/06 10:10:36 vuzhinsk Exp $ |
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28 | // ------------------------------------------------------------ |
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29 | // GEANT 4 class implemetation file |
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30 | // |
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31 | // ---------------- G4DiffractiveExcitation -------------- |
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32 | // by Gunter Folger, October 1998. |
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33 | // diffractive Excitation used by strings models |
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34 | // Take a projectile and a target |
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35 | // excite the projectile and target |
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36 | // Essential changed by V. Uzhinsky in November - December 2006 |
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37 | // in order to put it in a correspondence with original FRITIOF |
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38 | // model. Variant of FRITIOF with nucleon de-excitation is implemented. |
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39 | // Other changes by V.Uzhinsky in May 2007 were introduced to fit |
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40 | // meson-nucleon interactions. Additional changes by V. Uzhinsky |
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41 | // were introduced in December 2006. They treat diffraction dissociation |
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42 | // processes more exactly. |
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43 | // --------------------------------------------------------------------- |
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44 | |
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45 | |
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46 | #include "globals.hh" |
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47 | #include "Randomize.hh" |
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48 | |
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49 | #include "G4DiffractiveExcitation.hh" |
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50 | #include "G4FTFParameters.hh" |
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51 | #include "G4ElasticHNScattering.hh" |
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52 | |
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53 | #include "G4LorentzRotation.hh" |
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54 | #include "G4RotationMatrix.hh" |
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55 | #include "G4ThreeVector.hh" |
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56 | #include "G4ParticleDefinition.hh" |
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57 | #include "G4VSplitableHadron.hh" |
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58 | #include "G4ExcitedString.hh" |
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59 | #include "G4ParticleTable.hh" |
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60 | #include "G4Neutron.hh" |
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61 | #include "G4ParticleDefinition.hh" |
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62 | |
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63 | //#include "G4ios.hh" |
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64 | //#include "UZHI_diffraction.hh" |
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65 | |
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66 | G4DiffractiveExcitation::G4DiffractiveExcitation() |
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67 | { |
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68 | } |
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69 | |
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70 | // --------------------------------------------------------------------- |
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71 | G4bool G4DiffractiveExcitation:: |
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72 | ExciteParticipants(G4VSplitableHadron *projectile, |
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73 | G4VSplitableHadron *target, |
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74 | G4FTFParameters *theParameters, |
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75 | G4ElasticHNScattering *theElastic) const // Uzhi 03.09.09 |
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76 | { |
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77 | // -------------------- Projectile parameters ----------------------- |
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78 | G4LorentzVector Pprojectile=projectile->Get4Momentum(); |
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79 | //G4cout<<"Excite P "<<Pprojectile<<G4endl; |
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80 | |
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81 | if(Pprojectile.z() < 0.) |
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82 | { |
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83 | target->SetStatus(2); |
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84 | return false; |
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85 | } |
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86 | |
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87 | G4double ProjectileRapidity = Pprojectile.rapidity(); |
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88 | |
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89 | G4int ProjectilePDGcode=projectile->GetDefinition()->GetPDGEncoding(); |
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90 | // G4ParticleDefinition * ProjectileDefinition = projectile->GetDefinition(); |
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91 | G4int absProjectilePDGcode=std::abs(ProjectilePDGcode); |
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92 | |
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93 | G4bool PutOnMassShell(false); |
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94 | // G4double M0projectile=projectile->GetDefinition()->GetPDGMass(); // With de-excitation |
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95 | G4double M0projectile = Pprojectile.mag(); // Without de-excitation |
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96 | |
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97 | if(M0projectile < projectile->GetDefinition()->GetPDGMass()) |
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98 | { |
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99 | PutOnMassShell=true; |
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100 | M0projectile=projectile->GetDefinition()->GetPDGMass(); |
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101 | } |
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102 | |
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103 | G4double M0projectile2 = M0projectile * M0projectile; |
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104 | |
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105 | G4double ProjectileDiffStateMinMass=theParameters->GetProjMinDiffMass(); |
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106 | G4double ProjectileNonDiffStateMinMass=theParameters->GetProjMinNonDiffMass(); |
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107 | G4double ProbProjectileDiffraction=theParameters->GetProbabilityOfProjDiff(); |
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108 | |
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109 | // -------------------- Target parameters ------------------------- |
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110 | G4int TargetPDGcode=target->GetDefinition()->GetPDGEncoding(); |
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111 | G4int absTargetPDGcode=std::abs(TargetPDGcode); |
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112 | |
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113 | G4LorentzVector Ptarget=target->Get4Momentum(); |
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114 | |
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115 | G4double M0target = Ptarget.mag(); |
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116 | |
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117 | //G4cout<<"Excite T "<<Ptarget<<G4endl; |
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118 | //G4cout<<"PDGs "<<ProjectilePDGcode<<" "<<TargetPDGcode<<G4endl; |
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119 | //G4cout<<"Masses "<<M0projectile<<" "<<M0target<<G4endl; |
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120 | |
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121 | G4double TargetRapidity = Ptarget.rapidity(); |
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122 | |
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123 | if(M0target < target->GetDefinition()->GetPDGMass()) |
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124 | { |
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125 | PutOnMassShell=true; |
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126 | M0target=target->GetDefinition()->GetPDGMass(); |
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127 | } |
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128 | |
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129 | G4double M0target2 = M0target * M0target; |
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130 | |
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131 | G4double TargetDiffStateMinMass=theParameters->GetTarMinDiffMass(); |
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132 | G4double TargetNonDiffStateMinMass=theParameters->GetTarMinNonDiffMass(); |
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133 | G4double ProbTargetDiffraction=theParameters->GetProbabilityOfTarDiff(); |
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134 | |
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135 | G4double AveragePt2=theParameters->GetAveragePt2(); |
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136 | |
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137 | G4double ProbOfDiffraction=ProbProjectileDiffraction + |
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138 | ProbTargetDiffraction; |
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139 | |
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140 | G4double SumMasses=M0projectile+M0target+200.*MeV; |
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141 | |
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142 | // Kinematical properties of the interactions -------------- |
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143 | G4LorentzVector Psum; // 4-momentum in CMS |
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144 | Psum=Pprojectile+Ptarget; |
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145 | G4double S=Psum.mag2(); |
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146 | |
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147 | // Transform momenta to cms and then rotate parallel to z axis; |
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148 | G4LorentzRotation toCms(-1*Psum.boostVector()); |
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149 | |
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150 | G4LorentzVector Ptmp=toCms*Pprojectile; |
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151 | if ( Ptmp.pz() <= 0. ) |
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152 | { |
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153 | target->SetStatus(2); |
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154 | // "String" moving backwards in CMS, abort collision !! |
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155 | return false; |
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156 | } |
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157 | |
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158 | toCms.rotateZ(-1*Ptmp.phi()); |
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159 | toCms.rotateY(-1*Ptmp.theta()); |
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160 | |
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161 | G4LorentzRotation toLab(toCms.inverse()); |
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162 | |
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163 | Pprojectile.transform(toCms); |
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164 | Ptarget.transform(toCms); |
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165 | |
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166 | G4double PZcms2, PZcms; |
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167 | |
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168 | G4double SqrtS=std::sqrt(S); |
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169 | //G4cout<<" SqrtS "<<SqrtS<<" 2200 "<<G4endl; |
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170 | if(absProjectilePDGcode > 1000 && SqrtS < 2300*MeV && SqrtS < SumMasses) |
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171 | {target->SetStatus(2); return false;} // The model cannot work for |
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172 | // p+p-interactions |
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173 | // at Plab < 1.62 GeV/c. |
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174 | |
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175 | if(( absProjectilePDGcode == 211 || ProjectilePDGcode == 111) && |
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176 | (SqrtS < 1600*MeV) && (SqrtS < SumMasses)) |
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177 | {target->SetStatus(2); return false;} // The model cannot work for |
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178 | // Pi+p-interactions |
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179 | // at Plab < 1. GeV/c. |
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180 | |
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181 | if(( (absProjectilePDGcode == 321) || (ProjectilePDGcode == -311) || |
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182 | (absProjectilePDGcode == 311) || (absProjectilePDGcode == 130) || |
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183 | (absProjectilePDGcode == 310)) && (SqrtS < 1600*MeV) && (SqrtS < SumMasses)) |
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184 | {target->SetStatus(2); return false;} // The model cannot work for |
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185 | // K+p-interactions |
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186 | // at Plab < ??? GeV/c. ??? |
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187 | |
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188 | PZcms2=(S*S+M0projectile2*M0projectile2+M0target2*M0target2- |
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189 | 2*S*M0projectile2 - 2*S*M0target2 - 2*M0projectile2*M0target2) |
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190 | /4./S; |
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191 | |
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192 | if(PZcms2 < 0) |
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193 | {target->SetStatus(2); return false;} // It can be in an interaction with |
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194 | // off-shell nuclear nucleon |
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195 | |
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196 | PZcms = std::sqrt(PZcms2); |
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197 | |
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198 | if(PutOnMassShell) |
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199 | { |
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200 | if(Pprojectile.z() > 0.) |
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201 | { |
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202 | Pprojectile.setPz( PZcms); |
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203 | Ptarget.setPz( -PZcms); |
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204 | } |
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205 | else |
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206 | { |
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207 | Pprojectile.setPz(-PZcms); |
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208 | Ptarget.setPz( PZcms); |
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209 | }; |
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210 | |
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211 | Pprojectile.setE(std::sqrt(M0projectile2 + |
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212 | Pprojectile.x()*Pprojectile.x()+ |
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213 | Pprojectile.y()*Pprojectile.y()+ |
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214 | PZcms2)); |
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215 | Ptarget.setE(std::sqrt(M0target2 + |
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216 | Ptarget.x()*Ptarget.x()+ |
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217 | Ptarget.y()*Ptarget.y()+ |
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218 | PZcms2)); |
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219 | } |
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220 | |
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221 | G4double maxPtSquare; // = PZcms2; |
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222 | |
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223 | // Charge exchange can be possible for baryons ----------------- |
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224 | |
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225 | //G4cout<<1./std::exp(-2.0*(ProjectileRapidity - TargetRapidity))<<G4endl; |
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226 | //G4int Uzhi; G4cin>>Uzhi; |
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227 | // Getting the values needed for exchange ---------------------- |
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228 | G4double MagQuarkExchange =theParameters->GetMagQuarkExchange(); |
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229 | G4double SlopeQuarkExchange =theParameters->GetSlopeQuarkExchange(); |
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230 | G4double DeltaProbAtQuarkExchange=theParameters->GetDeltaProbAtQuarkExchange(); |
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231 | |
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232 | // G4double NucleonMass= |
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233 | (G4ParticleTable::GetParticleTable()->FindParticle(2112))->GetPDGMass(); |
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234 | G4double DeltaMass= |
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235 | (G4ParticleTable::GetParticleTable()->FindParticle(2224))->GetPDGMass(); |
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236 | |
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237 | // Check for possible quark excjane ----------------------------------- |
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238 | if(G4UniformRand() < MagQuarkExchange* |
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239 | std::exp(-SlopeQuarkExchange*(ProjectileRapidity - TargetRapidity))) |
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240 | { |
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241 | |
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242 | //G4cout<<"Exchange "<<G4endl; |
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243 | |
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244 | G4int NewProjCode(0), NewTargCode(0); |
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245 | |
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246 | //G4bool StandardExcitation(false); // ================================= |
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247 | G4int ProjQ1(0), ProjQ2(0), ProjQ3(0); |
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248 | |
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249 | // Projectile unpacking -------------------------- |
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250 | if(absProjectilePDGcode < 1000 ) |
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251 | { // projectile is meson ----------------- |
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252 | UnpackMeson(ProjectilePDGcode, ProjQ1, ProjQ2); |
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253 | } else |
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254 | { // projectile is baryon ---------------- |
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255 | UnpackBaryon(ProjectilePDGcode, ProjQ1, ProjQ2, ProjQ3); |
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256 | } // End of the hadron's unpacking ---------- |
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257 | |
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258 | // Target unpacking ------------------------------ |
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259 | G4int TargQ1(0), TargQ2(0), TargQ3(0); |
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260 | UnpackBaryon(TargetPDGcode, TargQ1, TargQ2, TargQ3); |
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261 | |
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262 | // Sampling of exchanged quarks ------------------- |
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263 | G4int ProjExchangeQ(0); |
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264 | G4int TargExchangeQ(0); |
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265 | |
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266 | //G4cout<<"Targ "<<TargQ1<<" "<<TargQ2<<" "<<TargQ3<<G4endl; |
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267 | if(absProjectilePDGcode < 1000 ) |
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268 | { // projectile is meson ----------------- |
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269 | //G4cout<<"Proj Q1 Q2 "<<ProjQ1<<" "<<ProjQ2<<G4endl; |
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270 | |
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271 | if(ProjQ1 > 0 ) // ProjQ1 is quark |
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272 | { |
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273 | ProjExchangeQ = ProjQ1; |
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274 | if(ProjExchangeQ != TargQ1) |
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275 | { |
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276 | TargExchangeQ = TargQ1; TargQ1=ProjExchangeQ; ProjQ1=TargExchangeQ; |
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277 | } else |
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278 | if(ProjExchangeQ != TargQ2) |
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279 | { |
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280 | TargExchangeQ = TargQ2; TargQ2=ProjExchangeQ; ProjQ1=TargExchangeQ; |
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281 | } else |
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282 | { |
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283 | TargExchangeQ = TargQ3; TargQ3=ProjExchangeQ; ProjQ1=TargExchangeQ; |
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284 | } |
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285 | //G4cout<<" Pr Tr "<<ProjQ1<<" "<<TargQ1<<" "<<TargQ2<<" "<<TargQ3<<G4endl; |
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286 | } else // ProjQ2 is quark |
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287 | { |
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288 | ProjExchangeQ = ProjQ2; |
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289 | if(ProjExchangeQ != TargQ1) |
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290 | { |
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291 | TargExchangeQ = TargQ1; TargQ1=ProjExchangeQ; ProjQ2=TargExchangeQ; |
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292 | } else |
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293 | if(ProjExchangeQ != TargQ2) |
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294 | { |
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295 | TargExchangeQ = TargQ2; TargQ2=ProjExchangeQ; ProjQ2=TargExchangeQ; |
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296 | } else |
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297 | { |
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298 | TargExchangeQ = TargQ3; TargQ3=ProjExchangeQ; ProjQ2=TargExchangeQ; |
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299 | } |
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300 | |
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301 | } // End of if(ProjQ1 > 0 ) // ProjQ1 is quark |
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302 | |
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303 | G4int aProjQ1=std::abs(ProjQ1); |
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304 | G4int aProjQ2=std::abs(ProjQ2); |
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305 | if(aProjQ1 == aProjQ2) {NewProjCode = 111;} // Pi0-meson |
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306 | else // |ProjQ1| # |ProjQ2| |
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307 | { |
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308 | if(aProjQ1 > aProjQ2) {NewProjCode = aProjQ1*100+aProjQ2*10+1;} |
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309 | else {NewProjCode = aProjQ2*100+aProjQ1*10+1;} |
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310 | } |
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311 | |
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312 | // projectile->SetDefinition( |
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313 | // G4ParticleTable::GetParticleTable()->FindParticle(NewProjCode)); |
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314 | |
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315 | NewTargCode = NewNucleonId(TargQ1, TargQ2, TargQ3); |
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316 | |
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317 | if( (TargQ1 == TargQ2) && (TargQ1 == TargQ3) && |
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318 | (SqrtS > M0projectile+DeltaMass)) {NewTargCode +=2;} //Create Delta isobar |
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319 | |
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320 | else if( target->GetDefinition()->GetPDGiIsospin() == 3 ) //Delta was the target |
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321 | { if(G4UniformRand() > DeltaProbAtQuarkExchange){NewTargCode +=2;} //Save Delta isobar |
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322 | else {} // De-excite initial Delta isobar |
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323 | } |
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324 | |
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325 | else if((G4UniformRand() < DeltaProbAtQuarkExchange) && //Nucleon was the target |
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326 | (SqrtS > M0projectile+DeltaMass)) {NewTargCode +=2;} //Create Delta isobar |
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327 | else {} //Save initial nucleon |
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328 | |
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329 | target->SetDefinition( |
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330 | G4ParticleTable::GetParticleTable()->FindParticle(NewTargCode)); |
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331 | //G4cout<<"New PDGs "<<NewProjCode<<" "<<NewTargCode<<G4endl; |
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332 | //G4int Uzhi; G4cin>>Uzhi; |
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333 | //} |
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334 | } else |
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335 | { // projectile is baryon ---------------- |
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336 | G4double Same=0.; //0.3; //0.5; |
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337 | G4bool ProjDeltaHasCreated(false); |
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338 | G4bool TargDeltaHasCreated(false); |
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339 | |
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340 | G4double Ksi=G4UniformRand(); |
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341 | if(G4UniformRand() < 0.5) // Sampling exchange quark from proj. or targ. |
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342 | { // Sampling exchanged quark from the projectile --- |
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343 | //G4cout<<"Proj Exc"<<G4endl; |
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344 | if( Ksi < 0.333333 ) |
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345 | {ProjExchangeQ = ProjQ1;} |
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346 | else if( (0.333333 <= Ksi) && (Ksi < 0.666667)) |
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347 | {ProjExchangeQ = ProjQ2;} |
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348 | else |
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349 | {ProjExchangeQ = ProjQ3;} |
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350 | //G4cout<<"ProjExchangeQ "<<ProjExchangeQ<<G4endl; |
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351 | |
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352 | if((ProjExchangeQ != TargQ1)||(G4UniformRand()<Same)) // Vova |
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353 | { |
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354 | TargExchangeQ = TargQ1; TargQ1=ProjExchangeQ; ProjExchangeQ=TargExchangeQ; |
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355 | } else |
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356 | if((ProjExchangeQ != TargQ2)||(G4UniformRand()<Same)) // Vova |
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357 | { |
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358 | TargExchangeQ = TargQ2; TargQ2=ProjExchangeQ; ProjExchangeQ=TargExchangeQ; |
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359 | } else |
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360 | { |
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361 | TargExchangeQ = TargQ3; TargQ3=ProjExchangeQ; ProjExchangeQ=TargExchangeQ; |
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362 | } |
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363 | //G4cout<<"ProjExchangeQ "<<ProjExchangeQ<<G4endl; |
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364 | if( Ksi < 0.333333 ) |
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365 | {ProjQ1=ProjExchangeQ;} |
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366 | else if( (0.333333 <= Ksi) && (Ksi < 0.666667)) |
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367 | {ProjQ2=ProjExchangeQ;} |
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368 | else |
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369 | {ProjQ3=ProjExchangeQ;} |
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370 | |
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371 | /* |
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372 | NewProjCode = NewNucleonId(ProjQ1, ProjQ2, ProjQ3); // ***************************** |
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373 | |
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374 | if((ProjQ1==ProjQ2) && (ProjQ1==ProjQ3)) {NewProjCode +=2; ProjDeltaHasCreated=true;} |
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375 | else if(projectile->GetDefinition()->GetPDGiIsospin() == 3)// Projectile was Delta |
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376 | { if(G4UniformRand() > DeltaProbAtQuarkExchange) |
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377 | {NewProjCode +=2; ProjDeltaHasCreated=true;} |
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378 | else {NewProjCode +=0; ProjDeltaHasCreated=false;} |
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379 | } |
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380 | else // Projectile was Nucleon |
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381 | { |
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382 | if((G4UniformRand() < DeltaProbAtQuarkExchange) && (SqrtS > DeltaMass+M0target)) |
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383 | {NewProjCode +=2; ProjDeltaHasCreated=true;} |
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384 | else {NewProjCode +=0; ProjDeltaHasCreated=false;} |
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385 | } |
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386 | |
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387 | NewTargCode = NewNucleonId(TargQ1, TargQ2, TargQ3); // ***************************** |
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388 | |
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389 | if((TargQ1==TargQ2) && (TargQ1==TargQ3)) {NewTargCode +=2; TargDeltaHasCreated=true;} |
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390 | else if(target->GetDefinition()->GetPDGiIsospin() == 3) // Target was Delta |
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391 | { if(G4UniformRand() > DeltaProbAtQuarkExchange) |
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392 | {NewTargCode +=2; TargDeltaHasCreated=true;} |
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393 | else {NewTargCode +=0; TargDeltaHasCreated=false;} |
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394 | } |
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395 | else // Target was Nucleon |
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396 | { |
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397 | if((G4UniformRand() < DeltaProbAtQuarkExchange) && (SqrtS > M0projectile+DeltaMass)) |
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398 | {NewTargCode +=2; TargDeltaHasCreated=true;} |
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399 | else {NewTargCode +=0; TargDeltaHasCreated=false;} |
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400 | } |
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401 | |
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402 | if((absProjectilePDGcode == NewProjCode) && (absTargetPDGcode == NewTargCode)) |
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403 | { // Nothing was changed! It is not right!? |
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404 | } |
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405 | */ |
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406 | /*----------------------------------------------------------------------------------------- |
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407 | if(!ProjDeltaHasCreated && !TargDeltaHasCreated) // No Deltas were created then |
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408 | { if( G4UniformRand() < 0.5) {NewProjCode +=2; ProjDeltaHasCreated = true;} |
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409 | else {NewTargCode +=2; TargDeltaHasCreated = true;} |
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410 | } |
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411 | |
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412 | if(!(ProjDeltaHasCreated && TargDeltaHasCreated)) |
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413 | { |
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414 | if((G4UniformRand() < DeltaProbAtQuarkExchange) && (SqrtS >2600.)) |
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415 | { |
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416 | G4cout<<"2 Deltas "<<G4endl; |
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417 | if(!ProjDeltaHasCreated) |
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418 | {NewProjCode +=2; ProjDeltaHasCreated = true;} |
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419 | else {NewTargCode +=2; TargDeltaHasCreated = true;} // For Delta isobar |
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420 | } |
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421 | } |
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422 | */ |
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423 | } else |
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424 | { // Sampling exchanged quark from the target ------- |
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425 | //G4cout<<"Targ Exc"<<G4endl; |
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426 | if( Ksi < 0.333333 ) |
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427 | {TargExchangeQ = TargQ1;} |
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428 | else if( (0.333333 <= Ksi) && (Ksi < 0.666667)) |
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429 | {TargExchangeQ = TargQ2;} |
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430 | else |
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431 | {TargExchangeQ = TargQ3;} |
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432 | //G4cout<<"TargExchangeQ "<<TargExchangeQ<<G4endl; |
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433 | if((TargExchangeQ != ProjQ1)||(G4UniformRand()<Same)) // Vova |
---|
434 | { |
---|
435 | ProjExchangeQ = ProjQ1; ProjQ1=TargExchangeQ; TargExchangeQ=ProjExchangeQ; |
---|
436 | } else |
---|
437 | if((TargExchangeQ != ProjQ2)||(G4UniformRand()<Same)) // Vova |
---|
438 | { |
---|
439 | ProjExchangeQ = ProjQ2; ProjQ2=TargExchangeQ; TargExchangeQ=ProjExchangeQ; |
---|
440 | } else |
---|
441 | { |
---|
442 | ProjExchangeQ = ProjQ3; ProjQ3=TargExchangeQ; TargExchangeQ=ProjExchangeQ; |
---|
443 | } |
---|
444 | //G4cout<<"TargExchangeQ "<<TargExchangeQ<<G4endl; |
---|
445 | if( Ksi < 0.333333 ) |
---|
446 | {TargQ1=TargExchangeQ;} |
---|
447 | else if( (0.333333 <= Ksi) && (Ksi < 0.666667)) |
---|
448 | {TargQ2=TargExchangeQ;} |
---|
449 | else |
---|
450 | {TargQ3=TargExchangeQ;} |
---|
451 | /* |
---|
452 | NewProjCode = NewNucleonId(ProjQ1, ProjQ2, ProjQ3); |
---|
453 | if( (ProjQ1 == ProjQ2) && (ProjQ1 == ProjQ3) ) |
---|
454 | {NewProjCode +=2; ProjDeltaHasCreated = true;} |
---|
455 | |
---|
456 | NewTargCode = NewNucleonId(TargQ1, TargQ2, TargQ3); |
---|
457 | if( (TargQ1 == TargQ2) && (TargQ1 == TargQ3) ) |
---|
458 | {NewTargCode +=2; TargDeltaHasCreated = true;} |
---|
459 | |
---|
460 | if(!ProjDeltaHasCreated && !TargDeltaHasCreated) |
---|
461 | {NewTargCode +=2; TargDeltaHasCreated = true;} |
---|
462 | |
---|
463 | if(!(ProjDeltaHasCreated && TargDeltaHasCreated)) |
---|
464 | { |
---|
465 | if((G4UniformRand() < DeltaProbAtQuarkExchange) && (SqrtS >2600.)) |
---|
466 | { |
---|
467 | G4cout<<"2 Deltas "<<G4endl; |
---|
468 | if(!ProjDeltaHasCreated) |
---|
469 | {NewProjCode +=2; ProjDeltaHasCreated = true;} |
---|
470 | else {NewTargCode +=2; TargDeltaHasCreated = true;} |
---|
471 | } |
---|
472 | } |
---|
473 | */ |
---|
474 | } // End of sampling baryon |
---|
475 | |
---|
476 | NewProjCode = NewNucleonId(ProjQ1, ProjQ2, ProjQ3); // ***************************** |
---|
477 | |
---|
478 | if((ProjQ1==ProjQ2) && (ProjQ1==ProjQ3)) {NewProjCode +=2; ProjDeltaHasCreated=true;} |
---|
479 | else if(projectile->GetDefinition()->GetPDGiIsospin() == 3)// Projectile was Delta |
---|
480 | { if(G4UniformRand() > DeltaProbAtQuarkExchange) |
---|
481 | {NewProjCode +=2; ProjDeltaHasCreated=true;} |
---|
482 | else {NewProjCode +=0; ProjDeltaHasCreated=false;} |
---|
483 | } |
---|
484 | else // Projectile was Nucleon |
---|
485 | { |
---|
486 | if((G4UniformRand() < DeltaProbAtQuarkExchange) && (SqrtS > DeltaMass+M0target)) |
---|
487 | {NewProjCode +=2; ProjDeltaHasCreated=true;} |
---|
488 | else {NewProjCode +=0; ProjDeltaHasCreated=false;} |
---|
489 | } |
---|
490 | |
---|
491 | NewTargCode = NewNucleonId(TargQ1, TargQ2, TargQ3); // ***************************** |
---|
492 | |
---|
493 | if((TargQ1==TargQ2) && (TargQ1==TargQ3)) {NewTargCode +=2; TargDeltaHasCreated=true;} |
---|
494 | else if(target->GetDefinition()->GetPDGiIsospin() == 3) // Target was Delta |
---|
495 | { if(G4UniformRand() > DeltaProbAtQuarkExchange) |
---|
496 | {NewTargCode +=2; TargDeltaHasCreated=true;} |
---|
497 | else {NewTargCode +=0; TargDeltaHasCreated=false;} |
---|
498 | } |
---|
499 | else // Target was Nucleon |
---|
500 | { |
---|
501 | if((G4UniformRand() < DeltaProbAtQuarkExchange) && (SqrtS > M0projectile+DeltaMass)) |
---|
502 | {NewTargCode +=2; TargDeltaHasCreated=true;} |
---|
503 | else {NewTargCode +=0; TargDeltaHasCreated=false;} |
---|
504 | } |
---|
505 | |
---|
506 | if((absProjectilePDGcode == NewProjCode) && (absTargetPDGcode == NewTargCode)) |
---|
507 | { // Nothing was changed! It is not right!? |
---|
508 | } |
---|
509 | // Forming baryons -------------------------------------------------- |
---|
510 | |
---|
511 | // if( ProjDeltaHasCreated && TargDeltaHasCreated ) {StandardExcitation = true;} |
---|
512 | |
---|
513 | //G4cout<<"New PDG "<<NewProjCode<<" "<<NewTargCode<<G4endl; |
---|
514 | //G4int Uzhi; G4cin>>Uzhi; |
---|
515 | } // End of if projectile is baryon --------------------------- |
---|
516 | |
---|
517 | |
---|
518 | // If we assume that final state hadrons after the charge exchange will be |
---|
519 | // in the ground states, we have to put ---------------------------------- |
---|
520 | if(M0projectile < |
---|
521 | (G4ParticleTable::GetParticleTable()->FindParticle(NewProjCode))->GetPDGMass()) |
---|
522 | { |
---|
523 | M0projectile= |
---|
524 | (G4ParticleTable::GetParticleTable()->FindParticle(NewProjCode))->GetPDGMass(); |
---|
525 | M0projectile2 = M0projectile * M0projectile; |
---|
526 | } |
---|
527 | |
---|
528 | if(M0target < |
---|
529 | (G4ParticleTable::GetParticleTable()->FindParticle(NewTargCode))->GetPDGMass()) |
---|
530 | { |
---|
531 | M0target= |
---|
532 | (G4ParticleTable::GetParticleTable()->FindParticle(NewTargCode))->GetPDGMass(); |
---|
533 | M0target2 = M0target * M0target; |
---|
534 | } |
---|
535 | |
---|
536 | PZcms2=(S*S+M0projectile2*M0projectile2+M0target2*M0target2- |
---|
537 | 2*S*M0projectile2 - 2*S*M0target2 - 2*M0projectile2*M0target2) |
---|
538 | /4./S; |
---|
539 | //G4cout<<"New Masses "<<M0projectile<<" "<<M0target<<G4endl; |
---|
540 | //G4cout<<"PZcms2 "<<PZcms2<<G4endl; |
---|
541 | |
---|
542 | if(PZcms2 < 0) {return false;} // It can be if energy is not sufficient for Delta |
---|
543 | //---------------------------------------------------------- |
---|
544 | projectile->SetDefinition( |
---|
545 | G4ParticleTable::GetParticleTable()->FindParticle(NewProjCode)); |
---|
546 | |
---|
547 | target->SetDefinition( |
---|
548 | G4ParticleTable::GetParticleTable()->FindParticle(NewTargCode)); |
---|
549 | //---------------------------------------------------------- |
---|
550 | PZcms = std::sqrt(PZcms2); |
---|
551 | |
---|
552 | Pprojectile.setPz( PZcms); |
---|
553 | Pprojectile.setE(std::sqrt(M0projectile2+PZcms2)); |
---|
554 | |
---|
555 | Ptarget.setPz( -PZcms); |
---|
556 | Ptarget.setE(std::sqrt(M0target2+PZcms2)); |
---|
557 | |
---|
558 | //G4cout<<"Proj "<<Pprojectile<<" "<<Pprojectile.mag()<<G4endl; |
---|
559 | //G4cout<<"Targ "<<Ptarget<<" "<<Ptarget.mag()<<G4endl; |
---|
560 | |
---|
561 | // if(!StandardExcitation) |
---|
562 | { |
---|
563 | Pprojectile.transform(toLab); |
---|
564 | Ptarget.transform(toLab); |
---|
565 | |
---|
566 | projectile->SetTimeOfCreation(target->GetTimeOfCreation()); |
---|
567 | projectile->SetPosition(target->GetPosition()); |
---|
568 | |
---|
569 | projectile->Set4Momentum(Pprojectile); |
---|
570 | target->Set4Momentum(Ptarget); |
---|
571 | |
---|
572 | G4bool Result= theElastic->ElasticScattering (projectile,target,theParameters); |
---|
573 | //G4cout<<"1 Delta result "<<Result<<"**********"<<G4endl; |
---|
574 | return Result; |
---|
575 | } |
---|
576 | /* |
---|
577 | else |
---|
578 | { |
---|
579 | if(M0projectile > ProjectileDiffStateMinMass) |
---|
580 | { ProjectileDiffStateMinMass +=200.*MeV; ProjectileNonDiffStateMinMass +=200.*MeV;} |
---|
581 | |
---|
582 | if(M0target > TargetDiffStateMinMass) |
---|
583 | { TargetDiffStateMinMass +=200.*MeV; TargetNonDiffStateMinMass +=200.*MeV;} |
---|
584 | |
---|
585 | ProbOfDiffraction = 1.; |
---|
586 | ProbProjectileDiffraction =0.5; |
---|
587 | ProbTargetDiffraction =0.5; |
---|
588 | G4cout<<"Exc DD "<<M0projectile<<" "<<M0target<<" --------------------"<<G4endl; |
---|
589 | // After that standard FTF excitation |
---|
590 | } |
---|
591 | */ |
---|
592 | } // End of charge exchange part ------------------------------ |
---|
593 | |
---|
594 | // ------------------------------------------------------------------ |
---|
595 | // G4double ProbOfDiffraction=ProbProjectileDiffraction + |
---|
596 | // ProbTargetDiffraction; |
---|
597 | //G4cout<<ProbOfDiffraction<<" "<<ProbProjectileDiffraction<<" "<<ProbTargetDiffraction<<G4endl; |
---|
598 | //G4int Uzhi; G4cin>>Uzhi; |
---|
599 | if(ProbOfDiffraction!=0.) |
---|
600 | { |
---|
601 | ProbProjectileDiffraction/=ProbOfDiffraction; |
---|
602 | } |
---|
603 | else |
---|
604 | { |
---|
605 | ProbProjectileDiffraction=0.; |
---|
606 | } |
---|
607 | |
---|
608 | //ProbOfDiffraction=1.; //0.5; // Vova |
---|
609 | |
---|
610 | G4double ProjectileDiffStateMinMass2 = ProjectileDiffStateMinMass * |
---|
611 | ProjectileDiffStateMinMass; |
---|
612 | G4double ProjectileNonDiffStateMinMass2 = ProjectileNonDiffStateMinMass * |
---|
613 | ProjectileNonDiffStateMinMass; |
---|
614 | |
---|
615 | G4double TargetDiffStateMinMass2 = TargetDiffStateMinMass * |
---|
616 | TargetDiffStateMinMass; |
---|
617 | G4double TargetNonDiffStateMinMass2 = TargetNonDiffStateMinMass * |
---|
618 | TargetNonDiffStateMinMass; |
---|
619 | |
---|
620 | |
---|
621 | G4double Pt2; |
---|
622 | G4double ProjMassT2, ProjMassT; |
---|
623 | G4double TargMassT2, TargMassT; |
---|
624 | G4double PMinusMin, PMinusMax; |
---|
625 | // G4double PPlusMin , PPlusMax; |
---|
626 | G4double TPlusMin , TPlusMax; |
---|
627 | G4double PMinusNew, PPlusNew, TPlusNew, TMinusNew; |
---|
628 | |
---|
629 | G4LorentzVector Qmomentum; |
---|
630 | G4double Qminus, Qplus; |
---|
631 | |
---|
632 | G4int whilecount=0; |
---|
633 | // Choose a process --------------------------- |
---|
634 | |
---|
635 | if(G4UniformRand() < ProbOfDiffraction) |
---|
636 | { |
---|
637 | if(G4UniformRand() < ProbProjectileDiffraction) |
---|
638 | { //-------- projectile diffraction --------------- |
---|
639 | //G4cout<<"Proj difr"<<G4endl; |
---|
640 | do { |
---|
641 | // Generate pt |
---|
642 | // if (whilecount++ >= 500 && (whilecount%100)==0) |
---|
643 | // G4cout << "G4DiffractiveExcitation::ExciteParticipants possibly looping" |
---|
644 | // << ", loop count/ maxPtSquare : " |
---|
645 | // << whilecount << " / " << maxPtSquare << G4endl; |
---|
646 | if (whilecount > 1000 ) |
---|
647 | { |
---|
648 | Qmomentum=G4LorentzVector(0.,0.,0.,0.); |
---|
649 | target->SetStatus(2); return false; // Ignore this interaction |
---|
650 | }; |
---|
651 | // --------------- Check that the interaction is possible ----------- |
---|
652 | ProjMassT2=ProjectileDiffStateMinMass2; |
---|
653 | ProjMassT =ProjectileDiffStateMinMass; |
---|
654 | |
---|
655 | TargMassT2=M0target2; |
---|
656 | TargMassT =M0target; |
---|
657 | |
---|
658 | PZcms2=(S*S + ProjMassT2*ProjMassT2 + TargMassT2*TargMassT2- |
---|
659 | 2.*S*ProjMassT2-2.*S*TargMassT2-2.*ProjMassT2*TargMassT2) |
---|
660 | /4./S; |
---|
661 | //G4cout<<"PZcms2 < 0 false "<<PZcms2<<G4endl; |
---|
662 | if(PZcms2 < 0 ) |
---|
663 | { |
---|
664 | target->SetStatus(2); |
---|
665 | return false; |
---|
666 | } |
---|
667 | maxPtSquare=PZcms2; |
---|
668 | |
---|
669 | Qmomentum=G4LorentzVector(GaussianPt(AveragePt2,maxPtSquare),0); |
---|
670 | Pt2=G4ThreeVector(Qmomentum.vect()).mag2(); |
---|
671 | |
---|
672 | ProjMassT2=ProjectileDiffStateMinMass2+Pt2; |
---|
673 | ProjMassT =std::sqrt(ProjMassT2); |
---|
674 | |
---|
675 | TargMassT2=M0target2+Pt2; |
---|
676 | TargMassT =std::sqrt(TargMassT2); |
---|
677 | |
---|
678 | PZcms2=(S*S + ProjMassT2*ProjMassT2 + TargMassT2*TargMassT2- |
---|
679 | 2.*S*ProjMassT2-2.*S*TargMassT2-2.*ProjMassT2*TargMassT2) |
---|
680 | /4./S; |
---|
681 | |
---|
682 | if(PZcms2 < 0 ) continue; |
---|
683 | PZcms =std::sqrt(PZcms2); |
---|
684 | |
---|
685 | PMinusMin=std::sqrt(ProjMassT2+PZcms2)-PZcms; |
---|
686 | PMinusMax=SqrtS-TargMassT; |
---|
687 | |
---|
688 | PMinusNew=ChooseP(PMinusMin, PMinusMax); |
---|
689 | // PMinusNew=1./sqrt(1./PMinusMin-G4UniformRand()*(1./PMinusMin-1./PMinusMax)); |
---|
690 | |
---|
691 | TMinusNew=SqrtS-PMinusNew; |
---|
692 | Qminus=Ptarget.minus()-TMinusNew; |
---|
693 | TPlusNew=TargMassT2/TMinusNew; |
---|
694 | Qplus=Ptarget.plus()-TPlusNew; |
---|
695 | |
---|
696 | Qmomentum.setPz( (Qplus-Qminus)/2 ); |
---|
697 | Qmomentum.setE( (Qplus+Qminus)/2 ); |
---|
698 | } while ( |
---|
699 | ((Pprojectile+Qmomentum).mag2() < ProjectileDiffStateMinMass2) || //No without excitation |
---|
700 | ((Ptarget -Qmomentum).mag2() < M0target2 )); |
---|
701 | } |
---|
702 | else |
---|
703 | { // -------------- Target diffraction ---------------- |
---|
704 | do { |
---|
705 | //G4cout<<"Targ difr"<<G4endl; |
---|
706 | // Generate pt |
---|
707 | // if (whilecount++ >= 500 && (whilecount%100)==0) |
---|
708 | // G4cout << "G4DiffractiveExcitation::ExciteParticipants possibly looping" |
---|
709 | // << ", loop count/ maxPtSquare : " |
---|
710 | // << whilecount << " / " << maxPtSquare << G4endl; |
---|
711 | if (whilecount > 1000 ) |
---|
712 | { |
---|
713 | Qmomentum=G4LorentzVector(0.,0.,0.,0.); |
---|
714 | target->SetStatus(2); return false; // Ignore this interaction |
---|
715 | }; |
---|
716 | // --------------- Check that the interaction is possible ----------- |
---|
717 | ProjMassT2=M0projectile2; |
---|
718 | ProjMassT =M0projectile; |
---|
719 | |
---|
720 | TargMassT2=TargetDiffStateMinMass2; |
---|
721 | TargMassT =TargetDiffStateMinMass; |
---|
722 | |
---|
723 | PZcms2=(S*S + ProjMassT2*ProjMassT2 + TargMassT2*TargMassT2- |
---|
724 | 2.*S*ProjMassT2-2.*S*TargMassT2-2.*ProjMassT2*TargMassT2) |
---|
725 | /4./S; |
---|
726 | |
---|
727 | if(PZcms2 < 0 ) |
---|
728 | { |
---|
729 | target->SetStatus(2); |
---|
730 | return false; |
---|
731 | } |
---|
732 | maxPtSquare=PZcms2; |
---|
733 | |
---|
734 | Qmomentum=G4LorentzVector(GaussianPt(AveragePt2,maxPtSquare),0); |
---|
735 | Pt2=G4ThreeVector(Qmomentum.vect()).mag2(); |
---|
736 | |
---|
737 | ProjMassT2=M0projectile2+Pt2; |
---|
738 | ProjMassT =std::sqrt(ProjMassT2); |
---|
739 | |
---|
740 | TargMassT2=TargetDiffStateMinMass2+Pt2; |
---|
741 | TargMassT =std::sqrt(TargMassT2); |
---|
742 | |
---|
743 | PZcms2=(S*S + ProjMassT2*ProjMassT2 + TargMassT2*TargMassT2- |
---|
744 | 2.*S*ProjMassT2-2.*S*TargMassT2-2.*ProjMassT2*TargMassT2) |
---|
745 | /4./S; |
---|
746 | |
---|
747 | if(PZcms2 < 0 ) continue; |
---|
748 | PZcms =std::sqrt(PZcms2); |
---|
749 | |
---|
750 | TPlusMin=std::sqrt(TargMassT2+PZcms2)-PZcms; |
---|
751 | TPlusMax=SqrtS-ProjMassT; |
---|
752 | |
---|
753 | TPlusNew=ChooseP(TPlusMin, TPlusMax); |
---|
754 | |
---|
755 | //TPlusNew=TPlusMax; |
---|
756 | |
---|
757 | PPlusNew=SqrtS-TPlusNew; |
---|
758 | Qplus=PPlusNew-Pprojectile.plus(); |
---|
759 | PMinusNew=ProjMassT2/PPlusNew; |
---|
760 | Qminus=PMinusNew-Pprojectile.minus(); |
---|
761 | |
---|
762 | Qmomentum.setPz( (Qplus-Qminus)/2 ); |
---|
763 | Qmomentum.setE( (Qplus+Qminus)/2 ); |
---|
764 | |
---|
765 | } while ( |
---|
766 | ((Pprojectile+Qmomentum).mag2() < M0projectile2 ) || //No without excitation |
---|
767 | ((Ptarget -Qmomentum).mag2() < TargetDiffStateMinMass2)); |
---|
768 | } |
---|
769 | } |
---|
770 | else //----------- Non-diffraction process ------------ |
---|
771 | { |
---|
772 | //G4cout<<"Non difr"<<G4endl; |
---|
773 | do { |
---|
774 | // Generate pt |
---|
775 | // if (whilecount++ >= 500 && (whilecount%100)==0) |
---|
776 | // G4cout << "G4DiffractiveExcitation::ExciteParticipants possibly looping" |
---|
777 | // << ", loop count/ maxPtSquare : " |
---|
778 | // << whilecount << " / " << maxPtSquare << G4endl; |
---|
779 | if (whilecount > 1000 ) |
---|
780 | { |
---|
781 | Qmomentum=G4LorentzVector(0.,0.,0.,0.); |
---|
782 | target->SetStatus(2); return false; // Ignore this interaction |
---|
783 | }; |
---|
784 | // --------------- Check that the interaction is possible ----------- |
---|
785 | ProjMassT2=ProjectileNonDiffStateMinMass2; |
---|
786 | ProjMassT =ProjectileNonDiffStateMinMass; |
---|
787 | |
---|
788 | TargMassT2=TargetNonDiffStateMinMass2; |
---|
789 | TargMassT =TargetNonDiffStateMinMass; |
---|
790 | |
---|
791 | PZcms2=(S*S + ProjMassT2*ProjMassT2 + TargMassT2*TargMassT2- |
---|
792 | 2.*S*ProjMassT2-2.*S*TargMassT2-2.*ProjMassT2*TargMassT2) |
---|
793 | /4./S; |
---|
794 | |
---|
795 | if(PZcms2 < 0 ) |
---|
796 | { |
---|
797 | target->SetStatus(2); |
---|
798 | return false; |
---|
799 | } |
---|
800 | maxPtSquare=PZcms2; |
---|
801 | Qmomentum=G4LorentzVector(GaussianPt(AveragePt2,maxPtSquare),0); |
---|
802 | Pt2=G4ThreeVector(Qmomentum.vect()).mag2(); |
---|
803 | |
---|
804 | ProjMassT2=ProjectileNonDiffStateMinMass2+Pt2; |
---|
805 | ProjMassT =std::sqrt(ProjMassT2); |
---|
806 | |
---|
807 | TargMassT2=TargetNonDiffStateMinMass2+Pt2; |
---|
808 | TargMassT =std::sqrt(TargMassT2); |
---|
809 | |
---|
810 | PZcms2=(S*S + ProjMassT2*ProjMassT2 + TargMassT2*TargMassT2- |
---|
811 | 2.*S*ProjMassT2-2.*S*TargMassT2-2.*ProjMassT2*TargMassT2) |
---|
812 | /4./S; |
---|
813 | |
---|
814 | if(PZcms2 < 0 ) continue; |
---|
815 | PZcms =std::sqrt(PZcms2); |
---|
816 | |
---|
817 | PMinusMin=std::sqrt(ProjMassT2+PZcms2)-PZcms; |
---|
818 | PMinusMax=SqrtS-TargMassT; |
---|
819 | |
---|
820 | PMinusNew=ChooseP(PMinusMin, PMinusMax); |
---|
821 | |
---|
822 | Qminus=PMinusNew-Pprojectile.minus(); |
---|
823 | |
---|
824 | TPlusMin=std::sqrt(TargMassT2+PZcms2)-PZcms; |
---|
825 | // TPlusMax=SqrtS-PMinusNew; |
---|
826 | TPlusMax=SqrtS-ProjMassT; |
---|
827 | |
---|
828 | TPlusNew=ChooseP(TPlusMin, TPlusMax); |
---|
829 | |
---|
830 | Qplus=-(TPlusNew-Ptarget.plus()); |
---|
831 | |
---|
832 | Qmomentum.setPz( (Qplus-Qminus)/2 ); |
---|
833 | Qmomentum.setE( (Qplus+Qminus)/2 ); |
---|
834 | |
---|
835 | } while ( |
---|
836 | ((Pprojectile+Qmomentum).mag2() < ProjectileNonDiffStateMinMass2) || //No double Diffraction |
---|
837 | ((Ptarget -Qmomentum).mag2() < TargetNonDiffStateMinMass2 )); |
---|
838 | } |
---|
839 | |
---|
840 | Pprojectile += Qmomentum; |
---|
841 | Ptarget -= Qmomentum; |
---|
842 | |
---|
843 | //G4cout<<"Masses "<<Pprojectile.mag()<<" "<<Ptarget.mag()<<G4endl; |
---|
844 | //G4int Uzhi; G4cin>>Uzhi; |
---|
845 | |
---|
846 | // Transform back and update SplitableHadron Participant. |
---|
847 | Pprojectile.transform(toLab); |
---|
848 | Ptarget.transform(toLab); |
---|
849 | |
---|
850 | // Calculation of the creation time --------------------- |
---|
851 | projectile->SetTimeOfCreation(target->GetTimeOfCreation()); |
---|
852 | projectile->SetPosition(target->GetPosition()); |
---|
853 | // Creation time and position of target nucleon were determined at |
---|
854 | // ReggeonCascade() of G4FTFModel |
---|
855 | // ------------------------------------------------------ |
---|
856 | |
---|
857 | projectile->Set4Momentum(Pprojectile); |
---|
858 | target->Set4Momentum(Ptarget); |
---|
859 | |
---|
860 | projectile->IncrementCollisionCount(1); |
---|
861 | target->IncrementCollisionCount(1); |
---|
862 | |
---|
863 | return true; |
---|
864 | } |
---|
865 | |
---|
866 | // --------------------------------------------------------------------- |
---|
867 | //G4ExcitedString * G4DiffractiveExcitation:: |
---|
868 | // String(G4VSplitableHadron * hadron, G4bool isProjectile) const |
---|
869 | void G4DiffractiveExcitation::CreateStrings(G4VSplitableHadron * hadron, |
---|
870 | G4bool isProjectile, |
---|
871 | G4ExcitedString * &FirstString, |
---|
872 | G4ExcitedString * &SecondString, |
---|
873 | G4FTFParameters *theParameters) const |
---|
874 | { |
---|
875 | hadron->SplitUp(); |
---|
876 | G4Parton *start= hadron->GetNextParton(); |
---|
877 | if ( start==NULL) |
---|
878 | { G4cout << " G4FTFModel::String() Error:No start parton found"<< G4endl; |
---|
879 | FirstString=0; SecondString=0; |
---|
880 | return; |
---|
881 | } |
---|
882 | G4Parton *end = hadron->GetNextParton(); |
---|
883 | if ( end==NULL) |
---|
884 | { G4cout << " G4FTFModel::String() Error:No end parton found"<< G4endl; |
---|
885 | FirstString=0; SecondString=0; |
---|
886 | return; |
---|
887 | } |
---|
888 | G4LorentzVector Phadron=hadron->Get4Momentum(); |
---|
889 | /* |
---|
890 | G4cout<<"Create strings had "<<hadron->GetDefinition()->GetParticleName()<<" "<<Phadron<<" "<<Phadron.mag()<<G4endl; |
---|
891 | G4cout<<"isProjectile "<<isProjectile<<G4endl; |
---|
892 | G4cout<<"start Q "<<start->GetDefinition()->GetPDGEncoding()<<G4endl; |
---|
893 | G4cout<<"end Q "<<end->GetDefinition()->GetPDGEncoding()<<G4endl; |
---|
894 | */ |
---|
895 | G4LorentzVector Pstart(0.,0.,0.,0.); |
---|
896 | G4LorentzVector Pend(0.,0.,0.,0.); |
---|
897 | G4LorentzVector Pkink(0.,0.,0.,0.); |
---|
898 | G4LorentzVector PkinkQ1(0.,0.,0.,0.); |
---|
899 | G4LorentzVector PkinkQ2(0.,0.,0.,0.); |
---|
900 | |
---|
901 | G4int PDGcode_startQ = std::abs(start->GetDefinition()->GetPDGEncoding()); |
---|
902 | G4int PDGcode_endQ = std::abs( end->GetDefinition()->GetPDGEncoding()); |
---|
903 | |
---|
904 | //-------------------------------------------------------------------------------- |
---|
905 | G4double Wmin(0.); |
---|
906 | if(isProjectile) |
---|
907 | { |
---|
908 | Wmin=theParameters->GetProjMinDiffMass(); |
---|
909 | } else |
---|
910 | { |
---|
911 | Wmin=theParameters->GetTarMinDiffMass(); |
---|
912 | } // end of if(isProjectile) |
---|
913 | |
---|
914 | G4double W = hadron->Get4Momentum().mag(); |
---|
915 | G4double W2=W*W; |
---|
916 | //G4cout<<"W Wmin "<<W<<" "<<Wmin<<G4endl; |
---|
917 | G4double Pt(0.), x1(0.), x2(0.), x3(0.); |
---|
918 | G4bool Kink=false; |
---|
919 | |
---|
920 | if(W > Wmin) |
---|
921 | { // Kink is possible |
---|
922 | G4double Pt2kink=theParameters->GetPt2Kink(); |
---|
923 | Pt = std::sqrt(Pt2kink*(std::pow(W2/16./Pt2kink+1.,G4UniformRand()) - 1.)); |
---|
924 | // Pt=0.; |
---|
925 | //G4cout<<"Pt2kink Pt Pt2 "<<Pt2kink<<" "<<Pt<<" "<<Pt*Pt<<G4endl; |
---|
926 | if(Pt > 500.*MeV) |
---|
927 | { |
---|
928 | G4double Ymax = std::log(W/2./Pt + std::sqrt(W2/4./Pt/Pt - 1.)); |
---|
929 | G4double Y=Ymax*(1.- 2.*G4UniformRand()); |
---|
930 | //G4cout<<"Ymax Y "<<Ymax<<" "<<Y<<G4endl; |
---|
931 | x1=1.-Pt/W*std::exp( Y); |
---|
932 | x3=1.-Pt/W*std::exp(-Y); |
---|
933 | x2=2.-x1-x3; |
---|
934 | //G4cout<<"X1 X2 X3 "<<x1<<" "<<x2<<" "<<x3<<G4endl; |
---|
935 | G4double Mass_startQ = 650.*MeV; |
---|
936 | if(PDGcode_startQ < 3) Mass_startQ = 325.*MeV; |
---|
937 | if(PDGcode_startQ == 3) Mass_startQ = 500.*MeV; |
---|
938 | if(PDGcode_startQ == 4) Mass_startQ = 1600.*MeV; |
---|
939 | |
---|
940 | G4double Mass_endQ = 650.*MeV; |
---|
941 | if(PDGcode_endQ < 3) Mass_endQ = 325.*MeV; |
---|
942 | if(PDGcode_endQ == 3) Mass_endQ = 500.*MeV; |
---|
943 | if(PDGcode_endQ == 4) Mass_endQ = 1600.*MeV; |
---|
944 | |
---|
945 | G4double P2_1=W2*x1*x1/4.-Mass_endQ *Mass_endQ; |
---|
946 | G4double P2_3=W2*x3*x3/4.-Mass_startQ*Mass_startQ; |
---|
947 | |
---|
948 | G4double P2_2=sqr((2.-x1-x3)*W/2.); |
---|
949 | //G4cout<<"P2_1 P2_2 P2_3 "<<P2_1<<" "<<P2_2<<" "<<P2_3<<G4endl; |
---|
950 | if((P2_1 < 0.) || (P2_3 <0.)) |
---|
951 | { Kink=false;} |
---|
952 | else |
---|
953 | { |
---|
954 | G4double P_1=std::sqrt(P2_1); |
---|
955 | G4double P_2=std::sqrt(P2_2); |
---|
956 | G4double P_3=std::sqrt(P2_3); |
---|
957 | //G4cout<<"P_1 P_2 P_3 "<<P_1<<" "<<P_2<<" "<<P_3<<G4endl; |
---|
958 | G4double CosT12=(P2_3-P2_1-P2_2)/(2.*P_1*P_2); |
---|
959 | G4double CosT13=(P2_2-P2_1-P2_3)/(2.*P_1*P_3); |
---|
960 | //G4cout<<"CosT12 CosT13 "<<CosT12<<" "<<CosT13<<" "<<std::acos(CosT12)*180./3.14159<<" "<<std::acos(CosT13)*180./3.14159<<G4endl; |
---|
961 | if((std::abs(CosT12) >1.) || (std::abs(CosT13) > 1.)) |
---|
962 | { Kink=false;} |
---|
963 | else |
---|
964 | { |
---|
965 | Kink=true; |
---|
966 | Pstart.setPx(-Pt); Pstart.setPy(0.); Pstart.setPz(P_3*CosT13); |
---|
967 | Pend.setPx( 0.); Pend.setPy( 0.); Pend.setPz( P_1); |
---|
968 | Pkink.setPx( Pt); Pkink.setPy( 0.); Pkink.setPz( P_2*CosT12); |
---|
969 | Pstart.setE(x3*W/2.); |
---|
970 | Pkink.setE(Pkink.vect().mag()); |
---|
971 | Pend.setE(x1*W/2.); |
---|
972 | |
---|
973 | G4double XkQ=GetQuarkFractionOfKink(0.,1.); |
---|
974 | if(Pkink.getZ() > 0.) |
---|
975 | { |
---|
976 | if(XkQ > 0.5) {PkinkQ1=XkQ*Pkink;} else {PkinkQ1=(1.-XkQ)*Pkink;} |
---|
977 | } else { |
---|
978 | if(XkQ > 0.5) {PkinkQ1=(1.-XkQ)*Pkink;} else {PkinkQ1=XkQ*Pkink;} |
---|
979 | } |
---|
980 | |
---|
981 | PkinkQ2=Pkink - PkinkQ1; |
---|
982 | //------------------------- Minimizing Pt1^2+Pt3^2 ------------------------------ |
---|
983 | /* |
---|
984 | G4cout<<"Pstart "<<Pstart<<G4endl; |
---|
985 | G4cout<<"Pkink "<<Pkink <<G4endl; |
---|
986 | G4cout<<"Pkink1 "<<PkinkQ1<<G4endl; |
---|
987 | G4cout<<"Pkink2 "<<PkinkQ2<<G4endl; |
---|
988 | G4cout<<"Pend "<<Pend <<G4endl; |
---|
989 | */ |
---|
990 | G4double Cos2Psi=(sqr(x1) -sqr(x3)+2.*sqr(x3*CosT13))/ |
---|
991 | std::sqrt(sqr(sqr(x1)-sqr(x3)) + sqr(2.*x1*x3*CosT13)); |
---|
992 | G4double Psi=std::acos(Cos2Psi); |
---|
993 | //G4cout<<"Psi "<<Psi<<" "<<Psi*180./twopi<<G4endl; |
---|
994 | |
---|
995 | G4LorentzRotation Rotate; |
---|
996 | if(isProjectile) {Rotate.rotateY(Psi);} |
---|
997 | else {Rotate.rotateY(pi-Psi);} |
---|
998 | Rotate.rotateZ(twopi*G4UniformRand()); |
---|
999 | |
---|
1000 | //G4cout<<"Rotate"<<G4endl; |
---|
1001 | |
---|
1002 | Pstart*=Rotate; |
---|
1003 | Pkink*=Rotate; |
---|
1004 | PkinkQ1*=Rotate; |
---|
1005 | PkinkQ2*=Rotate; |
---|
1006 | Pend*=Rotate; |
---|
1007 | /* |
---|
1008 | G4cout<<"Pstart "<<Pstart<<G4endl; |
---|
1009 | G4cout<<"Pkink1 "<<PkinkQ1 <<G4endl; |
---|
1010 | G4cout<<"Pkink2 "<<PkinkQ2 <<G4endl; |
---|
1011 | G4cout<<"Pend "<<Pend <<G4endl; |
---|
1012 | */ |
---|
1013 | } |
---|
1014 | } // end of if((P2_1 < 0.) || (P2_3 <0.)) |
---|
1015 | } // end of if(Pt > 500.*MeV) |
---|
1016 | } // end of if(W > Wmin) Check for a kink |
---|
1017 | |
---|
1018 | //-------------------------------------------------------------------------------- |
---|
1019 | |
---|
1020 | //G4cout<<"Kink "<<Kink<<G4endl; |
---|
1021 | |
---|
1022 | if(Kink) |
---|
1023 | { // Kink is possible |
---|
1024 | std::vector<G4double> QuarkProbabilitiesAtGluonSplitUp = |
---|
1025 | theParameters->GetQuarkProbabilitiesAtGluonSplitUp(); |
---|
1026 | |
---|
1027 | G4int QuarkInGluon(1); G4double Ksi=G4UniformRand(); |
---|
1028 | for(unsigned int Iq=0; Iq <3; Iq++) |
---|
1029 | { |
---|
1030 | //G4cout<<Iq<<" "<<QuarkProbabilitiesAtGluonSplitUp[Iq]<<G4endl; |
---|
1031 | if(Ksi > QuarkProbabilitiesAtGluonSplitUp[Iq]) QuarkInGluon++;} |
---|
1032 | |
---|
1033 | //G4cout<<"Gquark "<<QuarkInGluon<<G4endl; |
---|
1034 | G4Parton * Gquark = new G4Parton(QuarkInGluon); |
---|
1035 | G4Parton * Ganti_quark = new G4Parton(-QuarkInGluon); |
---|
1036 | /* |
---|
1037 | G4cout<<Gquark->GetDefinition()->GetParticleName()<<" "<<Gquark->GetDefinition()->GetPDGEncoding()<<" "<<Gquark->GetDefinition()->GetPDGMass()<<G4endl; |
---|
1038 | G4cout<<Ganti_quark->GetDefinition()->GetParticleName()<<" "<<Ganti_quark->GetDefinition()->GetPDGEncoding()<<" "<<Ganti_quark->GetDefinition()->GetPDGMass()<<G4endl; |
---|
1039 | */ |
---|
1040 | |
---|
1041 | //G4int Uzhi; G4cin>>Uzhi; |
---|
1042 | |
---|
1043 | //------------------------------------------------------------------------------- |
---|
1044 | /* |
---|
1045 | DefineMomentumInZ(G4double aLightConeMomentum, G4bool aDirection); |
---|
1046 | void Set4Momentum(const G4LorentzVector & aMomentum); |
---|
1047 | G4int PDGencoding; |
---|
1048 | G4ParticleDefinition * theDefinition; |
---|
1049 | G4LorentzVector theMomentum; |
---|
1050 | G4ThreeVector thePosition; |
---|
1051 | |
---|
1052 | G4int theColour; |
---|
1053 | G4double theIsoSpinZ; |
---|
1054 | G4double theSpinZ; |
---|
1055 | |
---|
1056 | G4double theX; |
---|
1057 | */ |
---|
1058 | //------------------------------------------------------------------------------- |
---|
1059 | |
---|
1060 | //G4cout<<"Phadron "<<Phadron<<" mass "<<Phadron.mag()<<G4endl; |
---|
1061 | G4LorentzRotation toCMS(-1*Phadron.boostVector()); |
---|
1062 | //G4cout<<"To lab"<<G4endl; |
---|
1063 | G4LorentzRotation toLab(toCMS.inverse()); |
---|
1064 | |
---|
1065 | Pstart.transform(toLab); start->Set4Momentum(Pstart); |
---|
1066 | PkinkQ1.transform(toLab); |
---|
1067 | PkinkQ2.transform(toLab); |
---|
1068 | Pend.transform(toLab); end->Set4Momentum(Pend); |
---|
1069 | /* |
---|
1070 | G4cout<<"Pstart "<<start->GetDefinition()->GetPDGEncoding()<<Pstart<<G4endl; |
---|
1071 | G4cout<<"Pkink1 "<<PkinkQ1 <<G4endl; |
---|
1072 | G4cout<<"Pkink2 "<<PkinkQ2 <<G4endl; |
---|
1073 | G4cout<<"Pend "<<end->GetDefinition()->GetPDGEncoding()<<Pend <<G4endl; |
---|
1074 | */ |
---|
1075 | // !!! G4ExcitedString * FirstString(0); G4ExcitedString * SecondString(0); |
---|
1076 | G4int absPDGcode=std::abs(hadron->GetDefinition()->GetPDGEncoding()); |
---|
1077 | |
---|
1078 | //G4cout<<"absPDGcode "<<absPDGcode<<G4endl; |
---|
1079 | |
---|
1080 | if(absPDGcode < 1000) |
---|
1081 | { // meson |
---|
1082 | if ( isProjectile ) |
---|
1083 | { // Projectile |
---|
1084 | if(end->GetDefinition()->GetPDGEncoding() > 0 ) // A quark on the end |
---|
1085 | { // Quark on the end |
---|
1086 | FirstString = new G4ExcitedString(end ,Ganti_quark, +1); |
---|
1087 | SecondString= new G4ExcitedString(Gquark,start ,+1); |
---|
1088 | Ganti_quark->Set4Momentum(PkinkQ1); |
---|
1089 | Gquark->Set4Momentum(PkinkQ2); |
---|
1090 | /* |
---|
1091 | G4cout<<" Proj Meson end Q"<<G4endl; |
---|
1092 | G4cout<<"First string ============ "<<G4endl; |
---|
1093 | G4cout<<"end Q "<<end->GetDefinition()->GetPDGEncoding()<<" "<<end->Get4Momentum()<<G4endl; |
---|
1094 | G4cout<<"G antiQ"<<Ganti_quark->GetDefinition()->GetPDGEncoding()<<" "<<Ganti_quark->Get4Momentum()<<G4endl; |
---|
1095 | G4cout<<"Sum P "<<(Ganti_quark->Get4Momentum()+end->Get4Momentum())<<G4endl; |
---|
1096 | G4cout<<"Secondstring ============ "<<G4endl; |
---|
1097 | G4cout<<"G Q "<<Gquark->GetDefinition()->GetPDGEncoding()<<" "<<Gquark->Get4Momentum()<<G4endl; |
---|
1098 | G4cout<<"startQ "<<start->GetDefinition()->GetPDGEncoding()<<" "<<start->Get4Momentum()<<G4endl; |
---|
1099 | |
---|
1100 | G4cout<<"Sum P "<<(Gquark->Get4Momentum()+start->Get4Momentum())<<G4endl; |
---|
1101 | */ |
---|
1102 | } else |
---|
1103 | { // Anti_Quark on the end |
---|
1104 | FirstString = new G4ExcitedString(end ,Gquark, +1); |
---|
1105 | SecondString= new G4ExcitedString(Ganti_quark,start ,+1); |
---|
1106 | Gquark->Set4Momentum(PkinkQ1); |
---|
1107 | Ganti_quark->Set4Momentum(PkinkQ2); |
---|
1108 | /* |
---|
1109 | G4cout<<" Proj Meson end Qbar"<<G4endl; |
---|
1110 | G4cout<<"First string ============ "<<G4endl; |
---|
1111 | G4cout<<"end Q "<<end->GetDefinition()->GetPDGEncoding()<<" "<<end->Get4Momentum()<<G4endl; |
---|
1112 | G4cout<<"G Q"<<Gquark->GetDefinition()->GetPDGEncoding()<<" "<<Gquark->Get4Momentum()<<G4endl; |
---|
1113 | G4cout<<"Sum P "<<(Gquark->Get4Momentum()+end->Get4Momentum())<<G4endl; |
---|
1114 | G4cout<<"Secondstring ============ "<<G4endl; |
---|
1115 | G4cout<<"G antQ "<<Ganti_quark->GetDefinition()->GetPDGEncoding()<<" "<<Ganti_quark->Get4Momentum()<<G4endl; |
---|
1116 | G4cout<<"startQ "<<start->GetDefinition()->GetPDGEncoding()<<" "<<start->Get4Momentum()<<G4endl; |
---|
1117 | G4cout<<"Sum P "<<(Ganti_quark->Get4Momentum()+start->Get4Momentum())<<G4endl; |
---|
1118 | */ |
---|
1119 | } // end of if(end->GetPDGcode() > 0) |
---|
1120 | } else { // Target |
---|
1121 | if(end->GetDefinition()->GetPDGEncoding() > 0 ) // A quark on the end |
---|
1122 | { // Quark on the end |
---|
1123 | FirstString = new G4ExcitedString(Ganti_quark,end ,-1); |
---|
1124 | SecondString= new G4ExcitedString(start ,Gquark,-1); |
---|
1125 | Ganti_quark->Set4Momentum(PkinkQ2); |
---|
1126 | Gquark->Set4Momentum(PkinkQ1); |
---|
1127 | /* |
---|
1128 | G4cout<<" Targ Meson end Q"<<G4endl; |
---|
1129 | G4cout<<"First string ============ "<<G4endl; |
---|
1130 | G4cout<<"G antiQ"<<Ganti_quark->GetDefinition()->GetPDGEncoding()<<" "<<Ganti_quark->Get4Momentum()<<G4endl; |
---|
1131 | G4cout<<"end Q "<<end->GetDefinition()->GetPDGEncoding()<<" "<<end->Get4Momentum()<<G4endl; |
---|
1132 | G4cout<<"Sum P "<<(Ganti_quark->Get4Momentum()+end->Get4Momentum())<<G4endl; |
---|
1133 | G4cout<<"Secondstring ============ "<<G4endl; |
---|
1134 | G4cout<<"startQ "<<start->GetDefinition()->GetPDGEncoding()<<" "<<start->Get4Momentum()<<G4endl; |
---|
1135 | G4cout<<"G Q "<<Gquark->GetDefinition()->GetPDGEncoding()<<" "<<Gquark->Get4Momentum()<<G4endl; |
---|
1136 | G4cout<<"Sum P "<<(Gquark->Get4Momentum()+start->Get4Momentum())<<G4endl; |
---|
1137 | */ |
---|
1138 | } else |
---|
1139 | { // Anti_Quark on the end |
---|
1140 | FirstString = new G4ExcitedString(Gquark,end ,-1); |
---|
1141 | SecondString= new G4ExcitedString(start ,Ganti_quark,-1); |
---|
1142 | Gquark->Set4Momentum(PkinkQ2); |
---|
1143 | Ganti_quark->Set4Momentum(PkinkQ1); |
---|
1144 | /* |
---|
1145 | G4cout<<" Targ Meson end Qbar"<<G4endl; |
---|
1146 | G4cout<<"First string ============ "<<G4endl; |
---|
1147 | G4cout<<"G Q"<<Gquark->GetDefinition()->GetPDGEncoding()<<" "<<Gquark->Get4Momentum()<<G4endl; |
---|
1148 | G4cout<<"end Q "<<end->GetDefinition()->GetPDGEncoding()<<" "<<end->Get4Momentum()<<G4endl; |
---|
1149 | G4cout<<"Sum P "<<(Gquark->Get4Momentum()+end->Get4Momentum())<<G4endl; |
---|
1150 | G4cout<<"Secondstring ============ "<<G4endl; |
---|
1151 | G4cout<<"startQ "<<start->GetDefinition()->GetPDGEncoding()<<" "<<start->Get4Momentum()<<G4endl; |
---|
1152 | G4cout<<"G antQ "<<Ganti_quark->GetDefinition()->GetPDGEncoding()<<" "<<Ganti_quark->Get4Momentum()<<G4endl; |
---|
1153 | G4cout<<"Sum P "<<(Ganti_quark->Get4Momentum()+start->Get4Momentum())<<G4endl; |
---|
1154 | */ |
---|
1155 | } // end of if(end->GetPDGcode() > 0) |
---|
1156 | } // end of if ( isProjectile ) |
---|
1157 | } else // if(absPDGCode < 1000) |
---|
1158 | { // Baryon/AntiBaryon |
---|
1159 | if ( isProjectile ) |
---|
1160 | { // Projectile |
---|
1161 | if((end->GetDefinition()->GetParticleType() == "diquarks") && |
---|
1162 | (end->GetDefinition()->GetPDGEncoding() > 0 ) ) |
---|
1163 | { // DiQuark on the end |
---|
1164 | FirstString = new G4ExcitedString(end ,Gquark, +1); |
---|
1165 | SecondString= new G4ExcitedString(Ganti_quark,start ,+1); |
---|
1166 | Gquark->Set4Momentum(PkinkQ1); |
---|
1167 | Ganti_quark->Set4Momentum(PkinkQ2); |
---|
1168 | /* |
---|
1169 | G4cout<<" Proj baryon end QQ"<<G4endl; |
---|
1170 | G4cout<<"First string ============ "<<G4endl; |
---|
1171 | G4cout<<"end OQ "<<end->GetDefinition()->GetPDGEncoding()<<" "<<end->Get4Momentum()<<G4endl; |
---|
1172 | G4cout<<"G Q"<<Gquark->GetDefinition()->GetPDGEncoding()<<" "<<Gquark->Get4Momentum()<<G4endl; |
---|
1173 | G4cout<<"Sum P "<<(Gquark->Get4Momentum()+end->Get4Momentum())<<G4endl; |
---|
1174 | G4cout<<"Secondstring ============ "<<G4endl; |
---|
1175 | G4cout<<"G Qbar"<<Ganti_quark->GetDefinition()->GetPDGEncoding()<<" "<<Ganti_quark->Get4Momentum()<<G4endl; |
---|
1176 | G4cout<<"startQ "<<start->GetDefinition()->GetPDGEncoding()<<" "<<start->Get4Momentum()<<G4endl; |
---|
1177 | G4cout<<"Sum P "<<(Ganti_quark->Get4Momentum()+start->Get4Momentum())<<G4endl; |
---|
1178 | */ |
---|
1179 | } else |
---|
1180 | { // Anti_DiQuark on the end or quark |
---|
1181 | FirstString = new G4ExcitedString(end ,Ganti_quark, +1); |
---|
1182 | SecondString= new G4ExcitedString(Gquark,start ,+1); |
---|
1183 | Ganti_quark->Set4Momentum(PkinkQ1); |
---|
1184 | Gquark->Set4Momentum(PkinkQ2); |
---|
1185 | /* |
---|
1186 | G4cout<<" Proj baryon end Q"<<G4endl; |
---|
1187 | G4cout<<"First string ============ "<<G4endl; |
---|
1188 | G4cout<<"end OQ "<<end->GetDefinition()->GetPDGEncoding()<<" "<<end->Get4Momentum()<<G4endl; |
---|
1189 | G4cout<<"G antQ"<<Ganti_quark->GetDefinition()->GetPDGEncoding()<<" "<<Ganti_quark->Get4Momentum()<<G4endl; |
---|
1190 | G4cout<<"Sum P "<<(Ganti_quark->Get4Momentum()+end->Get4Momentum())<<G4endl; |
---|
1191 | G4cout<<"Secondstring ============ "<<G4endl; |
---|
1192 | G4cout<<"G Q "<<Gquark->GetDefinition()->GetPDGEncoding()<<" "<<Gquark->Get4Momentum()<<G4endl; |
---|
1193 | G4cout<<"startQ "<<start->GetDefinition()->GetPDGEncoding()<<" "<<start->Get4Momentum()<<G4endl; |
---|
1194 | G4cout<<"Sum P "<<(Gquark->Get4Momentum()+start->Get4Momentum())<<G4endl; |
---|
1195 | */ |
---|
1196 | } // end of if(end->GetPDGcode() > 0) |
---|
1197 | } else { // Target |
---|
1198 | |
---|
1199 | if((end->GetDefinition()->GetParticleType() == "diquarks") && |
---|
1200 | (end->GetDefinition()->GetPDGEncoding() > 0 ) ) |
---|
1201 | { // DiQuark on the end |
---|
1202 | FirstString = new G4ExcitedString(Gquark,end ,-1); |
---|
1203 | |
---|
1204 | SecondString= new G4ExcitedString(start ,Ganti_quark,-1); |
---|
1205 | Gquark->Set4Momentum(PkinkQ1); |
---|
1206 | Ganti_quark->Set4Momentum(PkinkQ2); |
---|
1207 | /* |
---|
1208 | G4cout<<" Targ baryon end QQ"<<G4endl; |
---|
1209 | G4cout<<"First string ============ "<<G4endl; |
---|
1210 | G4cout<<"G Q "<<Gquark->GetDefinition()->GetPDGEncoding()<<" "<<Gquark->Get4Momentum()<<G4endl; |
---|
1211 | G4cout<<"end OQ "<<end->GetDefinition()->GetPDGEncoding()<<" "<<end->Get4Momentum()<<G4endl; |
---|
1212 | G4cout<<"Sum P "<<(Gquark->Get4Momentum()+end->Get4Momentum())<<G4endl; |
---|
1213 | G4cout<<"Secondstring ============ "<<G4endl; |
---|
1214 | G4cout<<"startQ "<<start->GetDefinition()->GetPDGEncoding()<<" "<<start->Get4Momentum()<<G4endl; |
---|
1215 | G4cout<<"G Qbar"<<Ganti_quark->GetDefinition()->GetPDGEncoding()<<" "<<Ganti_quark->Get4Momentum()<<G4endl; |
---|
1216 | G4cout<<"Sum P "<<(Ganti_quark->Get4Momentum()+start->Get4Momentum())<<G4endl; |
---|
1217 | */ |
---|
1218 | } else |
---|
1219 | { // Anti_DiQuark on the end or Q |
---|
1220 | FirstString = new G4ExcitedString(Ganti_quark,end ,-1); |
---|
1221 | SecondString= new G4ExcitedString(start ,Gquark,-1); |
---|
1222 | Gquark->Set4Momentum(PkinkQ2); |
---|
1223 | Ganti_quark->Set4Momentum(PkinkQ1); |
---|
1224 | /* |
---|
1225 | G4cout<<" Targ baryon end Q"<<G4endl; |
---|
1226 | G4cout<<"First string ============ "<<G4endl; |
---|
1227 | G4cout<<"G Qbar"<<Ganti_quark->GetDefinition()->GetPDGEncoding()<<" "<<Ganti_quark->Get4Momentum()<<G4endl; |
---|
1228 | G4cout<<"end O "<<end->GetDefinition()->GetPDGEncoding()<<" "<<end->Get4Momentum()<<G4endl; |
---|
1229 | G4cout<<"Sum P "<<(Ganti_quark->Get4Momentum()+end->Get4Momentum())<<G4endl; |
---|
1230 | G4cout<<"Secondstring ============ "<<G4endl; |
---|
1231 | G4cout<<"startQ "<<start->GetDefinition()->GetPDGEncoding()<<" "<<start->Get4Momentum()<<G4endl; |
---|
1232 | G4cout<<"G Q "<<Gquark->GetDefinition()->GetPDGEncoding()<<" "<<Gquark->Get4Momentum()<<G4endl; |
---|
1233 | G4cout<<"Sum P "<<(Gquark->Get4Momentum()+start->Get4Momentum())<<G4endl; |
---|
1234 | */ |
---|
1235 | } // end of if(end->GetPDGcode() > 0) |
---|
1236 | } // end of if ( isProjectile ) |
---|
1237 | } // end of if(absPDGcode < 1000) |
---|
1238 | |
---|
1239 | FirstString->SetTimeOfCreation(hadron->GetTimeOfCreation()); |
---|
1240 | FirstString->SetPosition(hadron->GetPosition()); |
---|
1241 | |
---|
1242 | SecondString->SetTimeOfCreation(hadron->GetTimeOfCreation()); |
---|
1243 | SecondString->SetPosition(hadron->GetPosition()); |
---|
1244 | |
---|
1245 | // ------------------------------------------------------------------------- |
---|
1246 | } else // End of kink is possible |
---|
1247 | { // Kink is impossible |
---|
1248 | if ( isProjectile ) |
---|
1249 | { |
---|
1250 | FirstString= new G4ExcitedString(end,start, +1); |
---|
1251 | } else { |
---|
1252 | FirstString= new G4ExcitedString(start,end, -1); |
---|
1253 | } |
---|
1254 | |
---|
1255 | SecondString=0; |
---|
1256 | |
---|
1257 | FirstString->SetTimeOfCreation(hadron->GetTimeOfCreation()); |
---|
1258 | FirstString->SetPosition(hadron->GetPosition()); |
---|
1259 | |
---|
1260 | // momenta of string ends |
---|
1261 | // |
---|
1262 | G4double Momentum=hadron->Get4Momentum().vect().mag(); |
---|
1263 | G4double Plus=hadron->Get4Momentum().e() + Momentum; |
---|
1264 | G4double Minus=hadron->Get4Momentum().e() - Momentum; |
---|
1265 | |
---|
1266 | G4ThreeVector tmp; |
---|
1267 | if(Momentum > 0.) |
---|
1268 | { |
---|
1269 | tmp.set(hadron->Get4Momentum().px(), |
---|
1270 | hadron->Get4Momentum().py(), |
---|
1271 | hadron->Get4Momentum().pz()); |
---|
1272 | tmp/=Momentum; |
---|
1273 | } |
---|
1274 | else |
---|
1275 | { |
---|
1276 | tmp.set(0.,0.,1.); |
---|
1277 | } |
---|
1278 | |
---|
1279 | G4LorentzVector Pstart(tmp,0.); |
---|
1280 | G4LorentzVector Pend(tmp,0.); |
---|
1281 | |
---|
1282 | if(isProjectile) |
---|
1283 | { |
---|
1284 | Pstart*=(-1.)*Minus/2.; |
---|
1285 | Pend *=(+1.)*Plus /2.; |
---|
1286 | } |
---|
1287 | else |
---|
1288 | { |
---|
1289 | Pstart*=(+1.)*Plus/2.; |
---|
1290 | Pend *=(-1.)*Minus/2.; |
---|
1291 | } |
---|
1292 | |
---|
1293 | Momentum=-Pstart.mag(); |
---|
1294 | Pstart.setT(Momentum); // It is assumed that quark has m=0. |
---|
1295 | |
---|
1296 | Momentum=-Pend.mag(); |
---|
1297 | Pend.setT(Momentum); // It is assumed that di-quark has m=0. |
---|
1298 | |
---|
1299 | start->Set4Momentum(Pstart); |
---|
1300 | end->Set4Momentum(Pend); |
---|
1301 | SecondString=0; |
---|
1302 | } // End of kink is impossible |
---|
1303 | |
---|
1304 | #ifdef G4_FTFDEBUG |
---|
1305 | G4cout << " generated string flavors " |
---|
1306 | << start->GetPDGcode() << " / " |
---|
1307 | << end->GetPDGcode() << G4endl; |
---|
1308 | G4cout << " generated string momenta: quark " |
---|
1309 | << start->Get4Momentum() << "mass : " |
---|
1310 | <<start->Get4Momentum().mag() << G4endl; |
---|
1311 | G4cout << " generated string momenta: Diquark " |
---|
1312 | << end ->Get4Momentum() |
---|
1313 | << "mass : " <<end->Get4Momentum().mag()<< G4endl; |
---|
1314 | G4cout << " sum of ends " << Pstart+Pend << G4endl; |
---|
1315 | G4cout << " Original " << hadron->Get4Momentum() << G4endl; |
---|
1316 | #endif |
---|
1317 | |
---|
1318 | return; |
---|
1319 | |
---|
1320 | } |
---|
1321 | |
---|
1322 | |
---|
1323 | // --------- private methods ---------------------- |
---|
1324 | |
---|
1325 | // --------------------------------------------------------------------- |
---|
1326 | G4double G4DiffractiveExcitation::ChooseP(G4double Pmin, G4double Pmax) const |
---|
1327 | { |
---|
1328 | // choose an x between Xmin and Xmax with P(x) ~ 1/x |
---|
1329 | // to be improved... |
---|
1330 | |
---|
1331 | G4double range=Pmax-Pmin; |
---|
1332 | |
---|
1333 | if ( Pmin <= 0. || range <=0. ) |
---|
1334 | { |
---|
1335 | G4cout << " Pmin, range : " << Pmin << " , " << range << G4endl; |
---|
1336 | throw G4HadronicException(__FILE__, __LINE__, "G4DiffractiveExcitation::ChooseP : Invalid arguments "); |
---|
1337 | } |
---|
1338 | |
---|
1339 | G4double P=Pmin * std::pow(Pmax/Pmin,G4UniformRand()); |
---|
1340 | return P; |
---|
1341 | } |
---|
1342 | |
---|
1343 | // --------------------------------------------------------------------- |
---|
1344 | G4ThreeVector G4DiffractiveExcitation::GaussianPt(G4double AveragePt2, |
---|
1345 | G4double maxPtSquare) const |
---|
1346 | { // @@ this method is used in FTFModel as well. Should go somewhere common! |
---|
1347 | |
---|
1348 | G4double Pt2; |
---|
1349 | Pt2 = -AveragePt2 * std::log(1. + G4UniformRand() * |
---|
1350 | (std::exp(-maxPtSquare/AveragePt2)-1.)); |
---|
1351 | |
---|
1352 | G4double Pt=std::sqrt(Pt2); |
---|
1353 | G4double phi=G4UniformRand() * twopi; |
---|
1354 | return G4ThreeVector (Pt*std::cos(phi), Pt*std::sin(phi), 0.); |
---|
1355 | } |
---|
1356 | |
---|
1357 | // --------------------------------------------------------------------- |
---|
1358 | G4double G4DiffractiveExcitation::GetQuarkFractionOfKink(G4double zmin, G4double zmax) const |
---|
1359 | { |
---|
1360 | G4double z, yf; |
---|
1361 | do { |
---|
1362 | z = zmin + G4UniformRand()*(zmax-zmin); |
---|
1363 | yf = z*z +sqr(1 - z); |
---|
1364 | } |
---|
1365 | while (G4UniformRand() > yf); |
---|
1366 | return z; |
---|
1367 | } |
---|
1368 | // --------------------------------------------------------------------- |
---|
1369 | void G4DiffractiveExcitation::UnpackMeson(const G4int IdPDG, G4int &Q1, G4int &Q2) const // Uzhi 7.09.09 |
---|
1370 | { |
---|
1371 | G4int absIdPDG = std::abs(IdPDG); |
---|
1372 | Q1= absIdPDG/ 100; |
---|
1373 | Q2= (absIdPDG %100)/10; |
---|
1374 | |
---|
1375 | G4int anti= 1 -2 * ( std::max( Q1, Q2 ) % 2 ); |
---|
1376 | |
---|
1377 | if (IdPDG < 0 ) anti *=-1; |
---|
1378 | Q1 *= anti; |
---|
1379 | Q2 *= -1 * anti; |
---|
1380 | return; |
---|
1381 | } |
---|
1382 | // --------------------------------------------------------------------- |
---|
1383 | void G4DiffractiveExcitation::UnpackBaryon(G4int IdPDG, |
---|
1384 | G4int &Q1, G4int &Q2, G4int &Q3) const // Uzhi 7.09.09 |
---|
1385 | { |
---|
1386 | Q1 = IdPDG / 1000; |
---|
1387 | Q2 = (IdPDG % 1000) / 100; |
---|
1388 | Q3 = (IdPDG % 100) / 10; |
---|
1389 | return; |
---|
1390 | } |
---|
1391 | // --------------------------------------------------------------------- |
---|
1392 | G4int G4DiffractiveExcitation::NewNucleonId(G4int Q1, G4int Q2, G4int Q3) const // Uzhi 7.09.09 |
---|
1393 | { |
---|
1394 | G4int TmpQ(0); |
---|
1395 | if( Q3 > Q2 ) |
---|
1396 | { |
---|
1397 | TmpQ = Q2; |
---|
1398 | Q2 = Q3; |
---|
1399 | Q3 = TmpQ; |
---|
1400 | } else if( Q3 > Q1 ) |
---|
1401 | { |
---|
1402 | TmpQ = Q1; |
---|
1403 | Q1 = Q3; |
---|
1404 | Q3 = TmpQ; |
---|
1405 | } |
---|
1406 | |
---|
1407 | if( Q2 > Q1 ) |
---|
1408 | { |
---|
1409 | TmpQ = Q1; |
---|
1410 | Q1 = Q2; |
---|
1411 | Q2 = TmpQ; |
---|
1412 | } |
---|
1413 | |
---|
1414 | G4int NewCode = Q1*1000 + Q2* 100 + Q3* 10 + 2; |
---|
1415 | return NewCode; |
---|
1416 | } |
---|
1417 | // --------------------------------------------------------------------- |
---|
1418 | G4DiffractiveExcitation::G4DiffractiveExcitation(const G4DiffractiveExcitation &) |
---|
1419 | { |
---|
1420 | throw G4HadronicException(__FILE__, __LINE__, "G4DiffractiveExcitation copy contructor not meant to be called"); |
---|
1421 | } |
---|
1422 | |
---|
1423 | |
---|
1424 | G4DiffractiveExcitation::~G4DiffractiveExcitation() |
---|
1425 | { |
---|
1426 | } |
---|
1427 | |
---|
1428 | |
---|
1429 | const G4DiffractiveExcitation & G4DiffractiveExcitation::operator=(const G4DiffractiveExcitation &) |
---|
1430 | { |
---|
1431 | throw G4HadronicException(__FILE__, __LINE__, "G4DiffractiveExcitation = operator meant to be called"); |
---|
1432 | return *this; |
---|
1433 | } |
---|
1434 | |
---|
1435 | |
---|
1436 | int G4DiffractiveExcitation::operator==(const G4DiffractiveExcitation &) const |
---|
1437 | { |
---|
1438 | throw G4HadronicException(__FILE__, __LINE__, "G4DiffractiveExcitation == operator meant to be called"); |
---|
1439 | return false; |
---|
1440 | } |
---|
1441 | |
---|
1442 | int G4DiffractiveExcitation::operator!=(const G4DiffractiveExcitation &) const |
---|
1443 | { |
---|
1444 | throw G4HadronicException(__FILE__, __LINE__, "G4DiffractiveExcitation != operator meant to be called"); |
---|
1445 | return true; |
---|
1446 | } |
---|