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 | |
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28 | |
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29 | // ------------------------------------------------------------ |
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30 | // GEANT 4 class implementation file |
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31 | // |
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32 | // ---------------- G4FragmentingString ---------------- |
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33 | // by Gunter Folger, September 2001. |
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34 | // class for an excited string used in Fragmention |
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35 | // ------------------------------------------------------------ |
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36 | |
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37 | |
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38 | // G4FragmentingString |
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39 | #include "G4FragmentingString.hh" |
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40 | #include "G4ExcitedString.hh" |
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41 | |
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42 | //--------------------------------------------------------------------------------- |
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43 | |
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44 | //--------------------------------------------------------------------------------- |
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45 | |
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46 | G4FragmentingString::G4FragmentingString(const G4FragmentingString &old) |
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47 | { |
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48 | LeftParton=old.LeftParton; |
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49 | RightParton=old.RightParton; |
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50 | Ptleft=old.Ptleft; |
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51 | Ptright=old.Ptright; |
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52 | Pplus=old.Pplus; |
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53 | Pminus=old.Pminus; |
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54 | decaying=old.decaying; |
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55 | } |
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56 | |
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57 | //--------------------------------------------------------------------------------- |
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58 | |
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59 | G4FragmentingString::G4FragmentingString(const G4ExcitedString &excited) |
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60 | { |
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61 | LeftParton=excited.GetLeftParton()->GetDefinition(); |
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62 | RightParton=excited.GetRightParton()->GetDefinition(); |
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63 | Ptleft=excited.GetLeftParton()->Get4Momentum().vect(); |
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64 | Ptleft.setZ(0.); |
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65 | Ptright=excited.GetRightParton()->Get4Momentum().vect(); |
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66 | Ptright.setZ(0.); |
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67 | G4LorentzVector P=excited.Get4Momentum(); |
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68 | Pplus =P.e() + P.pz(); |
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69 | Pminus=P.e() - P.pz(); |
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70 | decaying=None; |
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71 | } |
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72 | |
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73 | //--------------------------------------------------------------------------------- |
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74 | |
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75 | G4FragmentingString::G4FragmentingString(const G4FragmentingString &old, |
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76 | G4ParticleDefinition * newdecay, |
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77 | const G4LorentzVector *momentum) |
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78 | { |
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79 | decaying=None; |
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80 | if ( old.decaying == Left ) |
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81 | { |
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82 | //G4cout<<" Left "<<G4endl; |
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83 | //G4cout<<"Pt right "<<Ptright<<G4endl; |
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84 | //G4cout<<"Pt left "<<Ptleft <<G4endl; |
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85 | RightParton= old.RightParton; |
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86 | Ptright = old.Ptright; |
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87 | LeftParton = newdecay; |
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88 | Ptleft = old.Ptleft - momentum->vect(); |
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89 | Ptleft.setZ(0.); |
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90 | //G4cout<<"Pt right "<<Ptright<<G4endl; |
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91 | //G4cout<<"Pt left "<<Ptleft <<G4endl; |
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92 | } else if ( old.decaying == Right ) |
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93 | { |
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94 | //G4cout<<" Right "<<G4endl; |
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95 | //G4cout<<"Pt right "<<Ptright<<G4endl; |
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96 | //G4cout<<"Pt left "<<Ptleft <<G4endl; |
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97 | RightParton = newdecay; |
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98 | Ptright = old.Ptright - momentum->vect(); |
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99 | Ptright.setZ(0.); |
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100 | LeftParton = old.LeftParton; |
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101 | Ptleft = old.Ptleft; |
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102 | //G4cout<<"Pt right "<<Ptright<<G4endl; |
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103 | //G4cout<<"Pt left "<<Ptleft <<G4endl; |
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104 | } else |
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105 | { |
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106 | throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::G4FragmentingString: no decay Direction defined"); |
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107 | } |
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108 | Pplus = old.Pplus - (momentum->e() + momentum->pz()); |
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109 | Pminus = old.Pminus - (momentum->e() - momentum->pz()); |
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110 | |
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111 | //G4double Eold=0.5 * (old.Pplus + old.Pminus); |
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112 | //G4double Enew=0.5 * (Pplus + Pminus); |
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113 | } |
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114 | |
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115 | |
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116 | //--------------------------------------------------------------------------------- |
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117 | |
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118 | G4FragmentingString::G4FragmentingString(const G4FragmentingString &old, // Uzhi |
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119 | G4ParticleDefinition * newdecay) // Uzhi |
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120 | { // Uzhi |
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121 | decaying=None; // Uzhi |
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122 | if ( old.decaying == Left ) // Uzhi |
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123 | { // Uzhi |
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124 | RightParton= old.RightParton; // Uzhi |
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125 | LeftParton = newdecay; // Uzhi |
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126 | } else if ( old.decaying == Right ) // Uzhi |
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127 | { // Uzhi |
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128 | RightParton = newdecay; // Uzhi |
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129 | LeftParton = old.LeftParton; // Uzhi |
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130 | } else // Uzhi |
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131 | { |
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132 | throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::G4FragmentingString: no decay Direction defined"); |
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133 | } |
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134 | } |
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135 | |
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136 | |
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137 | //--------------------------------------------------------------------------------- |
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138 | |
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139 | G4FragmentingString::~G4FragmentingString() |
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140 | {} |
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141 | |
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142 | |
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143 | //--------------------------------------------------------------------------------- |
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144 | |
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145 | void G4FragmentingString::SetLeftPartonStable() |
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146 | { |
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147 | theStableParton=GetLeftParton(); |
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148 | theDecayParton=GetRightParton(); |
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149 | decaying=Right; |
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150 | } |
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151 | |
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152 | //--------------------------------------------------------------------------------- |
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153 | |
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154 | void G4FragmentingString::SetRightPartonStable() |
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155 | { |
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156 | theStableParton=GetRightParton(); |
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157 | theDecayParton=GetLeftParton(); |
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158 | decaying=Left; |
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159 | } |
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160 | |
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161 | //--------------------------------------------------------------------------------- |
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162 | |
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163 | G4int G4FragmentingString::GetDecayDirection() const |
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164 | { |
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165 | if (decaying == Left ) return +1; |
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166 | else if (decaying == Right) return -1; |
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167 | else throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::GetDecayDirection: decay side UNdefined!"); |
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168 | return 0; |
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169 | } |
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170 | |
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171 | //--------------------------------------------------------------------------------- |
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172 | |
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173 | G4bool G4FragmentingString::FourQuarkString() const |
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174 | { |
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175 | return LeftParton->GetParticleSubType()== "di_quark" |
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176 | && RightParton->GetParticleSubType()== "di_quark"; |
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177 | } |
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178 | |
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179 | //--------------------------------------------------------------------------------- |
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180 | |
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181 | G4bool G4FragmentingString::DecayIsQuark() |
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182 | { |
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183 | return theDecayParton->GetParticleSubType()== "quark"; |
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184 | } |
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185 | |
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186 | G4bool G4FragmentingString::StableIsQuark() |
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187 | { |
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188 | return theStableParton->GetParticleSubType()== "quark"; |
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189 | } |
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190 | |
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191 | //--------------------------------------------------------------------------------- |
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192 | |
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193 | G4ThreeVector G4FragmentingString::StablePt() |
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194 | { |
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195 | if (decaying == Left ) return Ptright; |
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196 | else if (decaying == Right ) return Ptleft; |
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197 | else throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::DecayPt: decay side UNdefined!"); |
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198 | return G4ThreeVector(); |
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199 | } |
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200 | |
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201 | G4ThreeVector G4FragmentingString::DecayPt() |
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202 | { |
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203 | if (decaying == Left ) return Ptleft; |
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204 | else if (decaying == Right ) return Ptright; |
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205 | else throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::DecayPt: decay side UNdefined!"); |
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206 | return G4ThreeVector(); |
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207 | } |
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208 | |
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209 | //--------------------------------------------------------------------------------- |
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210 | |
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211 | G4double G4FragmentingString::LightConePlus() |
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212 | { |
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213 | return Pplus; |
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214 | } |
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215 | |
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216 | G4double G4FragmentingString::LightConeMinus() |
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217 | { |
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218 | return Pminus; |
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219 | } |
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220 | |
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221 | G4double G4FragmentingString::LightConeDecay() |
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222 | { |
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223 | if (decaying == Left ) return Pplus; |
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224 | else if (decaying == Right ) return Pminus; |
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225 | else throw G4HadronicException(__FILE__, __LINE__, "G4FragmentingString::DecayPt: decay side UNdefined!"); |
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226 | return 0; |
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227 | } |
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228 | |
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229 | //--------------------------------------------------------------------------------- |
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230 | |
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231 | G4LorentzVector G4FragmentingString::Get4Momentum() const |
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232 | { |
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233 | G4LorentzVector momentum(Ptleft+Ptright,0); |
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234 | momentum.setPz(0.5*(Pplus-Pminus)); |
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235 | momentum.setE(0.5*(Pplus+Pminus)); |
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236 | return momentum; |
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237 | } |
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238 | |
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239 | G4double G4FragmentingString::Mass2() const |
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240 | { |
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241 | return Pplus*Pminus - (Ptleft+Ptright).mag2(); |
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242 | } |
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243 | |
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244 | G4double G4FragmentingString::Mass() const |
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245 | { |
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246 | return std::sqrt(this->Mass2()); |
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247 | } |
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248 | |
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249 | G4double G4FragmentingString::MassT2() const |
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250 | { |
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251 | return Pplus*Pminus; |
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252 | } |
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