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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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 | #ifndef G4ExcitedString_h |
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30 | #define G4ExcitedString_h 1 |
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31 | |
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32 | // ------------------------------------------------------------ |
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33 | // GEANT 4 class header file |
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34 | // |
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35 | // ---------------- G4ExcitedString ---------------- |
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36 | // by Gunter Folger, June 1998. |
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37 | // class for an excited string used by Parton String Models |
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38 | // ------------------------------------------------------------ |
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39 | |
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40 | #include "G4ios.hh" |
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41 | #include "globals.hh" |
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42 | #include "G4ThreeVector.hh" |
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43 | #include "G4LorentzVector.hh" |
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44 | #include "G4LorentzRotation.hh" |
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45 | #include "G4Parton.hh" |
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46 | #include "G4PartonVector.hh" |
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47 | #include "G4KineticTrack.hh" |
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48 | #include "G4HadronicException.hh" |
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49 | #include <algorithm> |
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50 | |
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51 | class G4ExcitedString |
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52 | { |
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53 | |
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54 | public: |
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55 | |
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56 | enum { |
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57 | PROJECTILE = 1, |
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58 | TARGET = -1 |
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59 | }; |
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60 | |
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61 | G4ExcitedString(G4Parton* Color, G4Parton* Gluon, G4Parton* AntiColor, G4int Direction=PROJECTILE); |
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62 | G4ExcitedString(G4Parton* Color, G4Parton* AntiColor, G4int Direction=PROJECTILE); |
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63 | G4ExcitedString(G4KineticTrack * atrack); |
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64 | |
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65 | G4ExcitedString(const G4ExcitedString &right); |
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66 | |
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67 | ~G4ExcitedString(); |
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68 | |
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69 | int operator==(const G4ExcitedString &right) const; |
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70 | |
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71 | int operator!=(const G4ExcitedString &right) const; |
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72 | |
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73 | const G4ThreeVector & GetPosition() const; |
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74 | |
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75 | void SetPosition(const G4ThreeVector &aPosition); |
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76 | |
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77 | const G4PartonVector * GetPartonList() const; |
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78 | |
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79 | G4LorentzVector Get4Momentum() const; |
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80 | void LorentzRotate(const G4LorentzRotation & rotation); |
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81 | |
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82 | void InsertParton(G4Parton * aParton, const G4Parton * addafter = NULL); |
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83 | |
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84 | G4LorentzRotation TransformToCenterOfMass(); |
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85 | G4LorentzRotation TransformToAlignedCms(); |
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86 | |
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87 | |
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88 | void Boost(G4ThreeVector& Velocity); |
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89 | |
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90 | G4Parton* GetColorParton(void) const; |
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91 | G4Parton* GetGluon(void) const; |
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92 | G4Parton* GetAntiColorParton(void) const; |
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93 | G4Parton* GetGluon(G4int GluonPos) const; |
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94 | |
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95 | G4KineticTrack * GetKineticTrack() const; |
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96 | |
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97 | G4Parton* GetLeftParton(void) const; |
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98 | G4Parton* GetRightParton(void) const; |
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99 | |
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100 | G4bool IsItKinkyString(void) const; |
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101 | G4int GetDirection(void) const; |
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102 | |
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103 | G4bool IsExcited() const; |
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104 | |
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105 | |
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106 | private: |
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107 | |
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108 | G4int theDirection; // must be 1 or -1 (PROJECTILE or TARGET) |
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109 | G4ThreeVector thePosition; |
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110 | G4PartonVector thePartons; // would like initial capacity for 3 Partons. |
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111 | G4KineticTrack* theTrack; |
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112 | |
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113 | }; |
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114 | |
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115 | inline |
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116 | int G4ExcitedString::operator==(const G4ExcitedString &right) const |
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117 | { |
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118 | return this == &right; |
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119 | } |
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120 | |
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121 | inline |
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122 | int G4ExcitedString::operator!=(const G4ExcitedString &right) const |
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123 | { |
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124 | return this != &right; |
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125 | } |
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126 | |
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127 | inline |
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128 | const G4ThreeVector & G4ExcitedString::GetPosition() const |
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129 | { |
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130 | return thePosition; |
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131 | } |
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132 | |
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133 | inline |
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134 | void G4ExcitedString::SetPosition(const G4ThreeVector &aPosition) |
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135 | { |
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136 | thePosition= aPosition; |
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137 | } |
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138 | |
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139 | inline |
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140 | G4LorentzVector G4ExcitedString::Get4Momentum() const |
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141 | { |
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142 | G4LorentzVector momentum; |
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143 | for ( unsigned int index=0; index < thePartons.size() ; index++ ) |
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144 | { |
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145 | // std::cout << "HPW "<<thePartons[index]->Get4Momentum()<<std::endl; |
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146 | momentum += thePartons[index]->Get4Momentum(); |
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147 | } |
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148 | return momentum; |
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149 | } |
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150 | |
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151 | inline |
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152 | void G4ExcitedString::LorentzRotate(const G4LorentzRotation & rotation) |
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153 | { |
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154 | for ( unsigned int index=0; index < thePartons.size() ; index++ ) |
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155 | { |
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156 | thePartons[index]->Set4Momentum(rotation*thePartons[index]->Get4Momentum()); |
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157 | } |
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158 | } |
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159 | |
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160 | inline |
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161 | void G4ExcitedString::InsertParton(G4Parton *aParton, const G4Parton * addafter) |
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162 | { |
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163 | |
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164 | G4PartonVector::iterator insert_index; |
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165 | |
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166 | if ( addafter != NULL ) |
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167 | { |
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168 | insert_index=std::find(thePartons.begin(), thePartons.end(), addafter); |
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169 | if (insert_index == thePartons.end()) // No object addafter in thePartons |
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170 | { |
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171 | G4String text = "G4ExcitedString::InsertParton called with invalid second argument"; |
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172 | throw G4HadronicException(__FILE__, __LINE__, text); |
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173 | } |
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174 | } |
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175 | |
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176 | thePartons.insert(insert_index+1, aParton); |
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177 | } |
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178 | |
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179 | inline |
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180 | G4LorentzRotation G4ExcitedString::TransformToCenterOfMass() |
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181 | { |
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182 | G4LorentzVector momentum=Get4Momentum(); |
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183 | G4LorentzRotation toCms(-1*momentum.boostVector()); |
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184 | |
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185 | for ( unsigned int index=0; index < thePartons.size() ; index++ ) |
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186 | { |
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187 | momentum=toCms * thePartons[index]->Get4Momentum(); |
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188 | thePartons[index]->Set4Momentum(momentum); |
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189 | } |
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190 | return toCms; |
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191 | } |
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192 | |
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193 | inline |
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194 | G4LorentzRotation G4ExcitedString::TransformToAlignedCms() |
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195 | { |
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196 | G4LorentzVector momentum=Get4Momentum(); |
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197 | G4LorentzRotation toAlignedCms(-1*momentum.boostVector()); |
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198 | |
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199 | momentum= toAlignedCms* thePartons[0]->Get4Momentum(); |
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200 | toAlignedCms.rotateZ(-1*momentum.phi()); |
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201 | toAlignedCms.rotateY(-1*momentum.theta()); |
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202 | |
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203 | for ( unsigned int index=0; index < thePartons.size() ; index++ ) |
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204 | { |
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205 | momentum=toAlignedCms * thePartons[index]->Get4Momentum(); |
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206 | thePartons[index]->Set4Momentum(momentum); |
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207 | } |
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208 | return toAlignedCms; |
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209 | } |
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210 | |
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211 | |
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212 | inline |
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213 | const G4PartonVector * G4ExcitedString::GetPartonList() const |
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214 | { |
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215 | return &thePartons; |
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216 | } |
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217 | |
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218 | inline |
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219 | G4KineticTrack * G4ExcitedString::GetKineticTrack() const |
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220 | { |
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221 | return theTrack; |
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222 | } |
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223 | |
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224 | inline |
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225 | G4bool G4ExcitedString::IsExcited() const |
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226 | { |
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227 | return theTrack == 0; |
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228 | } |
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229 | |
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230 | |
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231 | #endif |
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232 | |
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233 | |
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