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 | // #include "G4ios.hh" |
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27 | |
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28 | //**************************************************************************************************************** |
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29 | template<class ParticipantType> |
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30 | G4QGSModel<ParticipantType>::G4QGSModel() |
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31 | { |
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32 | G4VPartonStringModel::SetThisPointer(this); |
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33 | } |
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34 | template<class ParticipantType> |
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35 | G4QGSModel<ParticipantType>::G4QGSModel(const G4QGSModel &right) |
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36 | { |
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37 | G4VPartonStringModel::SetThisPointer(this); |
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38 | } |
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39 | template<class ParticipantType> |
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40 | G4QGSModel<ParticipantType>::~G4QGSModel() |
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41 | { |
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42 | } |
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43 | |
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44 | template<class ParticipantType> |
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45 | void G4QGSModel<ParticipantType>::Init(const G4Nucleus & aNucleus, const G4DynamicParticle & aProjectile) |
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46 | { |
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47 | // clean-up and consistency with design, HPW Feb 1999 |
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48 | theParticipants.Init(aNucleus.GetN(),aNucleus.GetZ()); |
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49 | theCurrentVelocity.setX(0); |
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50 | theCurrentVelocity.setY(0); |
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51 | // HPW Feb 1999 |
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52 | // this is an approximation, neglecting the motion of nucleons in the nucleus & p,n mass differences. @@@ |
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53 | // G4double vz_old = aProjectile.Get4Momentum().pz()/ |
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54 | // (aProjectile.Get4Momentum().e() + G4Proton::Proton()->GetPDGMass()); |
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55 | G4double nCons = 1; |
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56 | if(std::abs(aProjectile.GetDefinition()->GetBaryonNumber()) !=0) |
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57 | { |
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58 | nCons = std::abs(aProjectile.GetDefinition()->GetBaryonNumber()); |
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59 | } |
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60 | G4double pz_per_projectile = aProjectile.Get4Momentum().pz()/nCons; |
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61 | // G4double e_per_projectile = aProjectile.Get4Momentum().vect()*aProjectile.Get4Momentum().vect(); |
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62 | // e_per_projectile /=nCons*nCons; |
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63 | // e_per_projectile += G4Proton::Proton()->GetPDGMass()*G4Proton::Proton()->GetPDGMass(); |
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64 | G4double e_per_projectile = aProjectile.Get4Momentum()*aProjectile.Get4Momentum(); |
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65 | e_per_projectile += aProjectile.Get4Momentum().vect()*aProjectile.Get4Momentum().vect(); |
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66 | e_per_projectile /=nCons*nCons; |
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67 | e_per_projectile = std::sqrt(e_per_projectile); |
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68 | e_per_projectile += G4Proton::Proton()->GetPDGMass(); |
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69 | G4double vz = pz_per_projectile/e_per_projectile; |
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70 | //--DEBUG-- G4cout << "IncomingMomentum - vz "<<aProjectile.Get4Momentum()<< ", " << vz <<G4endl; |
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71 | theCurrentVelocity.setZ(vz); |
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72 | theParticipants.DoLorentzBoost(-theCurrentVelocity); |
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73 | G4LorentzVector Mom = aProjectile.Get4Momentum(); |
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74 | Mom.boost(-theCurrentVelocity); |
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75 | G4ReactionProduct theProjectile; |
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76 | theProjectile.SetDefinition(aProjectile.GetDefinition()); |
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77 | theProjectile.SetTotalEnergy(Mom.e()); |
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78 | theProjectile.SetMomentum(Mom.vect()); |
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79 | //--DEBUG-- G4cout << "PreInteractionMomentum "<<Mom<<G4endl; |
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80 | theParticipants.BuildInteractions(theProjectile); |
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81 | theParticipants.GetWoundedNucleus()->DoLorentzBoost(theCurrentVelocity); |
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82 | } |
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83 | |
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84 | template<class ParticipantType> |
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85 | G4ExcitedStringVector * G4QGSModel<ParticipantType>::GetStrings() |
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86 | { |
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87 | // clean-up and consistancy with design, HPW Feb 1999 |
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88 | // also fixing a memory leak, removing unnecessary caching, and |
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89 | // streamlining of logic |
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90 | G4PartonPair* aPair; |
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91 | G4ExcitedStringVector* theStrings = new G4ExcitedStringVector; |
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92 | G4ExcitedString * aString; |
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93 | while( (aPair = theParticipants.GetNextPartonPair()) ) |
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94 | { |
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95 | if (aPair->GetCollisionType() == G4PartonPair::DIFFRACTIVE) |
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96 | { |
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97 | aString = theDiffractiveStringBuilder.BuildString(aPair); |
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98 | // G4cout << "diffractive "<<aString->Get4Momentum()<<G4endl; |
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99 | } |
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100 | else |
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101 | { |
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102 | aString = theSoftStringBuilder.BuildString(aPair); |
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103 | // G4cout << "soft "<<aString->Get4Momentum()<<G4endl; |
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104 | } |
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105 | //--DEBUG-- G4cout << " QGSModel.icc::GetStrings() theCurrentVelocity " << theCurrentVelocity << G4endl; |
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106 | aString->Boost(theCurrentVelocity); |
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107 | theStrings->push_back(aString); |
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108 | delete aPair; |
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109 | } |
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110 | //--DEBUG-- G4cout << G4endl; |
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111 | // for(G4int i=0; i<theStrings->size(); i++) |
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112 | // { |
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113 | // G4cout << "String = "<<theStrings->operator[](i)->Get4Momentum()<<G4endl; |
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114 | // } |
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115 | return theStrings; |
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116 | } |
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117 | |
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118 | template<class ParticipantType> |
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119 | G4V3DNucleus* G4QGSModel<ParticipantType>::GetWoundedNucleus() const |
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120 | { |
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121 | return theParticipants.GetWoundedNucleus(); |
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122 | } |
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123 | |
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124 | |
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125 | //********************************************************************************************************************* |
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126 | |
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