| 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 | // $Id: G4QCollision.hh,v 1.11 2008/10/02 21:10:07 dennis Exp $ |
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| 27 | // GEANT4 tag $Name: geant4-09-02-ref-02 $ |
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| 28 | // |
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| 29 | // ---------------- G4QCollision header ---------------- |
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| 30 | // by Mikhail Kossov, December 2003. |
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| 31 | // Header of G4QCollision class (mu-,pi-,K-) of the CHIPS Simulation Branch in GEANT4 |
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| 32 | // ------------------------------------------------------------------------------- |
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| 33 | // This is a unique CHIPS class for the Hadron-Nuclear Inelastic Interaction Prosesses. |
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| 34 | // ------------------------------------------------------------------------------- |
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| 35 | // At present (Dec.04) only pi+/-, K+/- proton, neutron, antiproton and antineutron |
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| 36 | // collisions with protons are implemented, which are fundamental for the in matter |
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| 37 | // simulation of hadronic reactions. The interactions of the same particles with |
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| 38 | // nuclei are planned only. The collisions of nuclei with nuclei are possible... |
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| 39 | // The simulation is based on the G4QuasmonString class, which extends the CHIPS model |
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| 40 | // to the highest energyes, implementing the Quasmon string with the |
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| 41 | // String->Quasmons->Hadrons scenario of the quark-gluon string fragmentation |
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| 42 | // --> CHIPS is a SU(3) event generator, so it does not include reactions with the |
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| 43 | // heavy (c,b,t), which can be simulated only by the SU(6) QUIPS (QUark Invariant |
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| 44 | // Phase Space) model which is an expantion of the CHIPS.-December 2003.M.Kossov.- |
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| 45 | // ------------------------------------------------------------------------------- |
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| 46 | // Algorithms: the interactions in CHIPS are described by the quark exchange (QE) process. |
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| 47 | // The first step is the low energy quark exchange. If as a result of the QE one or |
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| 48 | // both secondary hadrons are below the pi0 threshold (roughly) they are pushed to the |
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| 49 | // Ground State (GS) value(s). The excited (above the pi0 production threshold) hadronic |
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| 50 | // state is considered as a Quasmon, which is filled in the G4QuasmonVector of the |
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| 51 | // G4QuasmonString class. On the second step all G4Quasmons are decayed by the |
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| 52 | // G4Quasmon class and fiill the G4QHadronVector output. If the exchange quark is too far |
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| 53 | // in the rapidity space (a parameter of the G4QuasmonString class) from any of the quarks |
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| 54 | // of the other hadron it creates a string with the nearest in the rapidity space quark. |
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| 55 | // This string is converted into a Quasmon. This forces the coalescence of the residuals |
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| 56 | // in the another Quasmon, while the possibility exist to create more residual Quasmons |
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| 57 | // instead of one - one per each target-quark+projectile-antiquark(diquark) pair. This |
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| 58 | // possibility is tuned by the Drell-Yan pair production process. If the target (or |
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| 59 | // pojectile) are nuclei, then the Quasmons are created not only in vacuum, where they |
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| 60 | // can be fragmented by the G4Quasmon class, but in nuclear matter of the residual target |
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| 61 | // (or projectile). If the Quasmons are crated in nuclear matter, they are fragmented by |
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| 62 | // the G4QEnvironment class with the subsequent Quark Exchange nuclear fragmentation. |
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| 63 | // This is the planned scenario.- December 2004.Mikhail Kossov.- |
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| 64 | // -------------------------------------------------------------------------------- |
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| 65 | // **************************************************************************************** |
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| 66 | // ********* This HEADER is temporary moved from the photolepton_hadron directory ********* |
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| 67 | // ******* DO NOT MAKE ANY CHANGE! With time it'll move back to photolepton...(M.K.) ****** |
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| 68 | // **************************************************************************************** |
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| 69 | |
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| 70 | #ifndef G4QCollision_hh |
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| 71 | #define G4QCollision_hh |
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| 72 | |
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| 73 | // GEANT4 Headers |
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| 74 | #include "globals.hh" |
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| 75 | #include "G4ios.hh" |
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| 76 | #include "Randomize.hh" |
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| 77 | #include "G4VDiscreteProcess.hh" |
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| 78 | #include "G4Track.hh" |
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| 79 | #include "G4Step.hh" |
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| 80 | #include "G4ParticleTypes.hh" |
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| 81 | #include "G4VParticleChange.hh" |
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| 82 | #include "G4ParticleDefinition.hh" |
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| 83 | #include "G4DynamicParticle.hh" |
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| 84 | #include "G4NucleiPropertiesTable.hh" |
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| 85 | #include "G4ThreeVector.hh" |
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| 86 | #include "G4LorentzVector.hh" |
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| 87 | #include "G4HadronicProcessType.hh" |
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| 88 | |
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| 89 | // CHIPS Headers |
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| 90 | #include "G4QEnvironment.hh" |
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| 91 | #include "G4VQCrossSection.hh" |
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| 92 | #include "G4QIsotope.hh" |
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| 93 | #include "G4QProtonNuclearCrossSection.hh" |
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| 94 | #include "G4QPhotonNuclearCrossSection.hh" |
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| 95 | #include "G4QElectronNuclearCrossSection.hh" |
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| 96 | #include "G4QMuonNuclearCrossSection.hh" |
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| 97 | #include "G4QTauNuclearCrossSection.hh" |
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| 98 | #include "G4QNuMuNuclearCrossSection.hh" |
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| 99 | #include "G4QANuMuNuclearCrossSection.hh" |
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| 100 | #include "G4QNuENuclearCrossSection.hh" |
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| 101 | #include "G4QANuENuclearCrossSection.hh" |
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| 102 | #include "G4QNuNuNuclearCrossSection.hh" |
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| 103 | #include "G4QANuANuNuclearCrossSection.hh" |
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| 104 | //#include "G4QuasmonString.hh" |
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| 105 | #include "G4QuasiFreeRatios.hh" |
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| 106 | #include "G4QPDGToG4Particle.hh" |
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| 107 | #include <vector> |
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| 108 | |
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| 109 | class G4QCollision : public G4VDiscreteProcess |
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| 110 | { |
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| 111 | public: |
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| 112 | |
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| 113 | // Constructor |
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| 114 | G4QCollision(const G4String& processName ="CHIPSNuclearCollision"); |
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| 115 | |
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| 116 | // Destructor |
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| 117 | ~G4QCollision(); |
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| 118 | |
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| 119 | G4bool IsApplicable(const G4ParticleDefinition& particle); |
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| 120 | |
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| 121 | G4double GetMeanFreePath(const G4Track& aTrack, G4double previousStepSize, |
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| 122 | G4ForceCondition* condition); |
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| 123 | // It returns the MeanFreePath of the process for the current track : |
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| 124 | // (energy, material) |
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| 125 | // The previousStepSize and G4ForceCondition* are not used. |
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| 126 | // This function overloads a virtual function of the base class. |
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| 127 | // It is invoked by the ProcessManager of the Particle. |
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| 128 | |
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| 129 | |
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| 130 | G4VParticleChange* PostStepDoIt(const G4Track& aTrack, const G4Step& aStep); |
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| 131 | // It computes the final state of the process (at end of step), |
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| 132 | // returned as a ParticleChange object. |
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| 133 | // This function overloads a virtual function of the base class. |
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| 134 | // It is invoked by the ProcessManager of the Particle. |
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| 135 | |
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| 136 | // Fake void functions |
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| 137 | void SetPhysicsTableBining(G4double, G4double, G4int) {;} |
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| 138 | void BuildPhysicsTable(const G4ParticleDefinition&) {;} |
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| 139 | void PrintInfoDefinition() {;} |
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| 140 | |
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| 141 | // Internal Energy-Momentum Residual |
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| 142 | G4LorentzVector GetEnegryMomentumConservation(); |
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| 143 | |
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| 144 | // Number of neutrons in the target nucleus (primary) |
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| 145 | G4int GetNumberOfNeutronsInTarget(); |
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| 146 | |
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| 147 | // Static functions --------------------------------------------------------------------- |
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| 148 | static void SetManual(); |
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| 149 | static void SetStandard(); |
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| 150 | static void SetParameters(G4double temper=180., G4double ssin2g=.1, G4double etaetap=.3, |
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| 151 | G4double fN=0., G4double fD=0., G4double cP=1., G4double mR=1., |
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| 152 | G4int npCHIPSWorld=234, G4double solAn=.5, G4bool efFlag=false, |
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| 153 | G4double piTh=141.4,G4double mpi2=20000.,G4double dinum=1880.); |
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| 154 | static void SetPhotNucBias(G4double phnB=1.); |
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| 155 | static void SetWeakNucBias(G4double ccnB=1.); |
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| 156 | //--- End of static member functions ---------------------------------------------------- |
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| 157 | |
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| 158 | G4double GetPhotNucBias(){return photNucBias;} |
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| 159 | G4double GetWeakNucBias(){return weakNucBias;} |
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| 160 | |
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| 161 | private: |
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| 162 | |
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| 163 | // Hide assignment operator as private |
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| 164 | G4QCollision& operator=(const G4QCollision &right); |
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| 165 | |
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| 166 | // Copy constructor |
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| 167 | G4QCollision(const G4QCollision&); |
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| 168 | |
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| 169 | // Random direction in two dimentions pair(first=sin(phi), second=cos(phi)) |
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| 170 | std::pair<G4double,G4double> Random2DDirection(); |
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| 171 | |
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| 172 | // BODY |
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| 173 | // Static Parameters -------------------------------------------------------------------- |
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| 174 | static G4bool manualFlag; // If false then standard parameters are used |
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| 175 | static G4int nPartCWorld; // The#of particles for hadronization (limit of A of fragm.) |
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| 176 | // -> Parameters of the G4Quasmon class: |
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| 177 | static G4double Temperature; // Quasmon Temperature |
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| 178 | static G4double SSin2Gluons; // Percent of ssbar sea in a constituen gluon |
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| 179 | static G4double EtaEtaprime; // Part of eta-prime in all etas |
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| 180 | // -> Parameters of the G4QNucleus class: |
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| 181 | static G4double freeNuc; // probability of the quasi-free baryon on surface |
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| 182 | static G4double freeDib; // probability of the quasi-free dibaryon on surface |
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| 183 | static G4double clustProb; // clusterization probability in dense region |
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| 184 | static G4double mediRatio; // relative vacuum hadronization probability |
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| 185 | // -> Parameters of the G4QEnvironment class: |
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| 186 | static G4bool EnergyFlux; // Flag for Energy Flux use instead of Multy Quasmon |
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| 187 | static G4double SolidAngle; // Part of Solid Angle to capture secondaries(@@A-dep) |
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| 188 | static G4double PiPrThresh; // Pion Production Threshold for gammas |
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| 189 | static G4double M2ShiftVir; // Shift for M2=-Q2=m_pi^2 of the virtual gamma |
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| 190 | static G4double DiNuclMass; // Double Nucleon Mass for virtual normalization |
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| 191 | // -> Biasing parameters: |
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| 192 | static G4double photNucBias; // Biasing parameter for photo-($e,mu,tau)Nuclear reactions |
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| 193 | static G4double weakNucBias; // Biasing parameter for Charged Currents (nu,mu) reactions |
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| 194 | //--------------------------------- End of static parameters --------------------------- |
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| 195 | // Working parameters |
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| 196 | G4VQCrossSection* theCS; |
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| 197 | G4LorentzVector EnMomConservation; // Residual of Energy/Momentum Cons. |
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| 198 | G4int nOfNeutrons; // #of neutrons in the target nucleus |
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| 199 | |
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| 200 | // Modifires for the reaction |
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| 201 | G4double Time; // Time shift of the capture reaction |
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| 202 | G4double EnergyDeposition; // Energy deposited in the reaction |
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| 203 | static std::vector <G4int> ElementZ; // Z of the element(i) in theLastCalc |
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| 204 | static std::vector <G4double> ElProbInMat; // SumProbabilityElements in Material |
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| 205 | static std::vector <std::vector<G4int>*> ElIsoN; // N of isotope(j) of Element(i) |
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| 206 | static std::vector <std::vector<G4double>*> IsoProbInEl;// SumProbabIsotopes in Element i |
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| 207 | }; |
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| 208 | #endif |
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| 209 | |
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