include/Geant4/G4FTFAnnihilation.hh

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0027
0028 #ifndef G4FTFAnnihilation_h
0029 #define G4FTFAnnihilation_h 1
0030
0031 // ------------------------------------------------------------
0032 //      GEANT 4 class header file
0033 //
0034 //      ---------------- G4FTFAnnihilation       --------------
0035 //             by Vladimir Uzhinsky, November 2010.
0036 //          Annihilation used by Fritiof (FTF) model
0037 //              Takes a projectile and a target
0038 //              Produces strings (excited hadrons)
0039 // ------------------------------------------------------------
0040
0041 #include "globals.hh"
0042 #include "G4FTFParameters.hh"
0043 #include "G4ThreeVector.hh"
0044
0045 class G4VSplitableHadron;
0046 class G4ExcitedString;
0047
0048
0049 class G4FTFAnnihilation {
0050   public:
0051     G4FTFAnnihilation();
0052     virtual ~G4FTFAnnihilation();
0053
0054     virtual G4bool Annihilate( G4VSplitableHadron* aPartner,
0055                                G4VSplitableHadron* bPartner,
0056                                G4VSplitableHadron*& AdditionalString,
0057                                G4FTFParameters* theParameters ) const;
0058
0059   private:
0060     G4FTFAnnihilation( const G4FTFAnnihilation& right );
0061     const G4FTFAnnihilation& operator=( const G4FTFAnnihilation& right );
0062     G4bool operator==( const G4FTFAnnihilation& right ) const;
0063     G4bool operator!=( const G4FTFAnnihilation& right ) const;
0064
0065     // The "Annihilate" method uses the following struct and 4 new utility methods:
0066     struct CommonVariables {
0067       G4int AQ[3], Q[3];
0068       G4bool RotateStrings = false;
0069       G4double S = 0.0, SqrtS = 0.0;
0070       G4LorentzVector Pprojectile, Ptarget;
0071       G4LorentzRotation toLab, RandomRotation;
0072     };
0073     G4bool Create3QuarkAntiQuarkStrings( G4VSplitableHadron* aPartner,
0074                                          G4VSplitableHadron* bPartner,
0075                                          G4VSplitableHadron*& AdditionalString,
0076                                          G4FTFParameters* theParameters,
0077                                          CommonVariables& common ) const;
0078     G4int Create1DiquarkAntiDiquarkString( G4VSplitableHadron* aPartner,
0079                                            G4VSplitableHadron* bPartner,
0080                                            CommonVariables& common ) const;
0081     G4int Create2QuarkAntiQuarkStrings( G4VSplitableHadron* aPartner,
0082                                         G4VSplitableHadron* bPartner,
0083                                         G4FTFParameters* theParameters,
0084                                         CommonVariables& common ) const;
0085     G4bool Create1QuarkAntiQuarkString( G4VSplitableHadron* aPartner,
0086                                         G4VSplitableHadron* bPartner,
0087                                         G4FTFParameters* theParameters,
0088                                         CommonVariables& common ) const;
0089
0090     G4ThreeVector GaussianPt( G4double AveragePt2, G4double maxPtSquare ) const;
0091     G4double ChooseX( G4double Alpha, G4double Beta ) const;
0092     void UnpackBaryon( G4int IdPDG, G4int& Q1, G4int& Q2, G4int& Q3 ) const;
0093 };
0094
0095 #endif
0096