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27
28 #ifndef G4FTFAnnihilation_h
29 #define G4FTFAnnihilation_h 1
30
31 // ------------------------------------------------------------
32 // GEANT 4 class header file
33 //
34 // ---------------- G4FTFAnnihilation --------------
35 // by Vladimir Uzhinsky, November 2010.
36 // Annihilation used by Fritiof (FTF) model
37 // Takes a projectile and a target
38 // Produces strings (excited hadrons)
39 // ------------------------------------------------------------
40
41 #include "globals.hh"
42 #include "G4FTFParameters.hh"
43 #include "G4ThreeVector.hh"
44
45 class G4VSplitableHadron;
46 class G4ExcitedString;
47
48
49 class G4FTFAnnihilation {
50 public:
51 G4FTFAnnihilation();
52 virtual ~G4FTFAnnihilation();
53
54 virtual G4bool Annihilate( G4VSplitableHadron* aPartner,
55 G4VSplitableHadron* bPartner,
56 G4VSplitableHadron*& AdditionalString,
57 G4FTFParameters* theParameters ) const;
58
59 private:
60 G4FTFAnnihilation( const G4FTFAnnihilation& right );
61 const G4FTFAnnihilation& operator=( const G4FTFAnnihilation& right );
62 G4bool operator==( const G4FTFAnnihilation& right ) const;
63 G4bool operator!=( const G4FTFAnnihilation& right ) const;
64
65 // The "Annihilate" method uses the following struct and 4 new utility methods:
66 struct CommonVariables {
67 G4int AQ[3], Q[3];
68 G4bool RotateStrings = false;
69 G4double S = 0.0, SqrtS = 0.0;
70 G4LorentzVector Pprojectile, Ptarget;
71 G4LorentzRotation toLab, RandomRotation;
72 };
73 G4bool Create3QuarkAntiQuarkStrings( G4VSplitableHadron* aPartner,
74 G4VSplitableHadron* bPartner,
75 G4VSplitableHadron*& AdditionalString,
76 G4FTFParameters* theParameters,
77 CommonVariables& common ) const;
78 G4int Create1DiquarkAntiDiquarkString( G4VSplitableHadron* aPartner,
79 G4VSplitableHadron* bPartner,
80 CommonVariables& common ) const;
81 G4int Create2QuarkAntiQuarkStrings( G4VSplitableHadron* aPartner,
82 G4VSplitableHadron* bPartner,
83 G4FTFParameters* theParameters,
84 CommonVariables& common ) const;
85 G4bool Create1QuarkAntiQuarkString( G4VSplitableHadron* aPartner,
86 G4VSplitableHadron* bPartner,
87 G4FTFParameters* theParameters,
88 CommonVariables& common ) const;
89
90 G4ThreeVector GaussianPt( G4double AveragePt2, G4double maxPtSquare ) const;
91 G4double ChooseX( G4double Alpha, G4double Beta ) const;
92 void UnpackBaryon( G4int IdPDG, G4int& Q1, G4int& Q2, G4int& Q3 ) const;
93 };
94
95 #endif
96
97