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G4DiffractiveExcitation.hh
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27 
28 #ifndef G4DiffractiveExcitation_h
29 #define G4DiffractiveExcitation_h 1
30 
31 // ------------------------------------------------------------
32 // GEANT 4 class header file
33 //
34 // ---------------- G4DiffractiveExcitation --------------
35 // by Gunter Folger, October 1998.
36 // diffractive Excitation used by strings models
37 // Take a projectile and a target
38 // excite the projectile and target
39 // ------------------------------------------------------------
40 
41 #include "globals.hh"
42 #include "G4FTFParameters.hh"
43 #include "G4ElasticHNScattering.hh"
44 #include "G4ThreeVector.hh"
45 #include "G4LorentzVector.hh"
46 #include "G4LorentzRotation.hh"
47 
48 class G4VSplitableHadron;
49 class G4ExcitedString;
50 
51 
53  public:
55  virtual ~G4DiffractiveExcitation();
56 
57  virtual G4bool ExciteParticipants( G4VSplitableHadron* aPartner,
58  G4VSplitableHadron* bPartner,
59  G4FTFParameters* theParameters,
60  G4ElasticHNScattering* theElastic ) const;
61 
62  virtual void CreateStrings( G4VSplitableHadron* aHadron,
63  G4bool isProjectile,
64  G4ExcitedString*& FirstString,
65  G4ExcitedString*& SecondString,
66  G4FTFParameters* theParameters ) const;
67 
68  private:
71  G4bool operator==( const G4DiffractiveExcitation& right ) const;
72  G4bool operator!=( const G4DiffractiveExcitation& right ) const;
73 
74  G4double LambdaF(G4double sqrM, G4double sqrM1, G4double sqrM2) const;
75 
76  G4ThreeVector GaussianPt( G4double AveragePt2, G4double maxPtSquare ) const;
77  G4double ChooseP( G4double Pmin, G4double Pmax ) const;
79  void UnpackMeson( G4int IdPDG, G4int& Q1, G4int& Q2 ) const;
80  void UnpackBaryon( G4int IdPDG, G4int& Q1, G4int& Q2, G4int& Q3 ) const;
81  G4int NewNucleonId( G4int Q1, G4int Q2, G4int Q3 ) const;
82 
83  // The "ExciteParticipants" method uses the following struct and 3 new utility methods:
84  struct CommonVariables {
87  G4double M0projectile = 0.0, M0projectile2 = 0.0, M0target = 0.0, M0target2 = 0.0,
88  ProjMassT = 0.0, ProjMassT2 = 0.0, TargMassT = 0.0, TargMassT2 = 0.0,
89  MminProjectile = 0.0, MminTarget = 0.0,
94  S = 0.0, SqrtS = 0.0, Pt2 = 0.0, PZcms = 0.0, PZcms2 = 0.0,
95  AveragePt2 = 0.0, maxPtSquare = 0.0,
96  ProbExc = 0.0, Qminus = 0.0, Qplus = 0.0,
97  PMinusNew = 0.0, PPlusNew = 0.0, TMinusNew = 0.0, TPlusNew = 0.0,
98  PMinusMin = 0.0, PMinusMax = 0.0, TPlusMin = 0.0, TPlusMax = 0.0,
103  };
106  G4FTFParameters* theParameters,
107  G4ElasticHNScattering* theElastic,
108  CommonVariables& common ) const;
111  G4FTFParameters* theParameters,
112  CommonVariables& common ) const;
115  G4FTFParameters* theParameters,
116  CommonVariables& common ) const;
117 };
118 
119 #endif
120