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G4VScatteringCollision.hh
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25 //
26 //
27 // -------------------------------------------------------------------
28 // GEANT4 Class file
29 //
30 // For information related to this code contact:
31 //
32 // File name: G4VElasticCollision
33 //
34 // Author: Maria Grazia Pia
35 //
36 // Creation date: 15 April 1999
37 //
38 // Modifications:
39 //
40 // -------------------------------------------------------------------
41 
42 #ifndef G4VSCATTERINGCOLLISION_HH
43 #define G4VSCATTERINGCOLLISION_HH
44 
45 #include "globals.hh"
46 #include "G4Log.hh"
47 #include "G4VCollision.hh"
48 #include "G4VCrossSectionSource.hh"
50 #include "G4KineticTrackVector.hh"
51 
52 class G4KineticTrack;
53 
54 
56 {
57 
58 public:
59 
62  virtual ~G4VScatteringCollision();
63 
65  G4bool operator!=(const G4VScatteringCollision &right) const;
66 
67  virtual G4KineticTrackVector* FinalState(const G4KineticTrack& trk1,
68  const G4KineticTrack& trk2) const;
70  {
72  }
73 
74 private:
77 
78 protected:
79 
80  virtual const std::vector<const G4ParticleDefinition*> & GetOutgoingParticles() const = 0;
81 
82 private:
83 
84  double BrWigInt0(const double x, const double gamma, const double m0) const
85  { return 2.0*gamma*std::atan( 2.0 * (x-m0)/ gamma ); }
86 
87  G4double BrWigInt1(const G4double x, const G4double gamma, const G4double m0) const
88  { return 0.5*gamma*gamma*G4Log( (x-m0)*(x-m0)+gamma*gamma/4.0 ) + m0*BrWigInt0(x,gamma,m0); }
89 
90  double BrWigInv(const double x, const double gamma, const double m0) const
91  { return 0.5*gamma*std::tan( 0.5*x/gamma )+m0; }
92 
93  double SampleResonanceMass(const double poleMass,
94  const double width,
95  const double minMass,
96  const double maxMass) const;
97 private:
98 
100 
101 };
102 
103 
104 
105 
106 #endif