Geant4  10.01.p03
G4SampleResonance.hh
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28 
29 #ifndef G4SampleResonance_h
30 #define G4SampleResonance_h 1
31 
32 // ------------------------------------------------------------
33 // GEANT 4 class header file
34 //
35 // ---------------- G4SampleResonance ----------------
36 // by Henning Weber, March 2001.
37 // helper class for sampling resonance masses
38 // ------------------------------------------------------------
39 
40 #include "globals.hh"
41 #include <map>
42 #include "G4ParticleDefinition.hh"
43 
44 
46 {
47 public:
48 
50  G4double SampleMass(const G4double poleMass,
51  const G4double gamma,
52  const G4double minMass,
53  const G4double maxMass) const;
54  G4double SampleMass(const G4ParticleDefinition* p, const G4double maxMass) const;
55 
56 private:
57 
58  G4double BrWigInt0(const G4double x, const G4double gamma, const G4double m0) const
59  { return 2.0*gamma*std::atan( 2.0 * (x-m0)/ gamma ); }
60 
61  G4double BrWigInt1(const G4double x, const G4double gamma, const G4double m0) const
62  { return 0.5*gamma*gamma*std::log( (x-m0)*(x-m0)+gamma*gamma/4.0 ) + m0*BrWigInt0(x,gamma,m0); }
63 
64  G4double BrWigInv(const G4double x, const G4double gamma, const G4double m0) const
65  { return 0.5*gamma*std::tan( 0.5*x/gamma )+m0; }
66 
67 public:
68 
69  typedef std::map<const G4ParticleDefinition*, G4double, std::less<const G4ParticleDefinition*> >::const_iterator minMassMapIterator;
70  typedef std::map<const G4ParticleDefinition*, G4double, std::less<const G4ParticleDefinition*> > minMassMapType;
71 
72 private:
73 
74  static G4ThreadLocal minMassMapType *minMassCache_G4MT_TLS_;
75 
76 };
77 
78 
79 #endif
80 
81 
82 
83 
84 
85 
G4double SampleMass(const G4double poleMass, const G4double gamma, const G4double minMass, const G4double maxMass) const
static G4ThreadLocal minMassMapType * minMassCache_G4MT_TLS_
G4double BrWigInt0(const G4double x, const G4double gamma, const G4double m0) const
G4double BrWigInt1(const G4double x, const G4double gamma, const G4double m0) const
#define G4ThreadLocal
Definition: tls.hh:89
std::map< const G4ParticleDefinition *, G4double, std::less< const G4ParticleDefinition * > >::const_iterator minMassMapIterator
G4double GetMinimumMass(const G4ParticleDefinition *p) const
G4double BrWigInv(const G4double x, const G4double gamma, const G4double m0) const
double G4double
Definition: G4Types.hh:76
std::map< const G4ParticleDefinition *, G4double, std::less< const G4ParticleDefinition * > > minMassMapType