Geant4_10
G4SampleResonance.hh
Go to the documentation of this file.
1 //
2 // ********************************************************************
3 // * License and Disclaimer *
4 // * *
5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. *
10 // * *
11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitation of liability. *
17 // * *
18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Software license. *
24 // ********************************************************************
25 //
26 //
27 //
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
const char * p
Definition: xmltok.h:285
tuple x
Definition: test.py:50
#define G4ThreadLocal
Definition: tls.hh:52
std::map< const G4ParticleDefinition *, G4double, std::less< const G4ParticleDefinition * > >::const_iterator minMassMapIterator
G4double GetMinimumMass(const G4ParticleDefinition *p) const
double G4double
Definition: G4Types.hh:76
std::map< const G4ParticleDefinition *, G4double, std::less< const G4ParticleDefinition * > > minMassMapType