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G4StokesVector.hh
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25 //
26 //
27 // GEANT4 Class header file
28 //
29 // File name: G4StokesVector
30 //
31 // Author: Andreas Schaelicke
32 //
33 // Creation date: 01.05.2005
34 //
35 // Modifications:
36 // 27-07-06 added some test routines (P.Starovoitov)
37 // 25-08-06 modified name of test routines (A.Schaelicke)
38 //
39 // Class Description:
40 //
41 // Provides Stokesvector representation employed in implementation of
42 // polarized processes.
43 //
44 // aim:
45 // - store three components of a stokesvector
46 // - distinguish between boson or fermion state (different transformations)
47 // - provide unique definition of reference frame (cf. G4PolarizationHelper)
48 //
49 
50 #ifndef G4StokesVector_h
51 #define G4StokesVector_h 1
52 
53 #include "G4ThreeVector.hh"
54 #include "G4RotationMatrix.hh"
55 
56 
58 {
59  public:
60  // standard vectors:
61  static const G4StokesVector ZERO;
62  static const G4StokesVector P1;
63  static const G4StokesVector P2;
64  static const G4StokesVector P3;
65  static const G4StokesVector M1;
66  static const G4StokesVector M2;
67  static const G4StokesVector M3;
68 public:
71  ~G4StokesVector() = default;
72 
73  G4bool IsZero() const;
74 
75  inline G4double p1() const { return x(); }
76  inline G4double p2() const { return y(); }
77  inline G4double p3() const { return z(); }
78 
79  inline G4double Transverse() const { return perp(); }
80 
81  inline G4ThreeVector PolSqr() const {
82  return G4ThreeVector(x()*x(),y()*y(),z()*z());
83  }
84  inline G4ThreeVector PolSqrt() const {
85  return G4ThreeVector(std::sqrt(x()),std::sqrt(y()),std::sqrt(z()));
86  }
87  G4ThreeVector PolError(const G4StokesVector & sum2, long n);
88 
89  // Ratio of 3-vectors.
91 
92  inline void SetPhoton() { isPhoton=true; }
93 
94  void RotateAz(G4ThreeVector nInteractionFrame,
95  G4ThreeVector particleDirection);
96  void InvRotateAz(G4ThreeVector nInteractionFrame,
97  G4ThreeVector particleDirection);
98  void RotateAz(G4double cosphi, G4double sinphi);
99  G4double GetBeta();
100 
101  void DiceUniform();
102  void DiceP1();
103  void DiceP2();
104  void DiceP3();
105 
106  void FlipP3();
107 private:
109 };
110 
111 
112 #endif