include/Geant4/G4PolarizedIonisationBhabhaXS.hh

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0025 //
0026 // Geant4 class file
0027 //
0028 // File name:     G4PolarizedIonisationBhabhaXS
0029 //
0030 // Author:        Andreas Schaelicke and Pavel Starovoitov
0031 //
0032 // Class Description:
0033 //   * calculates the differential cross section (ME squared, without phase
0034 //     space)
0035 //   * incoming positron (along positive z direction) scatters at an electron at
0036 //     rest
0037 //   * phi denotes the angle between the scattering plane and the incoming PRF
0038 //     X-axis
0039 //   * all stokes vectors refer to spins in the Global System (X,Y,Z)
0040
0041 #ifndef G4PolarizedIonisationBhabhaXS_h
0042 #define G4PolarizedIonisationBhabhaXS_h 1
0043
0044 #include "G4StokesVector.hh"
0045 #include "G4VPolarizedXS.hh"
0046
0047 class G4PolarizedIonisationBhabhaXS : public G4VPolarizedXS
0048 {
0049  public:
0050   G4PolarizedIonisationBhabhaXS();
0051   ~G4PolarizedIonisationBhabhaXS() override;
0052
0053   void Initialize(G4double x, G4double y, G4double phi,
0054                   const G4StokesVector& p0, const G4StokesVector& p1,
0055                   G4int flag = 0) override;
0056
0057   G4double XSection(const G4StokesVector& pol2,
0058                     const G4StokesVector& pol3) override;
0059   G4double TotalXSection(G4double xmin, G4double xmax, G4double y,
0060                          const G4StokesVector& pol0,
0061                          const G4StokesVector& pol1) override;
0062
0063   // return expected mean polarisation
0064   G4StokesVector GetPol2() override;
0065   G4StokesVector GetPol3() override;
0066
0067   G4PolarizedIonisationBhabhaXS& operator                             =(
0068     const G4PolarizedIonisationBhabhaXS& right) = delete;
0069   G4PolarizedIonisationBhabhaXS(const G4PolarizedIonisationBhabhaXS&) = delete;
0070
0071  private:
0072   // - part depending on the polarization of the final positron
0073   G4ThreeVector fPhi2;
0074   // - part depending on the polarization of the final electron
0075   G4ThreeVector fPhi3;
0076
0077   G4double fPhi0;
0078 };
0079 #endif