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Geant4/processes/electromagnetic/polarisation/include/G4PolarizedIonisationBhabhaXS.hh

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 25 //
 26 // Geant4 class file
 27 //
 28 // File name:     G4PolarizedIonisationBhabhaXS
 29 //
 30 // Author:        Andreas Schaelicke and Pavel Starovoitov
 31 //
 32 // Class Description:
 33 //   * calculates the differential cross section (ME squared, without phase
 34 //     space)
 35 //   * incoming positron (along positive z direction) scatters at an electron at
 36 //     rest
 37 //   * phi denotes the angle between the scattering plane and the incoming PRF
 38 //     X-axis
 39 //   * all stokes vectors refer to spins in the Global System (X,Y,Z)
 40 
 41 #ifndef G4PolarizedIonisationBhabhaXS_h
 42 #define G4PolarizedIonisationBhabhaXS_h 1
 43 
 44 #include "G4StokesVector.hh"
 45 #include "G4VPolarizedXS.hh"
 46 
 47 class G4PolarizedIonisationBhabhaXS : public G4VPolarizedXS
 48 {
 49  public:
 50   G4PolarizedIonisationBhabhaXS();
 51   ~G4PolarizedIonisationBhabhaXS() override;
 52 
 53   void Initialize(G4double x, G4double y, G4double phi,
 54                   const G4StokesVector& p0, const G4StokesVector& p1,
 55                   G4int flag = 0) override;
 56 
 57   G4double XSection(const G4StokesVector& pol2,
 58                     const G4StokesVector& pol3) override;
 59   G4double TotalXSection(G4double xmin, G4double xmax, G4double y,
 60                          const G4StokesVector& pol0,
 61                          const G4StokesVector& pol1) override;
 62 
 63   // return expected mean polarisation
 64   G4StokesVector GetPol2() override;
 65   G4StokesVector GetPol3() override;
 66 
 67   G4PolarizedIonisationBhabhaXS& operator                             =(
 68     const G4PolarizedIonisationBhabhaXS& right) = delete;
 69   G4PolarizedIonisationBhabhaXS(const G4PolarizedIonisationBhabhaXS&) = delete;
 70 
 71  private:
 72   // - part depending on the polarization of the final positron
 73   G4ThreeVector fPhi2;
 74   // - part depending on the polarization of the final electron
 75   G4ThreeVector fPhi3;
 76 
 77   G4double fPhi0;
 78 };
 79 #endif
 80