Gabriele Cosmo
103 lines
3.6 KiB
C++
103 lines
3.6 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// Geant4 Class header file
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//
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// File name: G4StokesVector
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//
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// Author: Andreas Schaelicke
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//
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// Class Description:
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// Provides Stokesvector representation employed in implementation of
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// polarized processes.
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// - store three components of a stokesvector
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// - distinguish between boson or fermion state (different transformations)
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// - provide unique definition of reference frame (cf. G4PolarizationHelper)
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#ifndef G4StokesVector_h
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#define G4StokesVector_h 1
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#include "G4ThreeVector.hh"
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#include "G4RotationMatrix.hh"
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class G4StokesVector : public G4ThreeVector
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{
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public:
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G4StokesVector();
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explicit G4StokesVector(const G4ThreeVector& v);
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~G4StokesVector() = default;
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G4bool IsZero() const;
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inline G4double p1() const { return x(); }
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inline G4double p2() const { return y(); }
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inline G4double p3() const { return z(); }
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inline G4double Transverse() const { return perp(); }
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inline G4ThreeVector PolSqr() const
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{
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return G4ThreeVector(x() * x(), y() * y(), z() * z());
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}
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inline G4ThreeVector PolSqrt() const
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{
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return G4ThreeVector(std::sqrt(x()), std::sqrt(y()), std::sqrt(z()));
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}
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G4ThreeVector PolError(const G4StokesVector& sum2, long n);
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// Ratio of 3-vectors.
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G4ThreeVector PolDiv(const G4StokesVector&);
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inline void SetPhoton() { fIsPhoton = true; }
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void RotateAz(G4ThreeVector nInteractionFrame,
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G4ThreeVector particleDirection);
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void InvRotateAz(G4ThreeVector nInteractionFrame,
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G4ThreeVector particleDirection);
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void RotateAz(G4double cosphi, G4double sinphi);
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G4double GetBeta();
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void DiceUniform();
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void DiceP1();
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void DiceP2();
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void DiceP3();
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void FlipP3();
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// standard vectors:
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static const G4StokesVector ZERO;
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static const G4StokesVector P1;
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static const G4StokesVector P2;
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static const G4StokesVector P3;
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static const G4StokesVector M1;
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static const G4StokesVector M2;
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static const G4StokesVector M3;
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private:
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G4bool fIsPhoton;
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};
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#endif
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