include/Geant4/G4PolarizationHelper.hh

0001 //
0002 // ********************************************************************
0003 // * License and Disclaimer                                           *
0004 // *                                                                  *
0005 // * The  Geant4 software  is  copyright of the Copyright Holders  of *
0006 // * the Geant4 Collaboration.  It is provided  under  the terms  and *
0007 // * conditions of the Geant4 Software License,  included in the file *
0008 // * LICENSE and available at  http://cern.ch/geant4/license .  These *
0009 // * include a list of copyright holders.                             *
0010 // *                                                                  *
0011 // * Neither the authors of this software system, nor their employing *
0012 // * institutes,nor the agencies providing financial support for this *
0013 // * work  make  any representation or  warranty, express or implied, *
0014 // * regarding  this  software system or assume any liability for its *
0015 // * use.  Please see the license in the file  LICENSE  and URL above *
0016 // * for the full disclaimer and the limitation of liability.         *
0017 // *                                                                  *
0018 // * This  code  implementation is the result of  the  scientific and *
0019 // * technical work of the GEANT4 collaboration.                      *
0020 // * By using,  copying,  modifying or  distributing the software (or *
0021 // * any work based  on the software)  you  agree  to acknowledge its *
0022 // * use  in  resulting  scientific  publications,  and indicate your *
0023 // * acceptance of all terms of the Geant4 Software license.          *
0024 // ********************************************************************
0025 //
0026 // Geant4 Class header file
0027 //
0028 // File name:     G4PolarizationHelper
0029 //
0030 // Author:        Andreas Schaelicke
0031 //
0032 // Class Description:
0033 //   Provides some basic polarization transformation routines.
0034
0035 #ifndef G4PolarizationHelper_h
0036 #define G4PolarizationHelper_h 1
0037
0038 #include "globals.hh"
0039 #include "G4ThreeVector.hh"
0040
0041 class G4PolarizationHelper
0042 {
0043  public:
0044   static G4ThreeVector GetFrame(const G4ThreeVector&, const G4ThreeVector&);
0045   static G4ThreeVector GetParticleFrameX(const G4ThreeVector&);
0046   static G4ThreeVector GetParticleFrameY(const G4ThreeVector&);
0047   static G4ThreeVector GetRandomFrame(const G4ThreeVector&);
0048
0049   static G4ThreeVector GetSpinInPRF(const G4ThreeVector& uZ,
0050                                     const G4ThreeVector& spin);
0051
0052   static void TestPolarizationTransformations();
0053   static void TestInteractionFrame();
0054 };
0055
0056 #endif