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//
// --------------------------------------------------------------------
// GEANT4 class header file
//
// Class Description:
// A clipboard for communicating between quantum entangled photons
// from e+ annihilation. Applies only to the two-gamma decay from the
// JP=0- state of e+e-, para-positronium. (This is the dominant process
// in materials such as human tissue, since the ortho-positronium JP=1-
// state, initially more likely, is "picked off" by a near-by electron
// and turned into para-positronium, because it has the much shorter
// meanlife.)
// Also applies to pi zero (JP=0-).
//
// ------------------ G4eplusAnnihilationEntanglementClipBoard ------------------
//
// Author: J.Allison, May 2017
//
// --------------------------------------------------------------------

// This is a concrete class based on G4VEntanglementClipBoard.  Information
// specific to this type of entanglement can be posted here.  See
// G4VEntanglementClipBoard.hh for more detail on how to use this class.

#ifndef G4eplusAnnihilationEntanglementClipBoard_hh
#define G4eplusAnnihilationEntanglementClipBoard_hh

#include "G4VEntanglementClipBoard.hh"

class G4eplusAnnihilationEntanglementClipBoard
: public G4VEntanglementClipBoard
{
public:
  G4eplusAnnihilationEntanglementClipBoard()
  : fComptonCosTheta1(0.)
  , fComptonPhi1(0.)
  {}
  ~G4eplusAnnihilationEntanglementClipBoard() {}

  // Cos(theta) and phi of the first Compton scattering of the first photon
  void SetComptonCosTheta1(G4double cosTheta1) {fComptonCosTheta1 = cosTheta1;}
  void SetComptonPhi1(G4double phi1) {fComptonPhi1 = phi1;}
  G4double GetComptonCosTheta1() const {return fComptonCosTheta1;}
  G4double GetComptonPhi1() const {return fComptonPhi1;}

protected:
  // Cos(theta) and phi of the first Compton scattering of the first photon
  G4double fComptonCosTheta1, fComptonPhi1;
};

#endif