SRLorentzVectorAddons.h

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  // Extra utility functions from SRLorentzVectorAddons.h

  // For access as a position vector. For momentum use the member variables
  // directly.
  float T() const {return E;}
  float X() const {return px;}
  float Y() const {return py;}
  float Z() const {return pz;}
  float Mag() const {return sqrt(px*px + py*py + pz*pz);}
  float Beta() const {return Mag()/E;}
  float Gamma() const {return 1/sqrt(1-Beta()*Beta());}

  TVector3 Vect() const {return TVector3(px, py, pz);}