void GetMeasurement( const Double_t XYZ[], Double_t m[], Double_t V[] ) const ;
Double_t fP[8]; //* Main particle parameters {X,Y,Z,Px,Py,Pz,E,S[=DecayLength/P]}
void GetMeasurement( const Double_t XYZ[], Double_t m[], Double_t V[] ) const ;
Double_t fP[8]; //* Main particle parameters {X,Y,Z,Px,Py,Pz,E,S[=DecayLength/P]}