- Float_t fAlpha; // azimuthal angle of reference frame
- Float_t fX; // x: radial distance
- Float_t fY; // local Y-coordinate of a track (cm)
- Float_t fZ; // local Z-coordinate of a track (cm)
- Float_t fSnp; // local sine of the track momentum azimuthal angle
- Float_t fTgl; // tangent of the track momentum dip angle
- Float_t fSigned1Pt; // 1/pt (1/(GeV/c))
- Float_t fC[15]; // covariance matrix