Rephasing Invariants of CP and T Violation in the Four-Neutrino Mixing Models

Abstract

We calculate the rephasing invariants of CP and T violation in a favorable parametrization of the 4x4 lepton flavor mixing matrix. Their relations with the CP- and T-violating asymmetries in neutrino oscillations are derived, and the matter effects are briefly discussed.

Comments: RevTex 9 pages. Slight changes. Phys. Rev. D (in press)