CP and T asymmetries in neutrino oscillations, in vacuum as well as in matter, are expressed in terms of invariant functions of lepton mass matrices.
The Role of Invariant Functions in Understanding Masses and Mixings
On Invariants of Quark and Lepton Mass Matrices in the Standard Model
CP and T Violation in Neutrino Oscillations and Invariance of Jarlskog's Determinant to Matter Effects
