Lorentz and CPT violation: a simple neutrino-oscillation model

Abstract

We present a three-parameter model for three flavors of massless left-handed neutrinos with Fermi-point splitting and tri-maximal mixing angles. One of these parameters is the T-violating phase \delta, for which the experimental results from K2K and KamLAND appear to favor a nonzero value. Future experiments, in particular MINOS, will be able to test this simple model. Possible implications for neutrino factories are briefly discussed.

Comments: talk at 6th International Workshop on Neutrino Factories and Superbeams (NuFact04), Osaka, Japan, July 2004; v2: published version