Four Neutrino Mass Spectra at the Neutrino Factory

Abstract

We study the physical reach of a Neutrino Factory in the 2+2 and 3+1 Four Neutrino mixing scenarios, with similar results for the sensitivity to the mixing angles. Huge CP-violating effects can be observed in both schemes with a near, O(10) Km, detector of O(10) Kton size in the $ν_μ\to ν_τ$ channel. A smaller detector of 1 Kton size can still observe very large effects in this channel.

4 Latex pages and 2 figs;talk presented at the XXXVI Rencontres de Moriond on ElectroWeak and Grand Unified Theories, 10-17 March 2001, Les Arcs