Sterile neutrinos at a Neutrino Factory

摘要

We study the potential of a Neutrino Factory (NF) to constrain the parameters of the (3 + 1)-scheme with a O(1) eV~2 largest mass square difference, considering two set-ups: a NF with 50 GeV (20 GeV) stored muons, with two detectors of the Hybrid-MIND type located at L = 3000 (4000), 7500 km. We show that the best sensitivity to sterile neutrinos can be achieved through the v_μ→v_μ and the v_μ → v_τ channels which can constrain θ_(34) < 12°(14°) and θ_(24) < 7.5°(8°) with the 50 GeV (20 GeV) NE We also study the CP-violation in this new context showing that the CP-asymmetries in the v_μ →channel can give us the chance to see a clear new CP-violation signal associated with the sterile neutrinos.