Sterile neutrinos at a Neutrino Factory

We study the potential of a Neutrino Factory (NF) to constrain the parameters of the (3+1)-scheme with a O(1)eV2 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 νμ→νμ and the νμ→ντ channels which can constrain θ34≤12 deg. (14 deg.) and θ24≤7.5 deg. (8 deg.) with the 50 GeV (20 GeV) NF. We also study the CP-violation in this new context showing that the CP-asymmetries in the νμ→ντ channel can give us the chance to see a clear new CP-violation signal associated with the sterile neutrinos.