Four species neutrino oscillations at ν-Factory: sensitivity and CP-violation

The prospects of measuring the leptonic angles and CP-odd phases at a neutrino factory are discussed in the scenario of three active plus one sterile neutrino. We consider the νμ→νe LSND signal. Its associated large mass difference leads to observable neutrino oscillations at short (∼1 km) baseline experiments. Sensitivities to the leptonic angles down to 10−3 can be easily achieved with a 1 t detector. Longer baseline experiments (∼100 km) with a 1 kt detector can provide very clean tests of CP-violation especially through tau lepton detection.