Masses and mixings from neutrino beams pointing to neutrino telescopes

Abstract We discuss the potential to determine leading oscillation parameters, the value and the sign of Δm 2 31 , as well as the magnitude of sin 2 2θ 13 using a conventional wide band neutrino beam pointing to water or ice Cherenkov neutrino detectors known as “neutrino telescopes”. We find that precision measurements of Δm 2 31 and θ 23 are possible and that, even though it is not possible to discriminate between charges in the detector, there is a remarkably good sensitivity to the mixing angle θ 13 and the sign of Δm 2 31 .