Atmospheric neutrino oscillations from upward throughgoing muon multiple scattering in MACRO

Abstract The energy of atmospheric neutrinosdetected by MACRO was estimated using multiple Coulomb scattering of upward throughgoing muons. This analysis allows a test of atmospheric neutrino oscillations, relying on the distortion of the muonenergy distribution. These results have been combined with those coming from the upward throughgoing muonangular distribution only. Both analyses are independent of the neutrinoflux normalization and provide strong evidence, above the 4 σ level, in favour of neutrino oscillations.