New MACRO results on atmospheric neutrino oscillations
G. Giacomelli, A. Margiotta
Abstract
The final results of the MACRO experiment on atmospheric neutrino oscillations are presented and discussed. The data concern different event topologies with average neutrino energies of ~3 and ~50 GeV. Multiple Coulomb Scattering of the high energy muons in absorbers was used to estimate the neutrino energy of each event. The angular distributions, the L/Enu distribution, the particle ratios and the absolute fluxes all favour numu --> nutau oscillations with maximal mixing and Delta m2 =0.0023 eV2. A discussion is made on the Monte Carlos used for the atmospheric neutrino flux. Some results on neutrino astrophysics are also briefly discussed.
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