Atmospheric neutrino oscillations in MACRO
Abstract
In this paper we first give a short overview of the MACRO detector, which was operational at the Gran Sasso Laboratory from 1989 till 2000. Then we present and discuss the results on atmospheric neutrino oscillations, concerning medium (~4 GeV) and high (~50 GeV) energy data. Using the Multiple Coulomb Scattering of muons inside the lower part of the detector, estimates of neutrino energies were made for the high energy sample. The MACRO data, angular distributions, absolute flux and L/Enu distributions favour numu <--> nutau oscillations with maximal mixing and Dm2=2.5 x 10-3 eV2.
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