MACRO results on atmospheric neutrinos

Details MACRO results on atmospheric neutrinos MACRO results on atmospheric neutrinos

2005-04-16

arxiv.org/abs/hep-ex/0504029v2

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, 6 figures. Paper presented at the NOW 2004 Workshop, Conca Specchiulla, Otranto, Italy, September 2004

Scientific paper

We discuss the final results of the MACRO experiment on atmospheric neutrino oscillations. The data concern event topologies with average neutrino energies of ~3 and ~50 GeV. Multiple Coulomb Scattering of the high energy muons was used to estimate the neutrino energy event by event. The angular distributions, the L/E_nu distribution, the particle ratios and the absolute fluxes all favor nu_mu --> nu_tau oscillations with maximal mixing and Delta m^2 ~0.0023 eV^2. Emphasis is given to measured ratios which are not affected by Monte Carlo (MC) absolute normalization; a discussion is made on MC uncertainties. A preliminary search for possible Lorentz invariance violation contributions to atmospheric neutrino oscillations is presented and discussed.

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