Final neutrino oscillation results from LSND

Physics

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Neutrino Mass And Mixing, Neutrino Interactions, Decays Of Muons

Scientific paper

The LSND experiment at Los Alamos has conducted searches for νμ-->νe oscillations using νμ from μ+ decay at rest and for νμ-->νe oscillations using νμ from π+ decay in flight. For the νμ-->νe search, a total excess of 83.3+/-21.2+/-12.0 events is observed with e+ energy between 20 and 60 MeV, while for the νμ-->νe search, a total excess of 18.1+/-6.6+/-4.0 events is observed with e- energy between 60 and 200 MeV. If attributed to neutrino oscillations, the most favored allowed region from a fit to the entire data sample is a band from 0.2 to 2.0 eV2. This result implies that at least one neutrino has a mass greater than 0.4 eV/c2 and that neutrinos contribute more than 1% to the mass of the universe. .

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