Evidence for Neutrino Oscillations from the Observation of Electron Anti-neutrinos in a Muon Anti-Neutrino Beam
A. Aguilar, L.B. Auerbach, R.L. Burman, D.O. Caldwell, E.D. Church,, A.K. Cochran, J.B. Donahue, A. Fazely, G.T. Garvey, R.M. Gunasingha, R., Imlay, W.C. Louis, R. Majkic, A. Malik, W. Metcalf, G.B. Mills, V. Sandberg,, D. Smith, I. Stancu, M. Sung, R. Tayloe, G.J. VanDalen

TL;DR
This paper reports evidence of neutrino oscillations based on the observation of electron anti-neutrinos in a muon anti-neutrino beam, supporting the existence of neutrino mass differences in the 0.2-10 eV^2 range.
Contribution
First experimental evidence of muon anti-neutrino to electron anti-neutrino oscillations using a liquid scintillator detector at Los Alamos.
Findings
87.9 +/- 22.4 +/- 6.0 excess events observed
Oscillation probability of 0.264 +/- 0.067 +/- 0.045
Supports neutrino mass > 0.4 eV/c^2
Abstract
A search for muon anti-neutrino to electron anti-neutrino oscillations was conducted by the Liquid Scintillator Neutrino Detector at the Los Alamos Neutron Science Center using muon anti-neutrinos from positive muon decay at rest. A total excess of 87.9 +/- 22.4 +/- 6.0 events consistent with electron anti-neutrino plus proton scattering to positron plus neutron was observed above the expected background. This excess corresponds to an oscillation probability of (0.264 +/- 0.067 +/- 0.045), which is consistent with an earlier analysis. In conjunction with other known limits on neutrino oscillations, the LSND data suggest that neutrino oscillations occur in the 0.2-10 eV^2/c^4 Delta-m^2 range, indicating a neutrino mass greater than 0.4 eV/c^2.
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