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Event Excess in the MiniBooNE Search for ν̅ μ→ν̅ e Oscillations

Author(s)
Bugel, Leonard G.; Karagiorgi, Georgia Stelios; Katori, Teppei; Nguyen, V.; Conrad, Janet Marie
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Alternative title
Event Excess in the MiniBooNE Search for ν̅ μ→ν̅ e [nu overscore subscript mu→nu overscore subscript e]
Terms of use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
The MiniBooNE experiment at Fermilab reports results from a search for ν̅ μ→ν̅ e [nu overscore subscript mu→nu overscore subscript e] oscillations, using a data sample corresponding to 5.66×10 20 [suprscript 20] protons on target. An excess of 20.9±14.0 events is observed in the energy range 475<EνQE [E superscript QE subscript nu] <1250  MeV, which, when constrained by the observed ν̅ μ [nu overscore subscript mu] events, has a probability for consistency with the background-only hypothesis of 0.5%. On the other hand, fitting for ν̅ μ→ν̅ e [nu overscore subscript mu→nu overscore subscript e] oscillations, the best-fit point has a χ2 [X superscript 2] probability of 8.7%. The data are consistent with ν̅ μ→ν̅ e [nu overscore subscript mu→nu overscore subscript e] oscillations in the 0.1 to 1.0  eV2 Δm2 [eV superscript 2 delta m superscript 2] range and with the evidence for antineutrino oscillations from the Liquid Scintillator Neutrino Detector at Los Alamos National Laboratory.
Date issued
2010-10
URI
http://hdl.handle.net/1721.1/62190
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical review letters
Publisher
American Physical Society
Citation
Aguilar-Arevalo, A. et al. “Event Excess in the MiniBooNE Search for ν[over ¯]_{μ}→ν[over ¯]_{e} Oscillations.” Physical Review Letters 105.18 (2010) © 2010 The American Physical Society
Version: Final published version
ISSN
0031-9007

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