Event Excess in the MiniBooNE Search for {nu}{sub {mu}{yields}{nu}e} Oscillations

Journal Article · Fri Oct 29 00:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.105.181801· OSTI ID:21471041

Aguilar-Arevalo, A A ^[1]; Anderson, C E; Fleming, B T; Linden, S K; Spitz, J ^[2]; Brice, S J; Brown, B C; Ford, R; Garcia, F G; Kobilarcik, T; Marsh, W; Moore, C D; Polly, C C; Russell, A D; Stefanski, R J; Zeller, G P ^[3]; Bugel, L; Conrad, J M; Karagiorgi, G; Nguyen, V ^[4]

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1. Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, D.F. 04510 (Mexico)
2. Yale University, New Haven, Connecticut 06520 (United States)
3. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
4. Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

The MiniBooNE experiment at Fermilab reports results from a search for {nu}{sub {mu}{yields}{nu}e} oscillations, using a data sample corresponding to 5.66x10{sup 20} protons on target. An excess of 20.9{+-}14.0 events is observed in the energy range 475<E{sub {nu}}{sup QE}<1250 MeV, which, when constrained by the observed {nu}{sub {mu}} events, has a probability for consistency with the background-only hypothesis of 0.5%. On the other hand, fitting for {nu}{sub {mu}{yields}{nu}e} oscillations, the best-fit point has a {chi}{sup 2} probability of 8.7%. The data are consistent with {nu}{sub {mu}{yields}{nu}e} oscillations in the 0.1 to 1.0 eV{sup 2} {Delta}m{sup 2} range and with the evidence for antineutrino oscillations from the Liquid Scintillator Neutrino Detector at Los Alamos National Laboratory.

• OSTI ID: 21471041
• Journal Information: Physical Review Letters, Vol. 105, Issue 18; Other Information: DOI: 10.1103/PhysRevLett.105.181801; (c) 2010 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

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