Literature DB >> 21231096

Event excess in the MiniBooNE search for ¯νμ→¯νe oscillations.

A A Aguilar-Arevalo1, C E Anderson, S J Brice, B C Brown, L Bugel, J M Conrad, R Dharmapalan, Z Djurcic, B T Fleming, R Ford, F G Garcia, G T Garvey, J Mirabal, J Grange, J A Green, R Imlay, R A Johnson, G Karagiorgi, T Katori, T Kobilarcik, S K Linden, W C Louis, K B M Mahn, W Marsh, C Mauger, W Metcalf, G B Mills, C D Moore, J Mousseau, R H Nelson, V Nguyen, P Nienaber, J A Nowak, B Osmanov, Z Pavlovic, D Perevalov, C C Polly, H Ray, B P Roe, A D Russell, R Schirato, M H Shaevitz, M Sorel, J Spitz, I Stancu, R J Stefanski, R Tayloe, M Tzanov, R G Van de Water, M O Wascko, D H White, M J Wilking, G P Zeller, E D Zimmerman.   

Abstract

The MiniBooNE experiment at Fermilab reports results from a search for ¯ν_{μ}→¯ν_{e} oscillations, using a data sample corresponding to 5.66×10²⁰ protons on target. An excess of 20.9±14.0 events is observed in the energy range 475<E_{ν}^{QE}<1250  MeV, which, when constrained by the observed ¯ν_{μ} events, has a probability for consistency with the background-only hypothesis of 0.5%. On the other hand, fitting for ¯ν_{μ}→¯ν_{e} oscillations, the best-fit point has a χ² probability of 8.7%. The data are consistent with ¯ν_{μ}→¯ν_{e} oscillations in the 0.1 to 1.0  eV² Δm² range and with the evidence for antineutrino oscillations from the Liquid Scintillator Neutrino Detector at Los Alamos National Laboratory.

Year:  2010        PMID: 21231096     DOI: 10.1103/PhysRevLett.105.181801

Source DB:  PubMed          Journal:  Phys Rev Lett        ISSN: 0031-9007            Impact factor:   9.161


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