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Phys. Rev. Lett. 103, 111801 (2009) [5 pages]

Search for Electron Antineutrino Appearance at the Deltam2~1 eV2 Scale

A. A. Aguilar-Arevalo,12 C. E. Anderson,15 S. J. Brice,5 B. C. Brown,5 L. Bugel,4 J. M. Conrad,11 Z. Djurcic,4 B. T. Fleming,15 R. Ford,5 F. G. Garcia,5 G. T. Garvey,9 J. Gonzales,9 J. Grange,6 C. Green,5,9 J. A. Green,8,9 R. Imlay,10 R. A. Johnson,2 G. Karagiorgi,11 T. Katori,8,11 T. Kobilarcik,5 S. K. Linden,15 W. C. Louis,9 K. B. M. Mahn,4 W. Marsh,5 C. Mauger,9 V. T. McGary,11 W. Metcalf,10 G. B. Mills,9 C. D. Moore,5 J. Mousseau,6 R. H. Nelson,3 P. Nienaber,14 J. A. Nowak,10 B. Osmanov,6 Z. Pavlovic,9 D. Perevalov,1 C. C. Polly,7,8 H. Ray,6,9 B. P. Roe,13 A. D. Russell,5 M. H. Shaevitz,4 M. Sorel,4 J. Spitz,15 I. Stancu,1 R. J. Stefanski,5 R. Tayloe,8 M. Tzanov,3 R. G. Van de Water,9 M. O. Wascko,10 D. H. White,9 M. J. Wilking,3 G. P. Zeller,4,9 and E. D. Zimmerman3

(MiniBooNE Collaboration)

1University of Alabama, Tuscaloosa, Alabama 35487, USA
2University of Cincinnati, Cincinnati, Ohio 45221, USA
3University of Colorado, Boulder, Colorado 80309, USA
4Columbia University, New York, New York 10027, USA
5Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
6University of Florida, Gainesville, Florida 32611, USA
7University of Illinois, Urbana, Illinois 61801, USA
8Indiana University, Bloomington, Indiana 47405, USA
9Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
10Louisiana State University, Baton Rouge, Louisiana 70803, USA
11Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
12Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Distrito Federal 04510, México
13University of Michigan, Ann Arbor, Michigan 48109, USA
14Saint Mary's University of Minnesota, Winona, Minnesota 55987, USA
15Yale University, New Haven, Connecticut 06520, USA

Received 13 April 2009; published 11 September 2009

The MiniBooNE Collaboration reports initial results from a search for [overline  nu ]µ-->[overline  nu ]e oscillations. A signal-blind analysis was performed using a data sample corresponding to 3.39×1020 protons on target. The data are consistent with background prediction across the full range of neutrino energy reconstructed assuming quasielastic scattering, 200<E<sub>nu</sub><sup>QE</sup><3000 MeV: 144 electronlike events have been observed in this energy range, compared to an expectation of 139.2±17.6 events. No significant excess of events has been observed, both at low energy, 200–475 MeV, and at high energy, 475–1250 MeV. The data are inconclusive with respect to antineutrino oscillations suggested by data from the Liquid Scintillator Neutrino Detector at Los Alamos National Laboratory.

©2009 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.103.111801
DOI: 10.1103/PhysRevLett.103.111801
PACS: 14.60.Lm; 14.60.Pq; 14.60.St
  • 14.60.Lm
    Ordinary neutrinos (νe, νμ, ντ)
  • 14.60.Pq
    Neutrino mass and mixing
  • 14.60.St
    Non-standard-model neutrinos, right-handed neutrinos, etc.
  • YEAR: 2009

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