Unexplained Excess of Electronlike Events from a 1-GeV Neutrino Beam

Journal Article · Fri Mar 13 00:00:00 EDT 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.102.101802· OSTI ID:21180276

Aguilar-Arevalo, A A; Bugel, L; Coney, L; Djurcic, Z; Mahn, K B. M.; Schmitz, D; Shaevitz, M H; Sorel, M ^[1]; Anderson, C E; Curioni, A; Fleming, B T; Linden, S K; Sodeberg, M ^[2]; Bazarko, A O; Laird, E M; Meyers, P D; Patterson, R B; Shoemaker, F C; Tanaka, H A ^[3]; Brice, S J ^[4]

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1. Columbia University, New York, New York 10027 (United States)
2. Yale University, New Haven, Connecticut 06520 (United States)
3. Princeton University, Princeton, New Jersey 08544 (United States)
4. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)

The MiniBooNE Collaboration observes unexplained electronlike events in the reconstructed neutrino energy range from 200 to 475 MeV. With 6.46x10{sup 20} protons on target, 544 electronlike events are observed in this energy range, compared to an expectation of 415.2{+-}43.4 events, corresponding to an excess of 128.8{+-}20.4{+-}38.3 events. The shape of the excess in several kinematic variables is consistent with being due to either {nu}{sub e} and {nu}{sub e} charged-current scattering or {nu}{sub {mu}} neutral-current scattering with a photon in the final state. No significant excess of events is observed in the reconstructed neutrino energy range from 475 to 1250 MeV, where 408 events are observed compared to an expectation of 385.9{+-}35.7 events.

• OSTI ID: 21180276
• Journal Information: Physical Review Letters, Vol. 102, Issue 10; Other Information: DOI: 10.1103/PhysRevLett.102.101802; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHARGED CURRENTS
ELECTRON NEUTRINOS
MEV RANGE 100-1000
MUON NEUTRINOS
NEUTRAL CURRENTS
NEUTRINO BEAMS
PHOTONS
PROTONS
SCATTERING