Unexplained Excess of Electronlike Events from a 1-GeV Neutrino Beam
Author(s)Nguyen, Vy T.; Monroe, Jocelyn; Karagiorgi, Georgia Stelios; Conrad, Janet
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The MiniBooNE Collaboration observes unexplained electronlike events in the reconstructed neutrino energy range from 200 to 475 MeV. With 6.46×10[superscript 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 ν[subscript e] and ν[over-bar][subscript e] charged-current scattering or ν[subscript 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.
DepartmentMassachusetts Institute of Technology. Department of Physics
Physical Review Letters
American Physical Society
MiniBooNE Collaboration et al. “Unexplained Excess of Electronlike Events from a 1-GeV Neutrino Beam.” Physical Review Letters 102.10 (2009): 101802. © 2009 American Physical Society.
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