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arxiv 1911.07283 v1 pith:QI25RXQ2 submitted 2019-11-14 hep-ex
Search for Electron Antineutrino Appearance in a Long-baseline Muon Antineutrino Beam
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Electron antineutrino appearance is measured by the T2K experiment in an accelerator-produced antineutrino beam, using additional neutrino beam operation to constrain parameters of the PMNS mixing matrix. T2K observes 15 candidate electron antineutrino events with a background expectation of 9.3 events. Including information from the kinematic distribution of observed events, the hypothesis of no electron antineutrino appearance is disfavored with a significance of 2.40{\sigma} and no discrepancy between data and PMNS predictions is found. A complementary analysis that introduces an additional free parameter which allows non-PMNS values of electron neutrino and antineutrino appearance also finds no discrepancy between data and PMNS predictions.
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Cited by 1 Pith paper
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2020 Global reassessment of the neutrino oscillation picture
hep-ph 2020-06 unverdicted novelty 3.0
Updated global fit of neutrino oscillation data gives precise measurements of mixing parameters with a 2.5 sigma preference for normal mass ordering.
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