Search for electron antineutrino appearance in a long-baseline muon antineutrino beam

T2K Collaboration

Research output: Contribution to journalArticlepeer-review

Abstract

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 2.40σ 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.

Original languageEnglish
JournalUnknown Journal
Publication statusPublished - Nov 14 2019

ASJC Scopus subject areas

  • General

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