%0 Journal Article
%T Search for Electron Antineutrino Appearance in a Long-Baseline Muon Antineutrino Beam
%A T2K Collaboration (Abe, K. et al
%A Antonova, M.
%A Cervera-Villanueva, A.
%A Fernandez, P.
%A Izmaylov, A.
%A Novella, P.
%J Physical Review Letters
%D 2020
%V 124
%N 16
%I Amer Physical Soc
%@ 0031-9007
%G English
%F T2KCollaborationAbe_etal2020
%O WOS:000527135200004
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4379), last updated on Tue, 05 May 2020 15:12:58 +0000
%X 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 Pontecorvo-Maki-Nakagawa-Sakata (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 2.40s 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.
%R 10.1103/PhysRevLett.124.161802
%U https://arxiv.org/abs/1911.07283
%U https://doi.org/10.1103/PhysRevLett.124.161802
%P 161802-8pp