TY  - JOUR
AU  - T2K Collaboration (Abe, K. et al
AU  - Antonova, M.
AU  - Cervera-Villanueva, A.
AU  - Fernandez, P.
AU  - Izmaylov, A.
AU  - Novella, P.
PY  - 2020
DA  - 2020//
TI  - Search for Electron Antineutrino Appearance in a Long-Baseline Muon Antineutrino Beam
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 161802
EP  - 8pp
VL  - 124
IS  - 16
PB  - Amer Physical Soc
AB  - 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.
SN  - 0031-9007
UR  - https://arxiv.org/abs/1911.07283
UR  - https://doi.org/10.1103/PhysRevLett.124.161802
DO  - 10.1103/PhysRevLett.124.161802
LA  - English
N1  - WOS:000527135200004
ID  - T2KCollaborationAbe_etal2020
ER  -