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Search for Electron Antineutrino Appearance in a Long-Baseline Muon Antineutrino Beam

Autor
Posiadała-Zezula, Magdalena
Dunne, P.
Eklund, L.
Emery-Schrenk, S.
Ereditato, A.
Fernandez, P.
Feusels, T.
Finch, A. J.
Fiorentini, G. A.
Drapier, O.
Data publikacji
2020
Abstrakt (EN)

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.

Dyscyplina PBN
nauki fizyczne
Czasopismo
Physical Review Letters
Tom
124
Zeszyt
16
ISSN
0031-9007
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