Expanding neutrino oscillation parameter measurements in NOvA using a Bayesian approach

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Authors
Acero, Mario A.
Acharya, B.
Adamson, P.
Anfimov, Nikolay V.
Antoshkin, A.
Arrieta-Diaz, E.
Asquith, L.
Aurisano, A.
Back, A.
Balashov, N.
Advisors
Issue Date
2024
Type
Article
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Research Projects
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Citation
Acero, M.A., et. al. (NOvA collaboration). Expanding neutrino oscillation parameter measurements in NOvA using a Bayesian approach. (2024). Physical Review D, 110 (1), art. no. 012005. DOI: 10.1103/PhysRevD.110.012005
Abstract

NOvA is a long-baseline neutrino oscillation experiment that measures oscillations in charged-current νμ→νμ (disappearance) and νμ→νe (appearance) channels, and their antineutrino counterparts, using neutrinos of energies around 2 GeV over a distance of 810 km. In this work we reanalyze the dataset first examined in our previous paper [Phys. Rev. D 106, 032004 (2022)PRVDAQ2470-001010.1103/PhysRevD.106.032004] using an alternative statistical approach based on Bayesian Markov chain Monte Carlo. We measure oscillation parameters consistent with the previous results. We also extend our inferences to include the first NOvA measurements of the reactor mixing angle θ13, where we find 0.071≤sin22θ13≤0.107, and the Jarlskog invariant, where we observe no significant preference for the CP-conserving value J=0 over values favoring CP violation. We use these results to examine the effects of constraints from short-baseline measurements of θ13 using antineutrinos from nuclear reactors when making NOvA measurements of θ23. Our long-baseline measurement of θ13 is shown to be consistent with the reactor measurements, supporting the general applicability and robustness of the Pontecorvo-Maki-Nakagawa-Sakata framework for neutrino oscillations. © 2024 authors.

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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
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American Physical Society
Journal
Physical Review D
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2470-0010
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