Электронный каталог

Статья

Acero, M.A.
Expanding Neutrino Oscillation Parameter Measurements in NOvA Using a Bayesian Approach / M.A.Acero, N.Anfimov, A.Antoshkin, N.Balashov, I.Kakorin, A.Kalitkina, O.Klimov, L.Kolupaeva, A.Morozova, A.Olshevskiy, O.Petrova, O.Samoylov, A.Sheshukov, [a.o.] // Physical Review D [Electronic resource]. – 2024. – Vol. 110, No. 1. – P. 012005. – URL: https://doi.org/10.1103/PhysRevD.110.012005. – Bibliogr.: 103.

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)] 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≤sin2⁡2⁢𝜃13≤0.107, and the Jarlskog invariant, where we observe no significant preference for the 𝐶⁢𝑃-conserving value 𝐽=0 over values favoring 𝐶⁢𝑃 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.



ОИЯИ = ОИЯИ (JINR)2024
Спец.(статьи,препринты) = С 346.1а - Свойства нейтрино