Improved measurement of neutrino oscillation parameters by the NOvA experiment

Acero, MA, Adamson, P, Aliaga, L, Anfimov, N, Antoshkin, A, Arrieta-Diaz, E, Asquith, L, Kralik, R, Mayes, B, Porter, J, Zhang, Y, Balashov, N, Baldi, P, Bambah, BA, Hartnell, J and The NOvA Collaboration, (2022) Improved measurement of neutrino oscillation parameters by the NOvA experiment. Physical Review D, 106. a032004 1-12. ISSN 2470-0010

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We present new νμ→νe, νμ→νμ, ν¯μ→ν¯e, and ν¯μ→ν¯μ oscillation measurements by the NOvA experiment, with a 50% increase in neutrino-mode beam exposure over the previously reported results. The additional data, combined with previously published neutrino and antineutrino data, are all analyzed using improved techniques and simulations. A joint fit to the νe, νμ, ν¯e, and ν¯μ candidate samples within the 3-flavor neutrino oscillation framework continues to yield a best-fit point in the normal mass ordering and the upper octant of the θ23 mixing angle, with Δm322=(2.41±0.07)×10-3 eV2 and sin2θ23=0.57-0.04+0.03. The data disfavor combinations of oscillation parameters that give rise to a large asymmetry in the rates of νe and ν¯e appearance. This includes values of the charge parity symmetry (CP) violating phase in the vicinity of δCP=π/2 which are excluded by >3σ for the inverted mass ordering, and values around δCP=3π/2 in the normal ordering which are disfavored at 2σ confidence.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
SWORD Depositor: Mx Elements Account
Depositing User: Mx Elements Account
Date Deposited: 28 Sep 2022 13:46
Last Modified: 28 Sep 2022 14:00

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