Acero, MA;
Adamson, P;
Aliaga, L;
Anfimov, N;
Antoshkin, A;
Arrieta-Diaz, E;
Asquith, L;
... Zwaska, R; + view all
(2022)
Improved measurement of neutrino oscillation parameters by the NOvA experiment.
Physical Review D
, 106
(3)
, Article 032004. 10.1103/physrevd.106.032004.
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Abstract
We present new ν μ → ν e , ν μ → ν μ , ¯ 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 ν e , ν μ , ¯ 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 θ 23 mixing angle, with Δ m 2 32 = ( 2.41 ± 0.07 ) × 10 − 3 eV 2 and sin 2 θ 23 = 0.5 7 + 0.03 − 0.04 . The data disfavor combinations of oscillation parameters that give rise to a large asymmetry in the rates of ν e and ¯ ν e appearance. This includes values of the charge parity symmetry (CP) violating phase in the vicinity of δ CP = π / 2 which are excluded by > 3 σ for the inverted mass ordering, and values around δ CP = 3 π / 2 in the normal ordering which are disfavored at 2 σ confidence.
| Type: | Article |
|---|---|
| Title: | Improved measurement of neutrino oscillation parameters by the NOvA experiment |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/physrevd.106.032004 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevD.106.032004 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third-party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10153968 |
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