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Improved measurement of neutrino oscillation parameters by the NOvA experiment

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posted on 2023-06-10, 04:53 authored by MA Acero, P Adamson, L Aliaga, N Anfimov, A Antoshkin, E Arrieta-Diaz, Lily AsquithLily Asquith, R Kralik, Brett MayesBrett Mayes, Joshua PorterJoshua Porter, Y Zhang, N Balashov, P Baldi, BA Bambah, Jeff HartnellJeff Hartnell, The NOvA Collaboration
We present new ?µ??e, ?µ??µ, ?¯µ??¯e, and ?¯µ??¯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 ?e, ?µ, ?¯e, and ?¯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 ?23 mixing angle, with ?m322=(2.41±0.07)×10-3 eV2 and sin2?23=0.57-0.04+0.03. The data disfavor combinations of oscillation parameters that give rise to a large asymmetry in the rates of ?e and ?¯e appearance. This includes values of the charge parity symmetry (CP) violating phase in the vicinity of dCP=p/2 which are excluded by >3s for the inverted mass ordering, and values around dCP=3p/2 in the normal ordering which are disfavored at 2s confidence.

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Publication status

  • Published

File Version

  • Published version

Journal

Physical Review D

ISSN

2470-0010

Publisher

American Physical Society (APS)

Volume

106

Page range

a032004 1-12

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2022-09-28

First Open Access (FOA) Date

2022-09-28

First Compliant Deposit (FCD) Date

2022-09-27

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