Improved measurement of neutrino oscillation parameters by the NOvA experiment

(The NOvA Collaboration)

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number032004
JournalPhysical Review D
Volume106
Issue number3
DOIs
StatePublished - Aug 1 2022

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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