Measurement of the Neutrino Mixing Angle θ23 in NOvA

NOvA Collaboration

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

This Letter reports new results on muon neutrino disappearance from NOvA, using a 14 kton detector equivalent exposure of 6.05×1020 protons on target from the NuMI beam at the Fermi National Accelerator Laboratory. The measurement probes the muon-tau symmetry hypothesis that requires maximal θ23 mixing (θ23=π/4). Assuming the normal mass hierarchy, we find Δm322=(2.67±0.11)×10-3 eV2 and sin2θ23 at the two statistically degenerate values 0.404-0.022+0.030 and 0.624-0.030+0.022, both at the 68% confidence level. Our data disfavor the maximal mixing scenario with 2.6σ significance.

Original languageEnglish (US)
Article number151802
JournalPhysical Review Letters
Volume118
Issue number15
DOIs
StatePublished - Apr 10 2017
Externally publishedYes

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muons
neutrinos
hierarchies
confidence
accelerators
protons
probes
detectors
symmetry

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Measurement of the Neutrino Mixing Angle θ23 in NOvA. / NOvA Collaboration.

In: Physical Review Letters, Vol. 118, No. 15, 151802, 10.04.2017.

Research output: Contribution to journalArticle

NOvA Collaboration. / Measurement of the Neutrino Mixing Angle θ23 in NOvA. In: Physical Review Letters. 2017 ; Vol. 118, No. 15.
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abstract = "This Letter reports new results on muon neutrino disappearance from NOvA, using a 14 kton detector equivalent exposure of 6.05×1020 protons on target from the NuMI beam at the Fermi National Accelerator Laboratory. The measurement probes the muon-tau symmetry hypothesis that requires maximal θ23 mixing (θ23=π/4). Assuming the normal mass hierarchy, we find Δm322=(2.67±0.11)×10-3 eV2 and sin2θ23 at the two statistically degenerate values 0.404-0.022+0.030 and 0.624-0.030+0.022, both at the 68{\%} confidence level. Our data disfavor the maximal mixing scenario with 2.6σ significance.",
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AU - Arrieta-Diaz, E.

AU - Augsten, K.

AU - Aurisano, A.

AU - Backhouse, C.

AU - Baird, M.

AU - Bambah, B. A.

AU - Bays, K.

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AU - Bending, S.

AU - Bernstein, R.

AU - Bhatnagar, V.

AU - Bhuyan, B.

AU - Bian, J.

AU - Blackburn, T.

AU - Bolshakova, A.

AU - Bromberg, C.

AU - Brown, J.

AU - Brunetti, G.

AU - Buchanan, N.

AU - Butkevich, A.

AU - Bychkov, V.

AU - Campbell, M.

AU - Catano-Mur, E.

AU - Childress, S.

AU - Choudhary, B. C.

AU - Chowdhury, B.

AU - Coan, T. E.

AU - Coelho, J. A.B.

AU - Colo, M.

AU - Cooper, J.

AU - Corwin, L.

AU - Cremonesi, L.

AU - Cronin-Hennessy, D.

AU - Davies, G. S.

AU - Davies, J. P.

AU - Derwent, P. F.

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AU - Dharmapalan, R.

AU - Ding, P.

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AU - Edayath, S.

AU - Ehrlich, R.

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N2 - This Letter reports new results on muon neutrino disappearance from NOvA, using a 14 kton detector equivalent exposure of 6.05×1020 protons on target from the NuMI beam at the Fermi National Accelerator Laboratory. The measurement probes the muon-tau symmetry hypothesis that requires maximal θ23 mixing (θ23=π/4). Assuming the normal mass hierarchy, we find Δm322=(2.67±0.11)×10-3 eV2 and sin2θ23 at the two statistically degenerate values 0.404-0.022+0.030 and 0.624-0.030+0.022, both at the 68% confidence level. Our data disfavor the maximal mixing scenario with 2.6σ significance.

AB - This Letter reports new results on muon neutrino disappearance from NOvA, using a 14 kton detector equivalent exposure of 6.05×1020 protons on target from the NuMI beam at the Fermi National Accelerator Laboratory. The measurement probes the muon-tau symmetry hypothesis that requires maximal θ23 mixing (θ23=π/4). Assuming the normal mass hierarchy, we find Δm322=(2.67±0.11)×10-3 eV2 and sin2θ23 at the two statistically degenerate values 0.404-0.022+0.030 and 0.624-0.030+0.022, both at the 68% confidence level. Our data disfavor the maximal mixing scenario with 2.6σ significance.

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