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.

Adamson, P., Aliaga, L., Ambrose, D., Anfimov, N., Antoshkin, A., Arrieta-Diaz, E., et al. (2017). Measurement of the Neutrino Mixing Angle θ23 in NOvA. PHYSICAL REVIEW LETTERS, 118(15) [10.1103/PhysRevLett.118.151802].

Measurement of the Neutrino Mixing Angle θ23 in NOvA

Brunetti G;
2017

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.
Articolo in rivista - Articolo scientifico
neutrino oscillation, neutrino mixing angle, NOvA
English
2017
118
15
151802
none
Adamson, P., Aliaga, L., Ambrose, D., Anfimov, N., Antoshkin, A., Arrieta-Diaz, E., et al. (2017). Measurement of the Neutrino Mixing Angle θ23 in NOvA. PHYSICAL REVIEW LETTERS, 118(15) [10.1103/PhysRevLett.118.151802].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/283953
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