Baird, M, Blackburn, T, Davies, J P, Hartnell, J, Mendez Mendez, D P, Tamsett, M, Vinton, L and Zamorano, B (2017) Measurement of the neutrino mixing angle θ23 in NOvA. Physical Review Letters, 118 (15). a151802 1-7. ISSN 0031-9007
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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 Δm232=(2.67±0.11)×10−3 eV2 and sin2θ23 at the two statistically degenerate values 0.404 +0.030−0.022 and 0.624 +0.022−0.030, both at the 68% confidence level. Our data disfavor the maximal mixing scenario with 2.6σ significance.
Item Type: | Article |
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Schools and Departments: | School of Mathematical and Physical Sciences > Physics and Astronomy |
Research Centres and Groups: | Experimental Particle Physics Research Group |
Subjects: | Q Science > QC Physics |
Depositing User: | Billy Wichaidit |
Date Deposited: | 22 Jun 2017 09:14 |
Last Modified: | 16 Nov 2020 16:15 |
URI: | http://sro.sussex.ac.uk/id/eprint/68786 |
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📧 Request an updateProject Name | Sussex Project Number | Funder | Funder Ref |
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Probing Fundamental Physics with Antineutrinos at the NOvA Experiment | G0949 | EUROPEAN UNION | 307395 |