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Measurement of the Neutrino Mixing Angle θ_(23) in NOvA

Adamson, P. and Backhouse, C. and Bays, K. and Lozier, J. and Mualem, L. and Patterson, R. B. and Pershey, D. (2017) Measurement of the Neutrino Mixing Angle θ_(23) in NOvA. Physical Review Letters, 118 (15). Art. No. 151802. ISSN 0031-9007.

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This Letter reports new results on muon neutrino disappearance from NOvA, using a 14 kton detector equivalent exposure of 6.05×10^(20) protons on target from the NuMI beam at the Fermi National Accelerator Laboratory. The measurement probes the muon-tau symmetry hypothesis that requires maximal θ_(23) mixing (θ_(23)=π/4). Assuming the normal mass hierarchy, we find Δm^2_(32)=(2.67±0.11)×10^(−3)  eV^2 and sin^2 θ_(23) 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
Related URLs:
URLURL TypeDescription Paper
Mualem, L.0000-0003-3716-5100
Patterson, R. B.0000-0002-5787-9517
Additional Information:© 2017 American Physical Society. Received 23 January 2017; published 10 April 2017. This work was supported by the U.S. Department of Energy; the U.S. National Science Foundation; the Department of Science and Technology, India; the European Research Council; the MSMT CR, GA UK, Czech Republic; the RAS, RMES, and RFBR, Russia; CNPq and FAPEG, Brazil; and the state and University of Minnesota. We are grateful for the contributions of the staffs of the University of Minnesota module assembly facility, Argonne National Laboratory, and Fermilab. Fermilab is operated by Fermi Research Alliance, LLC under Contract No. De-AC02-07CH11359 with the U.S. DOE.
Funding AgencyGrant Number
Department of Science and Technology (India)UNSPECIFIED
European Research Council (ERC)UNSPECIFIED
Ministry of Education, Youth and Sports (Czech Republic)UNSPECIFIED
Russian Academy of SciencesUNSPECIFIED
Ministry of Education and Science of the Russian FederationUNSPECIFIED
Russian Foundation for Basic ResearchUNSPECIFIED
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)UNSPECIFIED
Fundação de Amparo à Pesquisa do Estado de GoiásUNSPECIFIED
State of MinnesotaUNSPECIFIED
University of MinnesotaUNSPECIFIED
Department of Energy (DOE)DE-AC02-07CH11359
Issue or Number:15
Record Number:CaltechAUTHORS:20170410-141727701
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:76483
Deposited By: Tony Diaz
Deposited On:10 Apr 2017 21:31
Last Modified:11 Nov 2020 23:14

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