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First measurement of neutrino oscillation parameters using neutrinos and antineutrinos by NOvA

Acero, M. A. and Bays, K. and Lozier, J. and Mualem, L. and Patterson, R. B. and Pershey, D. and Raj, V. (2019) First measurement of neutrino oscillation parameters using neutrinos and antineutrinos by NOvA. Physical Review Letters, 123 (15). Art. No. 151803. ISSN 0031-9007. doi:10.1103/PhysRevLett.123.151803.

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The NOvA experiment has seen a 4.4σ signal of ν_e appearance in a 2 GeV ν_μ beam at a distance of 810 km. Using 12.33×10^(20) protons on target delivered to the Fermilab NuMI neutrino beamline, the experiment recorded 27 ν_μ→ν_e candidates with a background of 10.3 and 102 ν_μ→ν_μ candidates. This new antineutrino data are combined with neutrino data to measure the parameters |Δm^2_(32)|=2.48^(+0.11)_(−0.06)×10^(-3)  eV^2/c^4 and sin^2 θ_(23) in the ranges from (0.53–0.60) and (0.45–0.48) in the normal neutrino mass hierarchy. The data exclude most values near δ_(CP) = π/2 for the inverted mass hierarchy by more than 3σ and favor the normal neutrino mass hierarchy by 1.9σ and θ_(23) values in the upper octant by 1.6σ.

Item Type:Article
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URLURL TypeDescription Paper
Mualem, L.0000-0003-3716-5100
Patterson, R. B.0000-0002-5787-9517
Additional Information:© 2019 Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3. Received 13 June 2019; published 11 October 2019. We are grateful to Stephen Parke (FNAL) for useful discussions. This document was prepared by the NOvA collaboration using the resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE-AC02-07CH11359. 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, RFBR, RMES, RSF, and BASIS Foundation, Russia; CNPq and FAPEG, Brazil; STFC, and the Royal Society, United Kingdom; and the state and University of Minnesota. This work used resources of the National Energy Research Scientific Computing Center (NERSC), a U.S. Department of Energy Office of Science User Facility operated under Contract No. DE-AC02-05CH11231. We are grateful for the contributions of the staffs of the University of Minnesota at the Ash River Laboratory and of Fermilab.
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC02-07CH11359
Department of Science and Technology (India)UNSPECIFIED
European Research Council (ERC)UNSPECIFIED
Ministerstvo školství, mládeže a tělovýchovy České republiky (MŠMT)UNSPECIFIED
Grantová agentura (GA)UNSPECIFIED
Russian Academy of SciencesUNSPECIFIED
Russian Foundation for Basic ResearchUNSPECIFIED
Russian Ministry for Education and Science (RMES)UNSPECIFIED
Russian Science FoundationUNSPECIFIED
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)UNSPECIFIED
Fundação de Amparo à Pesquisa do Estado de Goiás (FAPEG)UNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
State of MinnesotaUNSPECIFIED
University of MinnesotaUNSPECIFIED
Department of Energy (DOE)DE-AC02-05CH11231
Issue or Number:15
Record Number:CaltechAUTHORS:20191011-104925367
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:99237
Deposited By: Tony Diaz
Deposited On:11 Oct 2019 18:14
Last Modified:16 Nov 2021 17:44

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