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Improved measurement of neutrino oscillation parameters by the NOvA experiment

Acero, M. A. and Adamson, P. and Aliaga, L. and Anfimov, N. and Antoshkin, A. and Arrieta-Diaz, E. and Asquith, L. and Aurisano, A. and Back, A. and Backhouse, C. and Baird, M. and Balashov, N. and Baldi, P. and Bambah, B. A. and Bashar, S. and Bays, K. and Bernstein, R. and Bhatnagar, V. and Bhattarai, D. and Bhuyan, B. and Bian, J. and Blair, J. and Booth, A. C. and Bowles, R. and Bromberg, C. and Buchanan, N. and Butkevich, A. and Calvez, S. and Carroll, T. J. and Catano-Mur, E. and Choudhary, B. C. and Christensen, A. and Coan, T. E. and Colo, M. and Cremonesi, L. and Davies, G. S. and Derwent, P. F. and Ding, P. and Djurcic, Z. and Dolce, M. and Doyle, D. and Dueñas Tonguino, D. and Dukes, E. C. and Duyang, H. and Ehrlich, R. and Elkins, M. and Ewart, E. and Feldman, G. J. and Filip, P. and Franc, J. and Frank, M. J. and Gallagher, H. R. and Gandrajula, R. and Gao, F. and Giri, A. and Gomes, R. A. and Goodman, M. C. and Grichine, V. and Groh, M. and Group, R. and Guo, B. and Habig, A. and Hakl, F. and Hall, A. and Hartnell, J. and Hatcher, R. and Hausner, H. and He, M. and Heller, K. and Hewes, J. and Himmel, A. and Holin, A. and Huang, J. and Jargowsky, B. and Jarosz, J. and Jediny, F. and Johnson, C. and Judah, M. and Kakorin, I. and Kaplan, D. M. and Kalitkina, A. and Keloth, R. and Klimov, O. and Koerner, L. W. and Kolupaeva, L. and Kotelnikov, S. and Kralik, R. and Kullenberg, Ch. and Kubu, M. and Kumar, A. and Kuruppu, C. D. and Kus, V. and Lackey, T. and Lang, K. and Lasorak, P. and Lesmeister, J. and Lin, S. and Lister, A. and Liu, J. and Lokajicek, M. and Magill, S. and Manrique Plata, M. and Mann, W. A. and Marshak, M. L. and Martinez-Casales, M. and Matveev, V. and Mayes, B. and Méndez, D. P. and Messier, M. D. and Meyer, H. and Miao, T. and Miller, W. H. and Mishra, S. R. and Mislivec, A. and Mohanta, R. and Moren, A. and Morozova, A. and Mu, W. and Mualem, L. and Muether, M. and Mufson, S. and Mulder, K. and Naples, D. and Nayak, N. and Nelson, J. K. and Nichol, R. and Niner, E. and Norman, A. and Norrick, A. and Nosek, T. and Oh, H. and Olshevskiy, A. and Olson, T. and Ott, J. and Paley, J. and Patterson, R. B. and Pawloski, G. and Petrova, O. and Petti, R. and Phan, D. D. and Plunkett, R. K. and Porter, J. C. C. and Rafique, A. and Psihas, F. and Raj, V. and Rajaoalisoa, M. and Ramson, B. and Rebel, B. and Rojas, P. and Roy, P. and Ryabov, V. and Samoylov, O. and Sanchez, M. C. and Sánchez Falero, S. and Shanahan, P. and Sheshukov, A. and Singh, P. and Singh, V. and Smith, E. and Smolik, J. and Snopok, P. and Solomey, N. and Sousa, A. and Soustruznik, K. and Strait, M. and Suter, L. and Sutton, A. and Swain, S. and Sweeney, C. and Sztuc, A. and Talaga, R. L. and Tapia Oregui, B. and Tas, P. and Thakore, T. and Thayyullathil, R. B. and Thomas, J. and Tiras, E. and Tripathi, J. and Trokan-Tenorio, J. and Tsaris, A. and Torun, Y. and Urheim, J. and Vahle, P. and Vallari, Z. and Vasel, J. and Vokac, P. and Vrba, T. and Wallbank, M. and Warburton, T. K. and Wetstein, M. and Whittington, D. and Wickremasinghe, D. A. and Wojcicki, S. G. and Wolcott, J. and Wu, W. and Xiao, Y. and Yallappa Dombara, A. and Yankelevich, A. and Yonehara, K. and Yu, S. and Yu, Y. and Zadorozhnyy, S. and Zalesak, J. and Zhang, Y. and Zwaska, R. (2022) Improved measurement of neutrino oscillation parameters by the NOvA experiment. Physical Review D, 106 (3). Art. No. 032004. ISSN 2470-0010. doi:10.1103/physrevd.106.032004.

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We present new ν_µ→νₑ, ν_μ→ν_μ, ν̅_μ→ν̅ₑ, and ν̅_μ→νν̅_μ oscillation measurements by the NOvA experiment, with a 50% increase in neutrino-mode beam exposure over the previously reported results. The additional data, combined with previously published neutrino and antineutrino data, are all analyzed using improved techniques and simulations. A joint fit to the νₑ, ν_μ, ν̅ₑ, and ν̅_μ candidate samples within the 3-flavor neutrino oscillation framework continues to yield a best-fit point in the normal mass ordering and the upper octant of the θ₂₃ mixing angle, with Δm²₃₂ = (2.41±0.07) × 10⁻³ eV² and sin²θ₂₃ = 0.57^(+0.03)_(−0.04). The data disfavor combinations of oscillation parameters that give rise to a large asymmetry in the rates of νe and ν⎯⎯⎯e appearance. This includes values of the CP-violating phase in the vicinity of δ_(CP) = π/2 which are excluded by >3σ for the inverted mass ordering, and values around δ_(CP) = 3π/2 in the normal ordering which are disfavored at 2σ confidence.

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URLURL TypeDescription Paper InPhysics : Viewpoint Information
Mualem, L.0000-0003-3716-5100
Patterson, R. B.0000-0002-5787-9517
Additional Information: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 19 August 2021; accepted 27 April 2022; published 3 August 2022) 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, Russian Ministry of Education and Science (RMES), RSF, and BASIS Foundation, Russia; CNPq and FAPEG, Brazil; STFC, UKRI, and the Royal Society, United Kingdom; and the State and University of Minnesota. 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
Ministry of Education, Youth and Sports (Czech Republic)UNSPECIFIED
Czech Science FoundationUNSPECIFIED
Russian Academy of SciencesUNSPECIFIED
Russian Foundation for Basic ResearchUNSPECIFIED
Ministry of Education and Science of the Russian FederationUNSPECIFIED
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
UK Research and InnovationUNSPECIFIED
University of MinnesotaUNSPECIFIED
State of MinnesotaUNSPECIFIED
Issue or Number:3
Record Number:CaltechAUTHORS:20220804-250558000
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:116128
Deposited By: George Porter
Deposited On:11 Aug 2022 23:32
Last Modified:11 Aug 2022 23:32

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