Expanding neutrino oscillation parameter measurements in NOvA using a Bayesian approach

Creators: Acero, M. A.; Acharya, B.; Adamson, P.; Anfimov, N.; Antoshkin, A.; Arrieta-Diaz, E.; Asquith, L.; Aurisano, A.; Back, A.; Balashov, N.; Baldi, P.; Bambah, B. A.; Bat, A.; Bays, K.; Bernstein, R.; Bezerra, T. J. C.; Bhatnagar, V.; Bhattarai, D.; Bhuyan, B.; Bian, J.; Booth, A. C.; Bowles, R.; Brahma, B.; Bromberg, C.; Buchanan, N.; Butkevich, A.; Calvez, S.; Carroll, T. J.; Catano-Mur, E.; Cesar, J. P.; Chatla, A.; Chaudhary, S.; Chirco, R.; Choudhary, B. C.; Christensen, A.; Coan, T. E.; Cooleybeck, A.; Cremonesi, L.; Davies, G. S.; Derwent, P. F.; Ding, P.; Djurcic, Z.; Dolce, M.; Doyle, D.; Dueñas Tonguino, D.; Dukes, E. C.; Dye, A.; Ehrlich, R.; Elkins, M.; Ewart, E.; Filip, P.; Franc, J.; Frank, M. J.; Gallagher, H. R.; Gao, F.; Giri, A.; Gomes, R. A.; Goodman, M. C.; Groh, M.; Group, R.; Habig, A.; Hakl, F.; Hartnell, J.; Hatcher, R.; He, M.; Heller, K.; Hewes, V.; Himmel, A.; Jargowsky, B.; Jarosz, J.; Jediny, F.; Johnson, C.; Judah, M.; Kakorin, I.; Kaplan, D. M.; Kalitkina, A.; Kleykamp, J.; Klimov, O.; Koerner, L. W.; Kolupaeva, L.; Kralik, R.; Kumar, A.; Kuruppu, C. D.; Kus, V.; Lackey, T.; Lang, K.; Lasorak, P.; Lesmeister, J.; Lister, A.; Liu, J.; Lock, J. A.; Lokajicek, M.; MacMahon, M.; Magill, S.; Mann, W. A.; Manoharan, M. T.; Manrique Plata, M.; Marshak, M. L.; Martinez-Casales, M.; Matveev, V.; Mehta, B.; Messier, M. D.; Meyer, H.; Miao, T.; Mikola, V.; Miller, W. H.; Mishra, S.; Mishra, S. R.; Mohanta, R.; Moren, A.; Morozova, A.; Mu, W.; Mualem, L.; Muether, M.; Mulder, K.; Myers, D.; Naples, D.; Nath, A.; Nelleri, S.; Nelson, J. K.; Nichol, R.; Niner, E.; Norman, A.; Norrick, A.; Nosek, T.; Oh, H.; Olshevskiy, A.; Olson, T.; Pal, A.; Paley, J.; Panda, L.; Patterson, R. B.¹; Pawloski, G.; Petrova, O.; Petti, R.; Plunkett, R. K.; Prais, L. R.; Rafique, A.; Raj, V.; Rajaoalisoa, M.; Ramson, B.; Rebel, B.; Roy, P.; Samoylov, O.; Sanchez, M. C.; Sánchez Falero, S.; Shanahan, P.; Sharma, P.; Sheshukov, A.; Shukla, S.; Singha, D. K.; Shorrock, W.; Singh, I.; Singh, P.; Singh, V.; Smith, E.; Smolik, J.; Snopok, P.; Solomey, N.; Sousa, A.; Soustruznik, K.; Strait, M.; Suter, L.; Sutton, A.; Sutton, K.; Swain, S.; Sweeney, C.; Sztuc, A.; Tapia Oregui, B.; Tas, P.; Thakore, T.; Thomas, J.; Tiras, E.; Torun, Y.; Trokan-Tenorio, J.; Urheim, J.; Vahle, P.; Vallari, Z.; Vockerodt, K. J.; Vrba, T.; Wallbank, M.; Warburton, T. K.; Wetstein, M.; Whittington, D.; Wickremasinghe, D. A.; Wieber, T.; Wolcott, J.; Wrobel, M.; Wu, S.; Wu, W.; Xiao, Y.; Yaeggy, B.; Yankelevich, A.; Yonehara, K.; Yu, Y.; Zadorozhnyy, S.; Zalesak, J.; Zwaska, R.; NOvA Collaboration

1. California Institute of Technology

Abstract

NOvA is a long-baseline neutrino oscillation experiment that measures oscillations in charged-current 𝜈_𝜇→𝜈_𝜇 (disappearance) and 𝜈_𝜇→𝜈_𝑒 (appearance) channels, and their antineutrino counterparts, using neutrinos of energies around 2 GeV over a distance of 810 km. In this work we reanalyze the dataset first examined in our previous paper [Phys. Rev. D 106, 032004 (2022)] using an alternative statistical approach based on Bayesian Markov chain Monte Carlo. We measure oscillation parameters consistent with the previous results. We also extend our inferences to include the first NOvA measurements of the reactor mixing angle 𝜃₁₃, where we find 0.071 ≤ sin² ⁡2⁢𝜃₁₃ ≤ 0.107, and the Jarlskog invariant, where we observe no significant preference for the 𝐶⁢𝑃-conserving value 𝐽 = 0 over values favoring 𝐶⁢𝑃 violation. We use these results to examine the effects of constraints from short-baseline measurements of 𝜃₁₃ using antineutrinos from nuclear reactors when making NOvA measurements of 𝜃23. Our long-baseline measurement of 𝜃₁₃ is shown to be consistent with the reactor measurements, supporting the general applicability and robustness of the Pontecorvo-Maki-Nakagawa-Sakata framework for neutrino oscillations.

Copyright and License

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.

Funding

Funded by SCOAP³.

Acknowledgement

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, MSHE, and RFBR, Russia; CNPq and FAPEG, Brazil; UKRI, STFC 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. For the purpose of open access, the author has applied a Creative Commons Attribution (CC BY) license to any Author Accepted Manuscript version arising.

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