T2K measurements of muon neutrino and antineutrino disappearance using 3.13×1021 protons on target

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Abe, K, Akhlaq, N, Akutsu, R, Ali, A, Alt, C, Andreopoulos, C ORCID: 0000-0003-2020-8215, Antonova, M, Aoki, S, Arihara, T, Asada, Y et al (show 90 more authors) , Ashida, Y, Atkin, ET, Awataguchi, Y, Barker, GJ, Barr, G, Barrow, D, Batkiewicz-Kwasniak, M, Beloshapkin, A, Bench, F, Berardi, V, Berns, L, Bhadra, S, Blondel, A, Bolognesi, S, Bonus, T, Bourguille, B, Boyd, SB, Bravar, A, Bravo Berguño, D, Bronner, C, Bron, S, Bubak, A, Buizza Avanzini, M, Cao, S, Cartwright, SL, Catanesi, MG, Cervera, A, Cherdack, D, Christodoulou, G, Cicerchia, M, Coleman, J ORCID: 0000-0003-1319-0889, Collazuol, G, Cook, L, Coplowe, D, Cudd, A, De Rosa, G, Dealtry, T, Delogu, CC, Dennis, SR, Densham, C, Dergacheva, A, Di Lodovico, F, Dolan, S, Doyle, TA, Dumarchez, J, Dunne, P, Eguchi, A, Eklund, L, Emery-Schrenk, S, Ereditato, A, Finch, AJ, Fiorentini, GA, Francois, C, Friend, M, Fujii, Y, Fukuda, R, Fukuda, Y, Fusshoeller, K, Giganti, C, Gonin, M, Gorin, A, Guigue, M, Hadley, DR, Hamacher-Baumann, P, Hartz, M, Hasegawa, T, Hassani, S, Hastings, NC, Hayato, Y, Hiramoto, A, Hogan, M, Holeczek, J, Hong Van, NT, Honjo, T, Iacob, F, Ichikawa, AK, Ikeda, M, Ishida, T, Ishitsuka, M, Iwamoto, K, Izmaylov, A, Izumi, N, Jakkapu, M, Jamieson, B, Jenkins, SJ ORCID: 0000-0002-0982-8141, Jesús-Valls, C, Jonsson, P, Jung, CK, Jurj, PB and Kabirnezhad, M (2021) T2K measurements of muon neutrino and antineutrino disappearance using 3.13×1021 protons on target Physical Review D, 103 (1). 011101-. ISSN 2470-0010, 2470-0029

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Abstract

We report measurements by the T2K experiment of the parameters θ23 and Δm322, which govern the disappearance of muon neutrinos and antineutrinos in the three-flavor PMNS neutrino oscillation model at T2K's neutrino energy and propagation distance. Utilizing the ability of the experiment to run with either a mainly neutrino or a mainly antineutrino beam, muon-like events from each beam mode are used to measure these parameters separately for neutrino and antineutrino oscillations. Data taken from 1.49×1021 protons on target (POT) in neutrino mode and 1.64×1021 POT in antineutrino mode are used. The best-fit values obtained by T2K were sin2(θ23)=0.51-0.07+0.06(0.43-0.05+0.21) and Δm322=2.47-0.09+0.08(2.50-0.13+0.18)×10-3 eV2/c4 for neutrinos (antineutrinos). No significant differences between the values of the parameters describing the disappearance of muon neutrinos and antineutrinos were observed. An analysis using an effective two-flavor neutrino oscillation model where the sine of the mixing angle is allowed to take nonphysical values larger than 1 is also performed to check the consistency of our data with the three-flavor model. Our data were found to be consistent with a physical value for the mixing angle.

Item Type:	Article
Uncontrolled Keywords:	hep-ex, hep-ex
Depositing User:	Symplectic Admin
Date Deposited:	14 Sep 2020 08:40
Last Modified:	01 Mar 2026 09:47
DOI:	10.1103/PhysRevD.103.L011101
Open Access URL:	https://journals.aps.org/prd/abstract/10.1103/Phys...
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3100819
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