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Measurements of neutrino oscillation parameters from the T2K experiment using 3.6 × 10 21 protons on target

  • K. Abe
  • , N. Akhlaq
  • , R. Akutsu
  • , A. Ali
  • , S. Alonso Monsalve
  • , C. Alt
  • , C. Andreopoulos
  • , M. Antonova
  • , S. Aoki
  • , T. Arihara
  • , Y. Asada
  • , Y. Ashida
  • , E. T. Atkin
  • , M. Barbi
  • , G. J. Barker
  • , G. Barr
  • , D. Barrow
  • , M. Batkiewicz-Kwasniak
  • , F. Bench
  • , V. Berardi
  • L. Berns, S. Bhadra, A. Blanchet, A. Blondel, S. Bolognesi, T. Bonus, S. Bordoni, S. B. Boyd, A. Bravar, C. Bronner, S. Bron, A. Bubak, M. Buizza Avanzini, J. A. Caballero, N. F. Calabria, S. Cao, D. Carabadjac, A. J. Carter, S. L. Cartwright, M. G. Catanesi, A. Cervera, J. Chakrani, D. Cherdack, P. S. Chong, G. Christodoulou, A. Chvirova, M. Cicerchia, J. Coleman, G. Collazuol, L. Cook, A. Cudd, C. Dalmazzone, T. Daret, Yu I. Davydov, A. De Roeck, G. De Rosa, T. Dealtry, C. C. Delogu, C. Densham, A. Dergacheva, F. Di Lodovico, S. Dolan, D. Douqa, T. A. Doyle, O. Drapier, J. Dumarchez, P. Dunne, K. Dygnarowicz, A. Eguchi, S. Emery-Schrenk, G. Erofeev, A. Ershova, G. Eurin, D. Fedorova, S. Fedotov, M. Feltre, A. J. Finch, G. A. Fiorentini Aguirre, G. Fiorillo, M. D. Fitton, J. M. Franco Patiño, M. Friend, Y. Fujii, Y. Fukuda, K. Fusshoeller, L. Giannessi, C. Giganti, V. Glagolev, M. Gonin, J. González Rosa, E. A.G. Goodman, A. Gorin, M. Grassi, M. Guigue, D. R. Hadley, J. T. Haigh, P. Hamacher-Baumann, D. A. Harris, M. Hartz, T. Hasegawa, S. Hassani, N. C. Hastings, Y. Hayato, D. Henaff, A. Hiramoto, M. Hogan, J. Holeczek, A. Holin, T. Holvey, N. T. Hong Van, T. Honjo, F. Iacob, A. K. Ichikawa, M. Ikeda, T. Ishida, M. Ishitsuka, H. T. Israel, K. Iwamoto, A. Izmaylov, N. Izumi, M. Jakkapu, B. Jamieson, S. J. Jenkins, C. Jesús-Valls, J. J. Jiang, P. Jonsson, S. Joshi, C. K. Jung, P. B. Jurj, M. Kabirnezhad, A. C. Kaboth, T. Kajita, H. Kakuno, J. Kameda, S. P. Kasetti, Y. Kataoka, Y. Katayama, T. Katori, M. Kawaue, E. Kearns, M. Khabibullin, A. Khotjantsev, T. Kikawa, H. Kikutani, S. King, V. Kiseeva, J. Kisiel, T. Kobata, H. Kobayashi, T. Kobayashi, L. Koch, S. Kodama, A. Konaka, L. L. Kormos, Y. Koshio, A. Kostin, T. Koto, K. Kowalik, Y. Kudenko, Y. Kudo, S. Kuribayashi, R. Kurjata, T. Kutter, M. Kuze, M. La Commara, L. Labarga, K. Lachner, J. Lagoda, S. M. Lakshmi, M. Lamers James, M. Lamoureux, A. Langella, J. F. Laporte, D. Last, N. Latham, M. Laveder, L. Lavitola, M. Lawe, Y. Lee, C. Lin, S. K. Lin, R. P. Litchfield, S. L. Liu, W. Li, A. Longhin, K. R. Long, A. Lopez Moreno, L. Ludovici, X. Lu, T. Lux, L. N. Machado, L. Magaletti, K. Mahn, M. Malek, M. Mandal, S. Manly, A. D. Marino, L. Marti-Magro, D. G.R. Martin, M. Martini, J. F. Martin, T. Maruyama, T. Matsubara, V. Matveev, C. Mauger, K. Mavrokoridis, E. Mazzucato, N. McCauley, J. McElwee, K. S. McFarland, C. McGrew, J. McKean, A. Mefodiev, G. D. Megias, P. Mehta, L. Mellet, C. Metelko, M. Mezzetto, E. Miller, A. Minamino, O. Mineev, S. Mine, M. Miura, L. Molina Bueno, S. Moriyama, S. Moriyama, P. Morrison, Th A. Mueller, D. Munford, L. Munteanu, K. Nagai, Y. Nagai, T. Nakadaira, K. Nakagiri, M. Nakahata, Y. Nakajima, A. Nakamura, H. Nakamura, K. Nakamura, K. D. Nakamura, Y. Nakano, S. Nakayama, T. Nakaya, K. Nakayoshi, C. E.R. Naseby, T. V. Ngoc, V. Q. Nguyen, K. Niewczas, S. Nishimori, Y. Nishimura, K. Nishizaki, T. Nosek, F. Nova, P. Novella, J. C. Nugent, H. M. O’Keeffe, L. O’Sullivan, T. Odagawa, T. Ogawa, R. Okada, W. Okinaga, K. Okumura, T. Okusawa, N. Ospina, R. A. Owen, Y. Oyama, V. Palladino, V. Paolone, M. Pari, J. Parlone, S. Parsa, J. Pasternak, M. Pavin, D. Payne, G. C. Penn, D. Pershey, L. Pickering, C. Pidcott, G. Pintaudi, C. Pistillo, B. Popov, K. Porwit, M. Posiadala-Zezula, Y. S. Prabhu, F. Pupilli, B. Quilain, T. Radermacher, E. Radicioni, B. Radics, M. A. Ramírez, P. N. Ratoff, M. Reh, C. Riccio, E. Rondio, S. Roth, N. Roy, A. Rubbia, A. C. Ruggeri, C. A. Ruggles, A. Rychter, K. Sakashita, F. Sánchez, G. Santucci, C. M. Schloesser, K. Scholberg, M. Scott, Y. Seiya, T. Sekiguchi, H. Sekiya, D. Sgalaberna, A. Shaikhiev, F. Shaker, A. Shaykina, M. Shiozawa, W. Shorrock, A. Shvartsman, N. Skrobova, K. Skwarczynski, D. Smyczek, M. Smy, J. T. Sobczyk, H. Sobel, F. J.P. Soler, Y. Sonoda, A. J. Speers, R. Spina, I. A. Suslov, S. Suvorov, A. Suzuki, S. Y. Suzuki, Y. Suzuki, A. A. Sztuc, M. Tada, S. Tairafune, S. Takayasu, A. Takeda, Y. Takeuchi, K. Takifuji, H. K. Tanaka, Y. Tanihara, M. Tani, A. Teklu, V. V. Tereshchenko, N. Teshima, N. Thamm, L. F. Thompson, W. Toki, C. Touramanis, T. Towstego, K. M. Tsui, T. Tsukamoto, M. Tzanov, Y. Uchida, M. Vagins, D. Vargas, M. Varghese, G. Vasseur, C. Vilela, E. Villa, W. G.S. Vinning, U. Virginet, T. Vladisavljevic, T. Wachala, J. G. Walsh, Y. Wang, L. Wan, D. Wark, M. O. Wascko, A. Weber, R. Wendell, M. J. Wilking, C. Wilkinson, J. R. Wilson, K. Wood, C. Wret, J. Xia, Y. H. Xu, K. Yamamoto, T. Yamamoto, C. Yanagisawa, G. Yang, T. Yano, K. Yasutome, N. Yershov, U. Yevarouskaya, M. Yokoyama, Y. Yoshimoto, N. Yoshimura, M. Yu, R. Zaki, A. Zalewska, J. Zalipska, K. Zaremba, G. Zarnecki, X. Zhao, T. Zhu, M. Ziembicki, E. D. Zimmerman, M. Zito, S. Zsoldos
  • Institute for Cosmic Ray Research
  • University of Tokyo
  • School of Physics and Astronomy
  • Queen Mary University of London
  • High Energy Accelerator Research Organization (KEK)
  • TRIUMF
  • Department of Physics
  • University of Winnipeg
  • ETH Zurich
  • University of Liverpool
  • University of Valencia
  • Kobe University
  • Department of Physics
  • Tokyo Metropolitan University
  • Department of Physics
  • Yokohama National University
  • Department of Physics
  • Kyoto University
  • Imperial College London
  • Department of Physics
  • University of Regina
  • University of Warwick
  • University of Oxford
  • Institute for Nuclear Physics
  • INFN Sezione di Bari
  • Tohoku University
  • York University
  • Section de Physique
  • University of Geneva
  • Sorbonne Université
  • Université Paris-Saclay
  • Faculty of Physics and Astronomy
  • Wroclaw University
  • University of Silesia
  • Departamento de Física Atómica
  • University of Seville
  • ICISE
  • Ip Paris
  • Department of Physics
  • Royal Holloway University of London
  • Department of Physics and Astronomy
  • The University of Sheffield
  • University of Houston
  • University of Pennsylvania School of Arts and Sciences
  • European Organization for Nuclear Research
  • Institute for Nuclear Research of the Russian Academy of Sciences
  • Dipartimento di Fisica
  • INFN
  • Laboratori Nazionali di Legnaro
  • University of Colorado Boulder
  • Joint Institute for Nuclear Research, Dubna
  • Dipartimento di Fisica
  • University of Naples Federico II
  • Lancaster University
  • CCLRC Rutherford Appleton Laboratory
  • Department of Physics
  • King's College London
  • Department of Physics and Astronomy
  • Stony Brook University
  • Warsaw University of Technology
  • J-PARC
  • Department of Physics
  • Miyagi University of Education
  • SUPA
  • University of Glasgow
  • RWTH Aachen University
  • Colorado State University
  • International Centre of Physics
  • Vietnam Academy of Science and Technology (VAST)
  • Department of Physics
  • Osaka City University
  • Department of Physics
  • Tokyo University of Science
  • Research Center for Cosmic Neutrinos
  • Department of Physics & Astronomy
  • Louisiana State University
  • Boston University
  • Johannes Gutenberg University
  • Department of Physics
  • Okayama University
  • National Centre for Nuclear Research (NCBJ)
  • National Research Nuclear University MEPhI
  • Department of Physics
  • Tokyo Institute of Technology
  • Facultad de Ciencias
  • Universidad Autónoma de Madrid
  • University of Rome
  • The Barcelona Institute of Science and Technology
  • Department of Physics and Astronomy
  • Michigan State University
  • Department of Physics and Astronomy
  • University of Rochester
  • IPSA-DRII
  • University of Toronto
  • Department of Physics and Astronomy
  • Long Beach VA and University of California
  • Eötvös Loránd University
  • Vietnam Academy of Science and Technology
  • Keio University
  • Department of Physics and Astronomy
  • University of Pittsburgh
  • Department of Physics
  • Duke University
  • University of Bern
  • University of Warsaw
  • Department of Science
  • York College/The City University of New York
  • Ernest Orlando Lawrence Berkeley National Laboratory
  • Nambu Yoichiro Institute of Theoretical and Experimental Physics (NITEP)

Research output: Contribution to journalArticlepeer-review

155 Citations (Scopus)

Abstract

The T2K experiment presents new measurements of neutrino oscillation parameters using 19.7 (16.3) × 10 20 protons on target (POT) in (anti-)neutrino mode at the far detector (FD). Compared to the previous analysis, an additional 4.7 × 10 20 POT neutrino data was collected at the FD. Significant improvements were made to the analysis methodology, with the near-detector analysis introducing new selections and using more than double the data. Additionally, this is the first T2K oscillation analysis to use NA61/SHINE data on a replica of the T2K target to tune the neutrino flux model, and the neutrino interaction model was improved to include new nuclear effects and calculations. Frequentist and Bayesian analyses are presented, including results on sin 2θ13 and the impact of priors on the δCP measurement. Both analyses prefer the normal mass ordering and upper octant of sin 2θ23 with a nearly maximally CP-violating phase. Assuming the normal ordering and using the constraint on sin 2θ13 from reactors, sin2θ23=0.561-0.032+0.021 using Feldman–Cousins corrected intervals, and Δm322=2.494-0.058+0.041×10-3eV2 using constant Δχ2 intervals. The CP-violating phase is constrained to δCP=-1.97-0.70+0.97 using Feldman–Cousins corrected intervals, and δCP= 0 , π is excluded at more than 90% confidence level. A Jarlskog invariant of zero is excluded at more than 2 σ credible level using a flat prior in δCP, and just below 2 σ using a flat prior in sin δCP. When the external constraint on sin 2θ13 is removed, sin2θ13=28.0-6.5+2.8×10-3, in agreement with measurements from reactor experiments. These results are consistent with previous T2K analyses.

Original languageEnglish
Article number782
JournalEuropean Physical Journal C
Volume83
Issue number9
DOIs
Publication statusPublished - 1 Sept 2023

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