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Atmospheric neutrino oscillation analysis with neutron tagging and an expanded fiducial volume in Super-Kamiokande I–V

T. Wester ^4,*, K. Abe^1,44, C. Bronner ¹, Y. Hayato ^1,44, K. Hiraide ^1,44, K. Hosokawa ¹, K. Ieki ^1,44, M. Ikeda ^1,44, J. Kameda^1,44 et al. (The Super-Kamiokande Collaboration)

J. Kameda^1,44, Y. Kanemura¹, R. Kaneshima¹, Y. Kashiwagi¹, Y. Kataoka ^1,44, S. Miki¹, S. Mine^1,6, M. Miura^1,44, S. Moriyama ^1,44, Y. Nakano ¹, M. Nakahata ^1,44, S. Nakayama ^1,44, Y. Noguchi ¹, K. Sato¹, H. Sekiya ^1,44, H. Shiba¹, K. Shimizu¹, M. Shiozawa ^1,44, Y. Sonoda¹, Y. Suzuki¹, A. Takeda^1,44, Y. Takemoto ^1,44, H. Tanaka^1,44, T. Yano ¹, S. Han², T. Kajita^2,44,22, K. Okumura ^2,44, T. Tashiro ², T. Tomiya², X. Wang², S. Yoshida², P. Fernandez ³, L. Labarga ³, N. Ospina ³, B. Zaldivar³, B. W. Pointon^5,47, E. Kearns ^4,44, J. L. Raaf⁴, L. Wan ⁴, J. Bian⁶, N. J. Griskevich ⁶, S. Locke⁶, M. B. Smy^6,44, H. W. Sobel ^6,44, V. Takhistov^6,24, A. Yankelevich ⁶, J. Hill⁷, S. H. Lee⁸, D. H. Moon⁸, R. G. Park⁸, B. Bodur ⁹, K. Scholberg ^9,44, C. W. Walter ^9,44, A. Beauchêne¹⁰, O. Drapier¹⁰, A. Giampaolo¹⁰, Th. A. Mueller ¹⁰, A. D. Santos¹⁰, P. Paganini ¹⁰, B. Quilain¹⁰, T. Nakamura¹¹, J. S. Jang¹², L. N. Machado ¹³, J. G. Learned¹⁴, K. Choi¹⁵, N. Iovine ¹⁵, S. Cao¹⁶, L. H. V. Anthony¹⁷, D. Martin¹⁷, N. W. Prouse ¹⁷, M. Scott ¹⁷, A. A. Sztuc¹⁷, Y. Uchida¹⁷, V. Berardi ¹⁸, M. G. Catanesi¹⁸, E. Radicioni¹⁸, N. F. Calabria ¹⁹, A. Langella ¹⁹, G. De Rosa¹⁹, G. Collazuol ²⁰, F. Iacob ²⁰, M. Mattiazzi ²⁰, L. Ludovici²¹, M. Gonin²², G. Pronost ²², C. Fujisawa²³, Y. Maekawa²³, Y. Nishimura ²³, R. Okazaki²³, R. Akutsu²⁴, M. Friend²⁴, T. Hasegawa ²⁴, T. Ishida²⁴, T. Kobayashi²⁴, M. Jakkapu²⁴, T. Matsubara ²⁴, T. Nakadaira²⁴, K. Nakamura^24,44, Y. Oyama ²⁴, K. Sakashita²⁴, T. Sekiguchi²⁴, T. Tsukamoto²⁴, N. Bhuiyan²⁵, G. T. Burton²⁵, F. Di Lodovico²⁵, J. Gao²⁵, A. Goldsack²⁵, T. Katori ²⁵, J. Migenda ²⁵, R. Ramsden²⁵, Z. Xie²⁵, S. Zsoldos ^25,44, A. T. Suzuki²⁶, Y. Takagi²⁶, Y. Takeuchi ^26,44, H. Zhong²⁶, J. Feng²⁷, L. Feng²⁷, J. R. Hu ²⁷, Z. Hu ²⁷, M. Kawaue²⁷, T. Kikawa²⁷, M. Mori²⁷, T. Nakaya ^27,44, R. A. Wendell ^27,44, K. Yasutome²⁷, S. J. Jenkins ²⁸, N. McCauley ²⁸, P. Mehta²⁸, A. Tarrant ²⁸, Y. Fukuda ²⁹, Y. Itow ^30,31, H. Menjo ³⁰, K. Ninomiya³⁰, J. Lagoda³², S. M. Lakshmi³², M. Mandal³², P. Mijakowski³², Y. S. Prabhu³², J. Zalipska³², M. Jia³³, J. Jiang³³, C. K. Jung³³, W. Shi³³, M. J. Wilking³³, C. Yanagisawa ^33,†, M. Harada ³⁴, Y. Hino ³⁴, H. Ishino³⁴, Y. Koshio ^34,44, F. Nakanishi ³⁴, S. Sakai ³⁴, T. Tada³⁴, T. Tano³⁴, T. Ishizuka³⁵, G. Barr³⁶, D. Barrow ³⁶, L. Cook^36,44, A. Holin³⁶, F. Nova ³⁶, S. Samani³⁶, D. Wark³⁶, S. Jung³⁷, B. S. Yang ³⁷, J. Y. Yang ³⁷, J. Yoo³⁷, J. E. P. Fannon³⁸, L. Kneale ³⁸, M. Malek³⁸, J. M. McElwee³⁸, M. D. Thiesse ³⁸, L. F. Thompson ³⁸, S. T. Wilson³⁸, H. Okazawa³⁹, S. B. Kim⁴⁰, E. Kwon ⁴⁰, J. W. Seo ⁴⁰, I. Yu ⁴⁰, A. K. Ichikawa⁴¹, K. D. Nakamura ⁴¹, S. Tairafune ⁴¹, K. Nishijima ⁴², A. Eguchi ⁴³, K. Nakagiri⁴³, Y. Nakajima ^43,44, S. Shima⁴³, N. Taniuchi⁴³, E. Watanabe⁴³, M. Yokoyama ^43,44, P. de Perio⁴⁴, S. Fujita ⁴⁴, K. Martens ⁴⁴, K. M. Tsui⁴⁴, M. R. Vagins ^44,6, J. Xia ⁴⁴, S. Izumiyama ⁴⁵, M. Kuze ⁴⁵, R. Matsumoto ⁴⁵, M. Ishitsuka⁴⁶, H. Ito ⁴⁶, Y. Ommura⁴⁶, N. Shigeta⁴⁶, M. Shinoki ⁴⁶, K. Yamauchi ⁴⁶, T. Yoshida⁴⁶, R. Gaur⁴⁷, V. Gousy-Leblanc^47,‡, M. Hartz⁴⁷, A. Konaka⁴⁷, X. Li⁴⁷, S. Chen⁴⁸, B. D. Xu ⁴⁸, B. Zhang⁴⁸, M. Posiadala-Zezula ⁴⁹, S. B. Boyd⁵⁰, R. Edwards⁵⁰, D. Hadley⁵⁰, M. Nicholson⁵⁰, M. O’Flaherty⁵⁰, B. Richards⁵⁰, A. Ali^51,47, B. Jamieson⁵¹, S. Amanai⁵², Ll. Marti ⁵², A. Minamino ⁵², and S. Suzuki⁵² (The Super-Kamiokande Collaboration)

¹Kamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, Japan
²Research Center for Cosmic Neutrinos, Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan
³Department of Theoretical Physics, University Autonoma Madrid, 28049 Madrid, Spain
⁴Department of Physics, Boston University, Boston, Massachusetts 02215, USA
⁵Department of Physics, British Columbia Institute of Technology, Burnaby, British Columbia V5G 3H2, Canada
⁶Department of Physics and Astronomy, University of California, Irvine, Irvine, California 92697-4575, USA
⁷Department of Physics, California State University, Dominguez Hills, Carson, California 90747, USA
⁸Institute for Universe and Elementary Particles, Chonnam National University, Gwangju 61186, Korea
⁹Department of Physics, Duke University, Durham, North Carolina 27708, USA
¹⁰Ecole Polytechnique, IN2P3-CNRS, Laboratoire Leprince-Ringuet, F-91120 Palaiseau, France
¹¹Department of Physics, Gifu University, Gifu, Gifu 501-1193, Japan
¹²GIST College, Gwangju Institute of Science and Technology, Gwangju 500-712, Korea
¹³School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom
¹⁴Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822, USA
¹⁵Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Korea
¹⁶Institute For Interdisciplinary Research in Science and Education, ICISE, Quy Nhon 55121, Vietnam
¹⁷Department of Physics, Imperial College London, London SW7 2AZ, United Kingdom
¹⁸Dipartimento Interuniversitario di Fisica, INFN Sezione di Bari and Università e Politecnico di Bari, I-70125, Bari, Italy
¹⁹Dipartimento di Fisica, INFN Sezione di Napoli and Università di Napoli, I-80126, Napoli, Italy
²⁰Dipartimento di Fisica, INFN Sezione di Padova and Università di Padova, I-35131, Padova, Italy
²¹INFN Sezione di Roma and Università di Roma “La Sapienza,” I-00185, Roma, Italy
²²ILANCE, CNRS—University of Tokyo International Research Laboratory, Kashiwa, Chiba 277-8582, Japan
²³Department of Physics, Keio University, Yokohama, Kanagawa 223-8522, Japan
²⁴High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
²⁵Department of Physics, King’s College London, London WC2R 2LS, United Kingdom
²⁶Department of Physics, Kobe University, Kobe, Hyogo 657-8501, Japan
²⁷Department of Physics, Kyoto University, Kyoto, Kyoto 606-8502, Japan
²⁸Department of Physics, University of Liverpool, Liverpool L69 7ZE, United Kingdom
²⁹Department of Physics, Miyagi University of Education, Sendai, Miyagi 980-0845, Japan
³⁰Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Aichi 464-8602, Japan
³¹Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University, Nagoya, Aichi 464-8602, Japan
³²National Centre for Nuclear Research, 02-093 Warsaw, Poland
³³Department of Physics and Astronomy, State University of New York at Stony Brook, New York 11794-3800, USA
³⁴Department of Physics, Okayama University, Okayama, Okayama 700-8530, Japan
³⁵Media Communication Center, Osaka Electro-Communication University, Neyagawa, Osaka 572-8530, Japan
³⁶STFC Rutherford Appleton Laboratory, Harwell, Oxford OX11 0QX, United Kingdom
³⁷Department of Physics, Seoul National University, Seoul 151-742, Korea
³⁸Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, United Kingdom
³⁹Department of Informatics in Social Welfare, Shizuoka University of Welfare, Yaizu, Shizuoka 425-8611, Japan
⁴⁰Department of Physics, Sungkyunkwan University, Suwon 440-746, Korea
⁴¹Department of Physics, Faculty of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan
⁴²Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
⁴³Department of Physics, University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
⁴⁴Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study, University of Tokyo, Kashiwa, Chiba 277-8583, Japan
⁴⁵Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
⁴⁶Department of Physics, Faculty of Science and Technology, Tokyo University of Science, Noda, Chiba 278-8510, Japan
⁴⁷TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T2A3, Canada
⁴⁸Department of Engineering Physics, Tsinghua University, Beijing 100084, China
⁴⁹Faculty of Physics, University of Warsaw, Warsaw 02-093, Poland
⁵⁰Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
⁵¹Department of Physics, University of Winnipeg, Manitoba R3J 3L8, Canada
⁵²Department of Physics, Yokohama National University, Yokohama, Kanagawa 240-8501, Japan

^*Corresponding author: twester@bu.edu
^†Also at BMCC/CUNY, Science Department, New York, New York, 1007, USA.
^‡Also at University of Victoria, Department of Physics and Astronomy, P.O. Box 1700 STN CSC, Victoria, British Columbia V8W 2Y2, Canada.

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Phys. Rev. D 109, 072014 – Published 24 April, 2024

DOI: https://doi.org/10.1103/PhysRevD.109.072014

Abstract

We present a measurement of neutrino oscillation parameters with the Super-Kamiokande detector using atmospheric neutrinos from the complete pure-water SK I–V (April 1996–July 2020) dataset, including events from an expanded fiducial volume. The dataset corresponds to 6511.3 live days and an exposure of 484.2 kiloton-years. Measurements of the neutrino oscillation parameters $Δ m_{32}^{2}$ , $\sin^{2} θ_{23}$ , $\sin^{2} θ_{13}$ , $δ_{CP}$ , and the preference for the neutrino mass ordering are presented with atmospheric neutrino data alone, and with constraints on $\sin^{2} θ_{13}$ from reactor neutrino experiments. Our analysis including constraints on $\sin^{2} θ_{13}$ favors the normal mass ordering at the 92.3% level.

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Phys. Rev. D 109, 072014– Published 24 April, 2024

Vol. 109, Iss. 7 — 1 April 2024

Received 9 November 2023
Accepted 14 February 2024

DOI: https://doi.org/10.1103/PhysRevD.109.072014

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.

Published by the American Physical Society

Physical Review D

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Atmospheric neutrino oscillation analysis with neutron tagging and an expanded fiducial volume in Super-Kamiokande I–V

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