First measurement of neutron capture multiplicity in neutrino-oxygen neutral-current quasielasticlike interactions using an accelerator neutrino beam

作者：K. Abe, S. Abe, R. Akutsu, H. Alarakia-Charles, Y. I. Alj Hakim, S. Alonso Monsalve, L. Anthony, S. Aoki, K. A. Apte, T. Arai, T. Arihara, S. Arimoto, Y. Ashida, E. T. Atkin, N. Kishore Babu, V. A. Baranov, Gary Barker, G. Barr, D. Barrow, Paul Bates, L. Bathe-Peters, M. Batkiewicz, N. Baudis, V. Berardi, L. Berns, S. Bhattacharjee, Adrien Blanchet, A. Blondel, P. M. M. Boistier, S. Bolognesi, S. Bordoni, S.B Boyd, C. Bronner, A. Bubak, M. Buizza Avanzini, J. A. Caballero, F. Cadoux, N. F. Calabria, S. Cao, S. Cap, D Carabadjac, S. L. Cartwright, M. P. Casado, M. G. Catanesi, J. Chakrani, Anne Chalumeau, D. Cherdack, A. Chvirova, J. P. Coleman, G Collazuol, F Cormier, A. A. L. Craplet, Andrew Cudd, D. D’Ago, C. Dalmazzone, T. Daret, Prokar Dasgupta, C. Davis, Yu. I. Davydov, P. de Perio, G. De Rosa, T. Dealtry, C. Densham, A. Dergacheva, Rajat Banerjee, F. Di Lodovico, G. Lopez, S. Dolan, D. Douqa, T. A. Doyle, O. Drapier, K. Duffy, J. Dumarchez, P. Dunne, K. Dygnarowicz, A. Eguchi, J. E. Elias, S. Emery-Schrenk, G. Erofeev, A. Ershova, G. Eurin, D. Fedorova, S. Fedotov, M. Feltre, Lei Feng, D. Ferlewicz, A. J. Finch, M. D. Fitton, C. Forza, M. Friend, Y. Fujii, Y. Fukuda, Y. Furui, J. García-Marcos, A. C. Germer, L. Giannessi, C. Giganti, M Girgus, V. Glagolev, M. Gonin, R. González-Jiménez, J. González Rosa, E. A. G. Goodman, K. Gorshanov, P. Govindaraj, Marco Grassi, M. Guigue, Flynn Guo, D. R. Hadley, S. Han, D. A. Harris, Robert J. Harris, T. Hasegawa, Ciaran Hasnip, S. Hassani, N. C. Hastings, Y. Hayato, I. Heitkamp, D. Henaff, Y. Hino, J. Holeczek, A. Holin, T. Holvey, Nguyễn Thị Hồng Vân, Takashi Honjo, M. C. F. Hooft, K. Hosokawa, Jun Hu, A. K. Ichikawa, K. Ieki, M. Ikeda, T. Ishida, M. Ishitsuka, Hiroshi Itô, S. Ito, A. Izmaylov, N. Jachowicz, S. J. Jenkins, C. Jesús-Valls, Meng Jia, J. J. Jiang, Julie Y. Ji, Thomas Peter Jones, P. Jonsson, S.C. Joshi, M. Kabirnezhad, A. Kaboth, H. Kakuno, J. Kameda, S. Karpova, V. S. Kasturi, Y. Kataoka, T. Katori, Aníbal Kawabata, Yuta Kawamura, M Kawaue, E. Kearns, M. Khabibullin, A. Khotjantsev, T. Kikawa, S. King, V. Kiseeva, J. Kisiel, A. Klustová, L. Kneale, Hiroaki Kobayashi, L. Koch, S. Kodama, M. Kolupanova, A. Konaka, L. L. Kormos, Y. Koshio, K. Kowalik, Y. Kudenko, Yuta Kudo, A. Kumar Jha, R. Kurjata, V. Kurochka, T. Kutter, L. Labarga, Mário Lachat, K. Lachner, J. Łagoda, S.M Lakshmi, M. Lamers James, A. Langella, David Langridge, J. F. Laporte, D. Last, N. Latham, M. Laveder, Luigi Lavitola, M. Lawe, D. Leon Silverio, S. Levorato, S. Lewis, B. Li, C. Lin, R. P. Litchfield, S. L. Liu, W. Li, A. Longhin, A. Lopez Moreno, L. Ludovici, X. L. Lu, T. Lux, L. N. Machado, L. Magaletti, K. Mahn, K. K. Mahtani, S. Manly, A. D. Marino, D. Martin, D. A. Martinez Caicedo, Lluisa Maria Mir Martinez, M. Martini, Takahiko Matsubara, R. Matsumoto, V. Matveev, C. Mauger, K. Mavrokoridis, N. McCauley, K. S. McFarland, C. McGrew, Joseph W. McKean, A. Mefodiev, G. D. Megias, Lucile Mellet, C. Metelko, M. Mezzetto, S. Miki, V. Mikola, E. W. Miller, A. Minamino, O. Mineev, S. Mine, J. Mirabito, M. Miura, S. Moriyama, S. Moriyama, P. Morrison, Th. A. Mueller, D. Munford, Alfonso Muñoz, L. Munteanu, Y. Nagai, T. Nakadaira, K. Nakagiri, M. Nakahata, Y. Nakajima, K. D. Nakamura, Atsushi Nakano, Y. Nakano, S. Nakayama, T. Nakaya, K. Nakayoshi, C. E. R. Naseby, Doan Trang Nguyen, V. Q. Nguyen, K. Niewczas, S. Nishimori, Y. Nishimura, Y. Noguchi, T. Nosek, F. Nova, J. C. Nugent, H. M. O’Keeffe, L. O’Sullivan, R. Okazaki, W. Okinaga, K. Okumura, T. Okusawa, Nobuhiko Onda, N. Ospina, L. Osu, Naoki Otani, Y. Oyama, V. Paolone, J. Pasternak, D. Payne, Michael Pfaff, L. Pickering, B. Popov, A. J. Portocarrero Yrey, M. Posiadała-Zezula, Y. S. Prabhu, Hari Prasad, F. Pupilli, B. Quilain, P. T. Quyen, E. Radicioni, B. Radics, M. A. Ramirez, R. M. Ramsden, P. N. Ratoff, M. Reh, G. Anthony Reina, C. Riccio, D. Riley, E. Rondio, S. Roth, N. Roy, A. Rubbia, L. Russo, A. Rychter, W. Saenz, K. Sakashita, S. Samani, F. Sánchez, E. M. Sandford, Yosuke Sato, T. Schefke, K. Scholberg, M. Scott, Y. Seiya, T. Sekiguchi, H. Sekiya, T. Sekiya, D. Seppala, D. Sgalaberna, A. Shaikhiev, M. Shiozawa, Y. Shiraishi, A. Shvartsman, N. Skrobova, K. Skwarczynski, D. Smyczek, M. Smy, J. T. Sobczyk, H. Sobel, F. J. P. Soler, A. J. Speers, R. Spina, Alok Kumar Srivastava, P. Stowell, Y. Stroke, I. Suslov, A. Suzuki, S. Y. Suzuki, M. Tada, S. Tairafune, A. Takeda, Y. Takeuchi, K. Takeya, H. K. Tanaka, H. Tanigawa, V. V. Tereshchenko, N. Thamm, C. Touramanis, N. Tran, T. Tsukamoto, M. Tzanov, Y. Uchida, M. R. Vagins, M. Varghese, I.I. Vasilyev, G. Vasseur, E. Villa, U. Virginet, Tomislav Vladisavljevic, T. Wachala, S. Wada, Daisuke Wakabayashi, H. T. Wallace, J. Walsh, D. Wark, M. O. Wascko, A. Weber, R. Wendell, M. J. Wilking, C. Wilkinson, J. R. Wilson, K. Wood, C. Wret, Jingkai Xia, K. Yamamoto, Tokonatsu Yamamoto, C. Yanagisawa, Y. F. Yang, T. Yano, N. Yershov, U. Yevarouskaya, M. Yokoyama, Y. Yoshimoto, Noriko Yoshimura, R. Zaki, A. Zalewska, J. Zalipska, G Zarnecki, Jiawen Zhang, Xingyu Zhao, H. Zheng, H. Zhong, Taiyu Zhu, M. Ziembicki, E. D. Zimmerman, M. Zito, S. Zsoldos · 发表于：Physical review. D/Physical review. D. · 年份：2025 · DOI：10.1103/qh28-4znk · 被引用次数：7 · 研究领域：Neutrino Physics Research、Particle physics theoretical and experimental studies、Astrophysics and Cosmic Phenomena

We report the first measurement of neutron capture multiplicity in neutrino-oxygen neutral-current quasielasticlike interactions at the gadolinium-loaded Super-Kamiokande detector using the T2K neutrino beam, which has a peak energy of about 0.6 GeV. A total of 30 neutral-current quasielasticlike event candidates were selected from T2K data corresponding to an exposure of 1.76 × 10 20 protons on target. The γ ray signals resulting from neutron captures were identified using a neural network. The flux-averaged mean neutron capture multiplicity was measured to be 1.37 ± 0.33 ( stat . ) − 0.27 + 0.17 ( syst . ) , which is compatible within 2.3 sigma than predictions obtained using our nominal simulation. We discuss potential sources of systematic uncertainty in the prediction and demonstrate that a significant portion of this discrepancy arises from the modeling of hadron-nucleus interactions in the detector medium.