Search for Astrophysical Electron Antineutrinos in Super-Kamiokande with 0.01% Gadolinium-loaded Water

Wada, K.; Suzuki, S.; Sano, S.; Pintaudi, G.; Minamino, A.; Marti, Ll.; Jamieson, B.; Ali, A.; Richards, B.; O’Flaherty, M.; Nicholson, M.; Hadley, D.; Edwards, R.; Boyd, S. B.; Posiadała-Zezula, Magdalena; Zhang, B.; Xu, B. D.; Chen, S.; Prouse, N. W.; Li, X.; Konaka, A.; Hartz, M.; Gousy-Leblanc, V.; Gaur, R.; Towstego, T.; Tanaka, H. A.; Martin, J. F.; Yamauchi, K.; Suganuma, T.; Shinoki, M.; Shigeta, N.; Ommura, Y.; Matsumoto, R.; Kinoshita, T.; Ito, H.; Ishitsuka, M.; Izumiyama, S.; Kuze, M.; Xia, J.; Vagins, M. R.; Tsui, K. M.; Martens, K.; Perio, P. de; Yokoyama, M.; Watanabe, E.; Taniuchi, N.; Shima, S.; Nakajima, Y.; Nakagiri, K.; Nishijima, K.; Tairafune, S.; Nakamura, K. D.; Ichikawa, A. K.; Yu, I.; Seo, J. W.; Kwon, E.; Kim, S. B.; Okazawa, H.; Wilson, S. T.; Thompson, L. F.; Thiesse, M. D.; McElwee, J. M.; Malek, M.; Kneale, L.; Fannon, J. E. P.; Yoo, J.; Yang, J. Y.; Yang, B. S.; Nova, F.; Holin, A.; Wark, D.; Samani, S.; Cook, L.; Barrow, D.; Barr, G.; Tano, T.; Tada, T.; Sakai, S.; Nakanishi, F.; Koshio, Y.; Kitagawa, H.; Ishino, H.; Hino, Y.; Yanagisawa, C.; Wilking, M. J.; Jung, C. K.; Jiang, J.; Jia, M.; Zalipska, J.; Prabhu, Y. S.; Mijakowski, P.; Mandal, M.; Lakshmi, S. M.; Lagoda, J.; Ninomiya, K.; Menjo, H.; Itow, Y.; Fukuda, Y.; Tarrant, A.; Mehta, P.; McCauley, N.; Jenkins, S. J.; Yasutome, K.; Wendell, R. A.; Nakaya, T.; Mori, M.; Kikawa, T.; Hu, Z.; Hu, J. R.; Feng, L.; Feng, J.; Takeuchi, Y.; Takagi, Y.; Suzuki, A. T.; Ozaki, H.; Kotsar, Y.; Zsoldos, S.; Xie, Z.; Migenda, J.; Katori, T.; Goldsack, A.; Gao, J.; Lodovico, F. Di; Burton, G. T.; Bhuiyan, N.; Tsukamoto, T.; Sekiguchi, T.; Sakashita, K.; Oyama, Y.; Nakamura, K.; Nakadaira, T.; Matsubara, T.; Jakkapu, M.; Kobayashi, T.; Ishida, T.; Hasegawa, T.; Friend, M.; Akutsu, R.; Okazaki, R.; Nishimura, Y.; Maekawa, Y.; Fujisawa, C.; Pronost, G.; Gonin, M.; Ludovici, L.; Mattiazzi, M.; Lamoureux, M.; Iacob, F.; Collazuol, G.; Rosa, G. De; Machado, L. N.; Langella, A.; Calabria, N. F.; Radicioni, E.; Catanesi, M. G.; Berardi, V.; Uchida, Y.; Sztuc, A. A.; Scott, M.; Martin, D.; Anthony, L. H. V.; Cao, S.; Iovine, N.; Choi, K.; Learned, J. G.; Jang, J. S.; Nakamura, T.; Ishizuka, T.; Quilain, B.; Paganini, P.; Santos, A. D.; Mueller, Th. A.; Giampaolo, A.; Drapier, O.; Beauchêne, A.; Walter, C. W.; Scholberg, K.; Bodur, B.; Park, R. G.; Moon, D. H.; Lee, S. H.; Hill, J.; Yankelevich, A.; Takhistov, V.; Sobel, H. W.; Smy, M. B.; Locke, S.; Griskevich, N. J.; Bian, J.; Wester, T.; Wan, L.; Raaf, J. L.; Kearns, E.; Pointon, B. W.; Zaldivar, B.; Ospina, N.; Labarga, L.; Fernandez, P.; Megias, G. D.; Yoshida, S.; Wang, X.; Tomiya, T.; Tashiro, T.; Okumura, K.; Kajita, T.; Han, S.; Yano, T.; Watanabe, S.; Tanaka, H.; Takenaka, A.; Takemoto, Y.; Takeda, A.; Suzuki, Y.; Sonoda, Y.; Shiozawa, M.; Shimizu, K.; Shiba, H.; Sekiya, H.; Sato, K.; Okamoto, K.; Noguchi, Y.; Nakayama, S.; Nakahata, M.; Nakano, Y.; Moriyama, S.; Miura, M.; Mine, S.; Miki, S.; Kataoka, Y.; Kashiwagi, Y.; Kaneshima, R.; Kanemura, Y.; Kameda, J.; Ikeda, M.; Ieki, K.; Hosokawa, K.; Hiraide, K.; Hayato, Y.; Bronner, C.; Abe, K.; Harada, M.

doi:10.3847/2041-8213/ACDC9E

Artykuł w czasopiśmie

Licencja

Dostęp zamknięty

Search for Astrophysical Electron Antineutrinos in Super-Kamiokande with 0.01% Gadolinium-loaded Water

DOI

10.3847/2041-8213/ACDC9E

Autor

Wada, K.

Suzuki, S.

Sano, S.

Pintaudi, G.

Minamino, A.

Marti, Ll.

Jamieson, B.

Ali, A.

Richards, B.

O’Flaherty, M.

Data publikacji

2023

Abstrakt (EN)

The Astrophysical Journal Letters The American Astronomical Society, find out more The Institute of Physics, find out more THE FOLLOWING ARTICLE ISOPEN ACCESS Search for Astrophysical Electron Antineutrinos in Super-Kamiokande with 0.01% Gadolinium-loaded Water M. Harada1, K. Abe2,3, C. Bronner2, Y. Hayato2,3, K. Hiraide2,3, K. Hosokawa2, K. Ieki2,3, M. Ikeda2,3, J. Kameda2,3, Y. Kanemura2Show full author list Published 2023 July 7 • © 2023. The Author(s). Published by the American Astronomical Society. The Astrophysical Journal Letters, Volume 951, Number 2 Citation M. Harada et al 2023 ApJL 951 L27 DOI 10.3847/2041-8213/acdc9e DownloadArticle PDF DownloadArticle ePub Figures Tables References 397 Total downloads 11 citation on Dimensions. Turn on MathJax Share this article Share this content via email Share on Facebook (opens new window) Share on Twitter (opens new window) Share on Mendeley (opens new window) Article and author information Abstract We report the first search result for the flux of astrophysical electron antineutrinos for energies ${ \mathcal O }(10)\,\mathrm{MeV}$ in the gadolinium-loaded Super-Kamiokande (SK) detector. In 2020 June, gadolinium was introduced to the ultrapure water of the SK detector in order to detect neutrons more efficiently. In this new experimental phase, SK-Gd, we can search for electron antineutrinos via inverse beta decay with efficient background rejection thanks to the high efficiency of the neutron tagging technique. In this paper, we report the result for the initial stage of SK-Gd, during 2020 August 26, and 2022 June 1 with a 22.5 × 552 kton · day exposure at 0.01% Gd mass concentration. No significant excess over the expected background in the observed events is found for the neutrino energies below 31.3 MeV. Thus, the flux upper limits are placed at the 90% confidence level. The limits and sensitivities are already comparable with the previous SK result with pure water (22.5 × 2970 kton · day) owing to the enhanced neutron tagging. Operation with Gd increased to 0.03% started in 2022 June

Dyscyplina PBN

nauki fizyczne

Czasopismo

Astrophysical Journal Letters

Tom

951

Zeszyt

2

Strony od-do

L27

ISSN

2041-8205

Link do źródła

https://iopscience.iop.org/article/10.3847/2041-8213/acdc9e

Licencja otwartego dostępu

Dostęp zamknięty

Licencja

Search for Astrophysical Electron Antineutrinos in Super-Kamiokande with 0.01% Gadolinium-loaded Water

Opcje

DOI

Abstrakt (EN)