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First result of a search for Diffuse Supernova Neutrino Background in SK-Gd experiment

Publication ,  Conference
Harada, M; Abe, K; Bronner, C; Hayato, Y; Hiraide, K; Hosokawa, K; Ieki, K; Ikeda, M; Kameda, J; Kanemura, Y; Kaneshima, R; Kashiwagi, Y ...
Published in: Proceedings of Science
September 27, 2024

Since 2020, Super-Kamiokande (SK) detector has been updated by loading gadolinium (Gd) as a new experimental phase, ‘SK-Gd.’ In the SK-Gd experiment, we can search low-energy electron antineutrinos via inverse-beta decay with efficient neutron identification thanks to high cross-section and high-energy gamma-ray emission of thermal neutron capture on Gd. Until July 2022, the observation is operated with the 0.01% Gd mass concentration. The neutron capture fraction on Gd is about 50% in this situation. In this paper, the first search result for the flux of astrophysical electron antineutrinos for the energy range of O(10) MeV in SK-Gd with a 22.5 × 552 kton·day exposure at 0.01% Gd mass concentration of the initial stage of SK-Gd is reported.

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Published In

Proceedings of Science

EISSN

1824-8039

Publication Date

September 27, 2024

Volume

444
 

Citation

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Harada, M., Abe, K., Bronner, C., Hayato, Y., Hiraide, K., Hosokawa, K., … Friend, M. (2024). First result of a search for Diffuse Supernova Neutrino Background in SK-Gd experiment. In Proceedings of Science (Vol. 444).
Harada, M., K. Abe, C. Bronner, Y. Hayato, K. Hiraide, K. Hosokawa, K. Ieki, et al. “First result of a search for Diffuse Supernova Neutrino Background in SK-Gd experiment.” In Proceedings of Science, Vol. 444, 2024.
Harada M, Abe K, Bronner C, Hayato Y, Hiraide K, Hosokawa K, et al. First result of a search for Diffuse Supernova Neutrino Background in SK-Gd experiment. In: Proceedings of Science. 2024.
Harada, M., et al. “First result of a search for Diffuse Supernova Neutrino Background in SK-Gd experiment.” Proceedings of Science, vol. 444, 2024.
Harada M, Abe K, Bronner C, Hayato Y, Hiraide K, Hosokawa K, Ieki K, Ikeda M, Kameda J, Kanemura Y, Kaneshima R, Kashiwagi Y, Kataoka Y, Miki S, Mine S, Miura M, Moriyama S, Nakano Y, Nakahata M, Nakayama S, Noguchi Y, Sato K, Sekiya H, Shiba H, Shimizu K, Shiozawa M, Sonoda Y, Suzuki Y, Takeda A, Takemoto Y, Tanaka H, Yano T, Han S, Kajita T, Okumura K, Tashiro T, Tomiya T, Wang X, Yoshida S, Fernandez P, Labarga L, Ospina N, Zaldivar B, Pointon BW, Kearns E, Raaf JL, Wan L, Wester T, Bian J, Griskevich NJ, Locke S, Smy MB, Sobel HW, Takhistov V, Yankelevich A, Hill J, Lee SH, Moon DH, Park RG, Bodur B, Scholberg K, Walter CW, Beauchêne A, Drapier O, Giampaolo A, Mueller TA, Santos AD, Paganini P, Quilain B, Nakamura T, Jang JS, Machado LN, Learned JG, Choi K, Iovine N, Cao S, Anthony LHV, Martin D, Prouse NW, Scott M, Sztuc AA, Uchida Y, Berardi V, Catanesi MG, Radicioni E, Calabria NF, Langella A, De Rosa G, Collazuol G, Iacob F, Mattiazzi M, Ludovici L, Gonin M, Pronost G, Fujisawa C, Maekawa Y, Nishimura Y, Okazaki R, Akutsu R, Friend M. First result of a search for Diffuse Supernova Neutrino Background in SK-Gd experiment. Proceedings of Science. 2024.

Published In

Proceedings of Science

EISSN

1824-8039

Publication Date

September 27, 2024

Volume

444