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

Super-Kamiokande collaboration

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

Super-Kamiokande collaboration

Physics and Astronomy

Okayama University
The University of Tokyo
University of California at Irvine
Universidad Autónoma de Madrid
British Columbia Institute of Technology
TRIUMF
Boston University

Research output: Contribution to journal › Conference article › peer-review

Abstract

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.

Original language	English
Article number	1173
Journal	Proceedings of Science
Volume	444
State	Published - Sep 27 2024
Event	38th International Cosmic Ray Conference, ICRC 2023 - Nagoya, Japan Duration: Jul 26 2023 → Aug 3 2023

Cite this

@article{9906b66c31094ff296aeb631349bc441,

title = "First result of a search for Diffuse Supernova Neutrino Background in SK-Gd experiment",

abstract = "Since 2020, Super-Kamiokande (SK) detector has been updated by loading gadolinium (Gd) as a new experimental phase, {\textquoteleft}SK-Gd.{\textquoteright} 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.",

author = "\{Super-Kamiokande collaboration\} and M. Harada and K. Abe and C. Bronner and Y. Hayato and K. Hiraide and K. Hosokawa and K. Ieki and M. Ikeda and J. Kameda and Y. Kanemura and R. Kaneshima and Y. Kashiwagi and Y. Kataoka and S. Miki and S. Mine and M. Miura and S. Moriyama and Y. Nakano and M. Nakahata and S. Nakayama and Y. Noguchi and K. Sato and H. Sekiya and H. Shiba and K. Shimizu and M. Shiozawa and Y. Sonoda and Y. Suzuki and A. Takeda and Y. Takemoto and H. Tanaka and T. Yano and S. Han and T. Kajita and K. Okumura and T. Tashiro and T. Tomiya and X. Wang and S. Yoshida and P. Fernandez and L. Labarga and N. Ospina and B. Zaldivar and Pointon, \{B. W.\} and E. Kearns and Raaf, \{J. L.\} and L. Wan and T. Wester and J. Bian and Jung, \{C. K.\}",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons.; 38th International Cosmic Ray Conference, ICRC 2023 ; Conference date: 26-07-2023 Through 03-08-2023",

year = "2024",

month = sep,

day = "27",

language = "English",

volume = "444",

journal = "Proceedings of Science",

issn = "1824-8039",

}

TY - JOUR

T1 - First result of a search for Diffuse Supernova Neutrino Background in SK-Gd experiment

AU - Super-Kamiokande collaboration

AU - Harada, M.

AU - Abe, K.

AU - Bronner, C.

AU - Hayato, Y.

AU - Hiraide, K.

AU - Hosokawa, K.

AU - Ieki, K.

AU - Ikeda, M.

AU - Kameda, J.

AU - Kanemura, Y.

AU - Kaneshima, R.

AU - Kashiwagi, Y.

AU - Kataoka, Y.

AU - Miki, S.

AU - Mine, S.

AU - Miura, M.

AU - Moriyama, S.

AU - Nakano, Y.

AU - Nakahata, M.

AU - Nakayama, S.

AU - Noguchi, Y.

AU - Sato, K.

AU - Sekiya, H.

AU - Shiba, H.

AU - Shimizu, K.

AU - Shiozawa, M.

AU - Sonoda, Y.

AU - Suzuki, Y.

AU - Takeda, A.

AU - Takemoto, Y.

AU - Tanaka, H.

AU - Yano, T.

AU - Han, S.

AU - Kajita, T.

AU - Okumura, K.

AU - Tashiro, T.

AU - Tomiya, T.

AU - Wang, X.

AU - Yoshida, S.

AU - Fernandez, P.

AU - Labarga, L.

AU - Ospina, N.

AU - Zaldivar, B.

AU - Pointon, B. W.

AU - Kearns, E.

AU - Raaf, J. L.

AU - Wan, L.

AU - Wester, T.

AU - Bian, J.

AU - Jung, C. K.

PY - 2024/9/27

Y1 - 2024/9/27

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/85189357815

M3 - Conference article

AN - SCOPUS:85189357815

SN - 1824-8039

VL - 444

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 1173

T2 - 38th International Cosmic Ray Conference, ICRC 2023

Y2 - 26 July 2023 through 3 August 2023

ER -

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

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