TY - JOUR
T1 - Diffuse Supernova Neutrino Background Search at Super-Kamiokande
AU - THE SUPER-KAMIOKANDE COLLABORATION
AU - El Hedri, S.
AU - Ashida, Y.
AU - Giampaolo, A.
AU - Abe, K.
AU - Bronner, C.
AU - Hayato, Y.
AU - Hiraide, K.
AU - Ikeda, M.
AU - Kameda, J.
AU - Kanemura, Y.
AU - Kataoka, Y.
AU - Miki, S.
AU - Miura, M.
AU - Moriyama, S.
AU - Nagao, Y.
AU - Nakahata, M.
AU - Nakayama, S.
AU - Okamoto, K.
AU - Pronost, G.
AU - Sekiya, H.
AU - Shiozawa, M.
AU - Sonoda, Y.
AU - Suzuki, Y.
AU - Takeda, A.
AU - Takemoto, Y.
AU - Takenaka, A.
AU - Tanaka, H.
AU - Watanabe, S.
AU - Yano, T.
AU - Han, S.
AU - Kajita, T.
AU - Okumura, K.
AU - Tashiro, T.
AU - Xia, J.
AU - Megias, G. D.
AU - Labarga, L.
AU - Marti, Ll
AU - Zaldivar, B.
AU - Pointon, B. W.
AU - Kearns, E.
AU - Raaf, J. L.
AU - Wan, L.
AU - Wester, T.
AU - Bian, J.
AU - Griskevich, N. J.
AU - Kropp, W. R.
AU - Locke, S.
AU - Mine, S.
AU - Smy, M. B.
AU - Nishimura, Y.
N1 - Publisher Copyright:
© Copyright owned by the author(s).
PY - 2022/3/18
Y1 - 2022/3/18
N2 - We present the results of a search for the Diffuse Supernova Neutrino Background (DSNB) at Super-Kamiokande (SK) that incorporates 22.5 × 2970 kton.days of data from its fourth data-taking phase. Two analyses, with different energy regimes covering the 9.3−81.3 MeV antineutrino energy range, have been developed based on previous SK searches, with substantially improved background modeling and data reduction techniques. Moreover, a combined analysis of nearly 20 years of SK data (1996-2018) has been performed, with a 90% C.L. sensitivity to the DSNB flux comparable to various DSNB predictions. No significant evidence for a DSNB signal has been observed, and both analyses set world-leading limits on the DSNB flux that can reach about 2.7νe.cm−2.s−1 for a wide range of models.
AB - We present the results of a search for the Diffuse Supernova Neutrino Background (DSNB) at Super-Kamiokande (SK) that incorporates 22.5 × 2970 kton.days of data from its fourth data-taking phase. Two analyses, with different energy regimes covering the 9.3−81.3 MeV antineutrino energy range, have been developed based on previous SK searches, with substantially improved background modeling and data reduction techniques. Moreover, a combined analysis of nearly 20 years of SK data (1996-2018) has been performed, with a 90% C.L. sensitivity to the DSNB flux comparable to various DSNB predictions. No significant evidence for a DSNB signal has been observed, and both analyses set world-leading limits on the DSNB flux that can reach about 2.7νe.cm−2.s−1 for a wide range of models.
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M3 - Conference article
AN - SCOPUS:85145260138
SN - 1824-8039
VL - 395
JO - Proceedings of Science
JF - Proceedings of Science
M1 - 1139
T2 - 37th International Cosmic Ray Conference, ICRC 2021
Y2 - 12 July 2021 through 23 July 2021
ER -