Diffuse supernova neutrino background search at Super-Kamiokande

K. Abe; C. Bronner; Y. Hayato; K. Hiraide; M. Ikeda; S. Imaizumi; J. Kameda; Y. Kanemura; Y. Kataoka; S. Miki; M. Miura; S. Moriyama; Y. Nagao; M. Nakahata; S. Nakayama; T. Okada; K. Okamoto; A. Orii; G. Pronost; H. Sekiya; M. Shiozawa; Y. Sonoda; Y. Suzuki; A. Takeda; Y. Takemoto; A. Takenaka; H. Tanaka; S. Watanabe; T. Yano; S. Han; T. Kajita; K. Okumura; T. Tashiro; J. Xia; G. D. Megias; D. Bravo-Berguño; L. Labarga; Ll Marti; B. Zaldivar; B. W. Pointon; F. D.M. Blaszczyk; E. Kearns; J. L. Raaf; J. L. Stone; L. Wan; T. Wester; J. Bian; N. J. Griskevich; W. R. Kropp; S. Locke; S. Mine; M. B. Smy; H. W. Sobel; V. Takhistov; J. Hill; J. Y. Kim; I. T. Lim; R. G. Park; B. Bodur; K. Scholberg; C. W. Walter; S. Cao; L. Bernard; A. Coffani; O. Drapier; S. El Hedri; A. Giampaolo; M. Gonin; Th A. Mueller; P. Paganini; B. Quilain; T. Ishizuka; T. Nakamura; J. S. Jang; J. G. Learned; L. H.V. Anthony; D. Martin; M. Scott; A. A. Sztuc; Y. Uchida; V. Berardi; M. G. Catanesi; E. Radicioni; N. F. Calabria; L. N. Machado; G. De Rosa; G. Collazuol; F. Iacob; M. Lamoureux; M. Mattiazzi; N. Ospina; L. Ludovici; Y. Maekawa; Y. Nishimura; M. Friend; T. Hasegawa; T. Ishida; T. Kobayashi; M. Jakkapu; T. Matsubara; T. Nakadaira; K. Nakamura; Y. Oyama; K. Sakashita; T. Sekiguchi; T. Tsukamoto; Y. Kotsar; Y. Nakano; H. Ozaki; T. Shiozawa; A. T. Suzuki; Y. Takeuchi; S. Yamamoto; A. Ali; Y. Ashida; J. Feng; S. Hirota; T. Kikawa; M. Mori; T. Nakaya; R. A. Wendell; K. Yasutome; P. Fernandez; N. McCauley; P. Mehta; K. M. Tsui; Y. Fukuda; Y. Itow; H. Menjo; T. Niwa; K. Sato; M. Tsukada; J. Lagoda; S. M. Lakshmi; P. Mijakowski; J. Zalipska; J. Jiang; C. K. Jung; C. Vilela; M. J. Wilking; C. Yanagisawa; K. Hagiwara; M. Harada; T. Horai; H. Ishino; S. Ito; H. Kitagawa; Y. Koshio; W. Ma; N. Piplani; S. Sakai; G. Barr; D. Barrow; L. Cook; A. Goldsack; S. Samani; D. Wark; F. Nova; T. Boschi; F. Di Lodovico; J. Gao; J. Migenda; M. Taani; S. Zsoldos; J. Y. Yang; S. J. Jenkins; M. Malek; J. M. McElwee; O. Stone; M. D. Thiesse; L. F. Thompson; H. Okazawa; S. B. Kim; J. W. Seo; I. Yu; K. Nishijima; M. Koshiba; K. Iwamoto; K. Nakagiri; Y. Nakajima; N. Ogawa; M. Yokoyama; K. Martens; M. R. Vagins; M. Kuze; S. Izumiyama; T. Yoshida; M. Inomoto; M. Ishitsuka; H. Ito; T. Kinoshita; R. Matsumoto; K. Ohta; M. Shinoki; T. Suganuma; A. K. Ichikawa; K. Nakamura; J. F. Martin; H. A. Tanaka; T. Towstego; R. Akutsu; V. Gousy-Leblanc; M. Hartz; A. Konaka; P. De Perio; N. W. Prouse; S. Chen; B. D. Xu; Y. Zhang; M. Posiadala-Zezula; D. Hadley; M. O'Flaherty; B. Richards; B. Jamieson; J. Walker; A. Minamino; K. Okamoto; G. Pintaudi; S. Sano; R. Sasaki

doi:10.1103/PhysRevD.104.122002

Diffuse supernova neutrino background search at Super-Kamiokande

K. Abe, C. Bronner, Y. Hayato, K. Hiraide, M. Ikeda, S. Imaizumi, J. Kameda, Y. Kanemura, Y. Kataoka, S. Miki, M. Miura, S. Moriyama, Y. Nagao, M. Nakahata, S. Nakayama, T. Okada, K. Okamoto, A. Orii, G. Pronost, H. SekiyaM. Shiozawa, Y. Sonoda, Y. Suzuki, A. Takeda, Y. Takemoto, A. Takenaka, H. Tanaka, S. Watanabe, T. Yano, S. Han, T. Kajita, K. Okumura, T. Tashiro, J. Xia, G. D. Megias, D. Bravo-Berguño, L. Labarga, Ll Marti, B. Zaldivar, B. W. Pointon, F. D.M. Blaszczyk, E. Kearns, J. L. Raaf, J. L. Stone, L. Wan, T. Wester, J. Bian, N. J. Griskevich, W. R. Kropp, S. Locke, S. Mine, M. B. Smy, H. W. Sobel, V. Takhistov, J. Hill, J. Y. Kim, I. T. Lim, R. G. Park, B. Bodur, K. Scholberg, C. W. Walter, S. Cao, L. Bernard, A. Coffani, O. Drapier, S. El Hedri, A. Giampaolo, M. Gonin, Th A. Mueller, P. Paganini, B. Quilain, T. Ishizuka, T. Nakamura, J. S. Jang, J. G. Learned, L. H.V. Anthony, D. Martin, M. Scott, A. A. Sztuc, Y. Uchida, V. Berardi, M. G. Catanesi, E. Radicioni, N. F. Calabria, L. N. Machado, G. De Rosa, G. Collazuol, F. Iacob, M. Lamoureux, M. Mattiazzi, N. Ospina, L. Ludovici, Y. Maekawa, Y. Nishimura, M. Friend, T. Hasegawa, T. Ishida, T. Kobayashi, M. Jakkapu, T. Matsubara, T. Nakadaira, K. Nakamura, Y. Oyama, K. Sakashita, T. Sekiguchi, T. Tsukamoto, Y. Kotsar, Y. Nakano, H. Ozaki, T. Shiozawa, A. T. Suzuki, Y. Takeuchi, S. Yamamoto, A. Ali, Y. Ashida, J. Feng, S. Hirota, T. Kikawa, M. Mori, T. Nakaya, R. A. Wendell, K. Yasutome, P. Fernandez, N. McCauley, P. Mehta, K. M. Tsui, Y. Fukuda, Y. Itow, H. Menjo, T. Niwa, K. Sato, M. Tsukada, J. Lagoda, S. M. Lakshmi, P. Mijakowski, J. Zalipska, J. Jiang, C. K. Jung, C. Vilela, M. J. Wilking, C. Yanagisawa, K. Hagiwara, M. Harada, T. Horai, H. Ishino, S. Ito, H. Kitagawa, Y. Koshio, W. Ma, N. Piplani, S. Sakai, G. Barr, D. Barrow, L. Cook, A. Goldsack, S. Samani, D. Wark, F. Nova, T. Boschi, F. Di Lodovico, J. Gao, J. Migenda, M. Taani, S. Zsoldos, J. Y. Yang, S. J. Jenkins, M. Malek, J. M. McElwee, O. Stone, M. D. Thiesse, L. F. Thompson, H. Okazawa, S. B. Kim, J. W. Seo, I. Yu, K. Nishijima, M. Koshiba, K. Iwamoto, K. Nakagiri, Y. Nakajima, N. Ogawa, M. Yokoyama, K. Martens, M. R. Vagins, M. Kuze, S. Izumiyama, T. Yoshida, M. Inomoto, M. Ishitsuka, H. Ito, T. Kinoshita, R. Matsumoto, K. Ohta, M. Shinoki, T. Suganuma, A. K. Ichikawa, K. Nakamura, J. F. Martin, H. A. Tanaka, T. Towstego, R. Akutsu, V. Gousy-Leblanc, M. Hartz, A. Konaka, P. De Perio, N. W. Prouse, S. Chen, B. D. Xu, Y. Zhang, M. Posiadala-Zezula, D. Hadley, M. O'Flaherty, B. Richards, B. Jamieson, J. Walker, A. Minamino, K. Okamoto, G. Pintaudi, S. Sano, R. Sasaki

Department of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

60 Citations (Scopus)

Abstract

We have conducted a new search for the diffuse supernova neutrino background (DSNB) flux at Super-Kamiokande (SK), with a 22.5×2970-kton·day exposure from its fourth operational phase IV. With the new analysis we improve on the existing background reduction techniques and systematic uncertainties and take advantage of an improved neutron tagging algorithm to lower the energy threshold compared to the previous phases of SK. This allows for setting the world's most stringent upper limit on the extraterrestrial ν¯e flux, for neutrino energies below 31.3 MeV. The SK-IV results are combined with the ones from the first three phases of SK to perform a joint analysis using 22.5×5823 kton·days of data. This analysis has the world's best sensitivity to the DSNB ν¯e flux, comparable to the predictions from various models. For neutrino energies larger than 17.3 MeV, the new combined 90% CL upper limits on the DSNB ν¯e flux lie around 2.7 cm-2·sec-1, strongly disfavoring the most optimistic predictions. Finally, potentialities of the gadolinium phase of SK and the future Hyper-Kamiokande experiment are discussed.

Original language	English
Article number	122002
Journal	Physical Review D
Volume	104
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevD.104.122002
Publication status	Published - 15 Dec 2021

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10.1103/PhysRevD.104.122002

Cite this

Abe, K., Bronner, C., Hayato, Y., Hiraide, K., Ikeda, M., Imaizumi, S., Kameda, J., Kanemura, Y., Kataoka, Y., Miki, S., Miura, M., Moriyama, S., Nagao, Y., Nakahata, M., Nakayama, S., Okada, T., Okamoto, K., Orii, A., Pronost, G., ... Sasaki, R. (2021). Diffuse supernova neutrino background search at Super-Kamiokande. Physical Review D, 104(12), Article 122002. https://doi.org/10.1103/PhysRevD.104.122002

@article{1b5aafa58b3f4a96a88868061c7086a8,

title = "Diffuse supernova neutrino background search at Super-Kamiokande",

abstract = "We have conducted a new search for the diffuse supernova neutrino background (DSNB) flux at Super-Kamiokande (SK), with a 22.5×2970-kton·day exposure from its fourth operational phase IV. With the new analysis we improve on the existing background reduction techniques and systematic uncertainties and take advantage of an improved neutron tagging algorithm to lower the energy threshold compared to the previous phases of SK. This allows for setting the world's most stringent upper limit on the extraterrestrial ν¯e flux, for neutrino energies below 31.3 MeV. The SK-IV results are combined with the ones from the first three phases of SK to perform a joint analysis using 22.5×5823 kton·days of data. This analysis has the world's best sensitivity to the DSNB ν¯e flux, comparable to the predictions from various models. For neutrino energies larger than 17.3 MeV, the new combined 90% CL upper limits on the DSNB ν¯e flux lie around 2.7 cm-2·sec-1, strongly disfavoring the most optimistic predictions. Finally, potentialities of the gadolinium phase of SK and the future Hyper-Kamiokande experiment are discussed.",

author = "K. Abe and C. Bronner and Y. Hayato and K. Hiraide and M. Ikeda and S. Imaizumi and J. Kameda and Y. Kanemura and Y. Kataoka and S. Miki and M. Miura and S. Moriyama and Y. Nagao and M. Nakahata and S. Nakayama and T. Okada and K. Okamoto and A. Orii and G. Pronost and H. Sekiya and M. Shiozawa and Y. Sonoda and Y. Suzuki and A. Takeda and Y. Takemoto and A. Takenaka and H. Tanaka and S. Watanabe and T. Yano and S. Han and T. Kajita and K. Okumura and T. Tashiro and J. Xia and Megias, {G. D.} and D. Bravo-Bergu{\~n}o and L. Labarga and Ll Marti and B. Zaldivar and Pointon, {B. W.} and Blaszczyk, {F. D.M.} and E. Kearns and Raaf, {J. L.} and Stone, {J. L.} and L. Wan and T. Wester and J. Bian and Griskevich, {N. J.} and Kropp, {W. R.} and S. Locke and S. Mine and Smy, {M. B.} and Sobel, {H. W.} and V. Takhistov and J. Hill and Kim, {J. Y.} and Lim, {I. T.} and Park, {R. G.} and B. Bodur and K. Scholberg and Walter, {C. W.} and S. Cao and L. Bernard and A. Coffani and O. Drapier and {El Hedri}, S. and A. Giampaolo and M. Gonin and Mueller, {Th A.} and P. Paganini and B. Quilain and T. Ishizuka and T. Nakamura and Jang, {J. S.} and Learned, {J. G.} and Anthony, {L. H.V.} and D. Martin and M. Scott and Sztuc, {A. A.} and Y. Uchida and V. Berardi and Catanesi, {M. G.} and E. Radicioni and Calabria, {N. F.} and Machado, {L. N.} and {De Rosa}, G. and G. Collazuol and F. Iacob and M. Lamoureux and M. Mattiazzi and N. Ospina and L. Ludovici and Y. Maekawa and Y. Nishimura and M. Friend and T. Hasegawa and T. Ishida and T. Kobayashi and M. Jakkapu and T. Matsubara and T. Nakadaira and K. Nakamura and Y. Oyama and K. Sakashita and T. Sekiguchi and T. Tsukamoto and Y. Kotsar and Y. Nakano and H. Ozaki and T. Shiozawa and Suzuki, {A. T.} and Y. Takeuchi and S. Yamamoto and A. Ali and Y. Ashida and J. Feng and S. Hirota and T. Kikawa and M. Mori and T. Nakaya and Wendell, {R. A.} and K. Yasutome and P. Fernandez and N. McCauley and P. Mehta and Tsui, {K. M.} and Y. Fukuda and Y. Itow and H. Menjo and T. Niwa and K. Sato and M. Tsukada and J. Lagoda and Lakshmi, {S. M.} and P. Mijakowski and J. Zalipska and J. Jiang and Jung, {C. K.} and C. Vilela and Wilking, {M. J.} and C. Yanagisawa and K. Hagiwara and M. Harada and T. Horai and H. Ishino and S. Ito and H. Kitagawa and Y. Koshio and W. Ma and N. Piplani and S. Sakai and G. Barr and D. Barrow and L. Cook and A. Goldsack and S. Samani and D. Wark and F. Nova and T. Boschi and {Di Lodovico}, F. and J. Gao and J. Migenda and M. Taani and S. Zsoldos and Yang, {J. Y.} and Jenkins, {S. J.} and M. Malek and McElwee, {J. M.} and O. Stone and Thiesse, {M. D.} and Thompson, {L. F.} and H. Okazawa and Kim, {S. B.} and Seo, {J. W.} and I. Yu and K. Nishijima and M. Koshiba and K. Iwamoto and K. Nakagiri and Y. Nakajima and N. Ogawa and M. Yokoyama and K. Martens and Vagins, {M. R.} and M. Kuze and S. Izumiyama and T. Yoshida and M. Inomoto and M. Ishitsuka and H. Ito and T. Kinoshita and R. Matsumoto and K. Ohta and M. Shinoki and T. Suganuma and Ichikawa, {A. K.} and K. Nakamura and Martin, {J. F.} and Tanaka, {H. A.} and T. Towstego and R. Akutsu and V. Gousy-Leblanc and M. Hartz and A. Konaka and {De Perio}, P. and Prouse, {N. W.} and S. Chen and Xu, {B. D.} and Y. Zhang and M. Posiadala-Zezula and D. Hadley and M. O'Flaherty and B. Richards and B. Jamieson and J. Walker and A. Minamino and K. Okamoto and G. Pintaudi and S. Sano and R. Sasaki",

note = "Publisher Copyright: {\textcopyright} 2021 American Physical Society.",

year = "2021",

month = dec,

day = "15",

doi = "10.1103/PhysRevD.104.122002",

language = "English",

volume = "104",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "12",

}

Abe, K, Bronner, C, Hayato, Y, Hiraide, K, Ikeda, M, Imaizumi, S, Kameda, J, Kanemura, Y, Kataoka, Y, Miki, S, Miura, M, Moriyama, S, Nagao, Y, Nakahata, M, Nakayama, S, Okada, T, Okamoto, K, Orii, A, Pronost, G, Sekiya, H, Shiozawa, M, Sonoda, Y, Suzuki, Y, Takeda, A, Takemoto, Y, Takenaka, A, Tanaka, H, Watanabe, S, Yano, T, Han, S, Kajita, T, Okumura, K, Tashiro, T, Xia, J, Megias, GD, Bravo-Berguño, D, Labarga, L, Marti, L, Zaldivar, B, Pointon, BW, Blaszczyk, FDM, Kearns, E, Raaf, JL, Stone, JL, Wan, L, Wester, T, Bian, J, Griskevich, NJ, Kropp, WR, Locke, S, Mine, S, Smy, MB, Sobel, HW, Takhistov, V, Hill, J, Kim, JY, Lim, IT, Park, RG, Bodur, B, Scholberg, K, Walter, CW, Cao, S, Bernard, L, Coffani, A, Drapier, O, El Hedri, S, Giampaolo, A, Gonin, M, Mueller, TA, Paganini, P, Quilain, B, Ishizuka, T, Nakamura, T, Jang, JS, Learned, JG, Anthony, LHV, Martin, D, Scott, M, Sztuc, AA, Uchida, Y, Berardi, V, Catanesi, MG, Radicioni, E, Calabria, NF, Machado, LN, De Rosa, G, Collazuol, G, Iacob, F, Lamoureux, M, Mattiazzi, M, Ospina, N, Ludovici, L, Maekawa, Y, Nishimura, Y, Friend, M, Hasegawa, T, Ishida, T, Kobayashi, T, Jakkapu, M, Matsubara, T, Nakadaira, T, Nakamura, K, Oyama, Y, Sakashita, K, Sekiguchi, T, Tsukamoto, T, Kotsar, Y, Nakano, Y, Ozaki, H, Shiozawa, T, Suzuki, AT, Takeuchi, Y, Yamamoto, S, Ali, A, Ashida, Y, Feng, J, Hirota, S, Kikawa, T, Mori, M, Nakaya, T, Wendell, RA, Yasutome, K, Fernandez, P, McCauley, N, Mehta, P, Tsui, KM, Fukuda, Y, Itow, Y, Menjo, H, Niwa, T, Sato, K, Tsukada, M, Lagoda, J, Lakshmi, SM, Mijakowski, P, Zalipska, J, Jiang, J, Jung, CK, Vilela, C, Wilking, MJ, Yanagisawa, C, Hagiwara, K, Harada, M, Horai, T, Ishino, H, Ito, S, Kitagawa, H, Koshio, Y, Ma, W, Piplani, N, Sakai, S, Barr, G, Barrow, D, Cook, L, Goldsack, A, Samani, S, Wark, D, Nova, F, Boschi, T, Di Lodovico, F, Gao, J, Migenda, J, Taani, M, Zsoldos, S, Yang, JY, Jenkins, SJ, Malek, M, McElwee, JM, Stone, O, Thiesse, MD, Thompson, LF, Okazawa, H, Kim, SB, Seo, JW, Yu, I, Nishijima, K, Koshiba, M, Iwamoto, K, Nakagiri, K, Nakajima, Y, Ogawa, N, Yokoyama, M, Martens, K, Vagins, MR, Kuze, M, Izumiyama, S, Yoshida, T, Inomoto, M, Ishitsuka, M , Ito, H, Kinoshita, T, Matsumoto, R, Ohta, K, Shinoki, M, Suganuma, T, Ichikawa, AK, Nakamura, K, Martin, JF, Tanaka, HA, Towstego, T, Akutsu, R, Gousy-Leblanc, V, Hartz, M, Konaka, A, De Perio, P, Prouse, NW, Chen, S, Xu, BD, Zhang, Y, Posiadala-Zezula, M, Hadley, D, O'Flaherty, M, Richards, B, Jamieson, B, Walker, J, Minamino, A, Okamoto, K, Pintaudi, G, Sano, S & Sasaki, R 2021, 'Diffuse supernova neutrino background search at Super-Kamiokande', Physical Review D, vol. 104, no. 12, 122002. https://doi.org/10.1103/PhysRevD.104.122002

TY - JOUR

T1 - Diffuse supernova neutrino background search at Super-Kamiokande

AU - Abe, K.

AU - Bronner, C.

AU - Hayato, Y.

AU - Hiraide, K.

AU - Ikeda, M.

AU - Imaizumi, S.

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 - Okada, T.

AU - Okamoto, K.

AU - Orii, A.

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 - Bravo-Berguño, D.

AU - Labarga, L.

AU - Marti, Ll

AU - Zaldivar, B.

AU - Pointon, B. W.

AU - Blaszczyk, F. D.M.

AU - Kearns, E.

AU - Raaf, J. L.

AU - Stone, 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 - Sobel, H. W.

AU - Takhistov, V.

AU - Hill, J.

AU - Kim, J. Y.

AU - Lim, I. T.

AU - Park, R. G.

AU - Bodur, B.

AU - Scholberg, K.

AU - Walter, C. W.

AU - Cao, S.

AU - Bernard, L.

AU - Coffani, A.

AU - Drapier, O.

AU - El Hedri, S.

AU - Giampaolo, A.

AU - Gonin, M.

AU - Mueller, Th A.

AU - Paganini, P.

AU - Quilain, B.

AU - Ishizuka, T.

AU - Nakamura, T.

AU - Jang, J. S.

AU - Learned, J. G.

AU - Anthony, L. H.V.

AU - Martin, D.

AU - Scott, M.

AU - Sztuc, A. A.

AU - Uchida, Y.

AU - Berardi, V.

AU - Catanesi, M. G.

AU - Radicioni, E.

AU - Calabria, N. F.

AU - Machado, L. N.

AU - De Rosa, G.

AU - Collazuol, G.

AU - Iacob, F.

AU - Lamoureux, M.

AU - Mattiazzi, M.

AU - Ospina, N.

AU - Ludovici, L.

AU - Maekawa, Y.

AU - Nishimura, Y.

AU - Friend, M.

AU - Hasegawa, T.

AU - Ishida, T.

AU - Kobayashi, T.

AU - Jakkapu, M.

AU - Matsubara, T.

AU - Nakadaira, T.

AU - Nakamura, K.

AU - Oyama, Y.

AU - Sakashita, K.

AU - Sekiguchi, T.

AU - Tsukamoto, T.

AU - Kotsar, Y.

AU - Nakano, Y.

AU - Ozaki, H.

AU - Shiozawa, T.

AU - Suzuki, A. T.

AU - Takeuchi, Y.

AU - Yamamoto, S.

AU - Ali, A.

AU - Ashida, Y.

AU - Feng, J.

AU - Hirota, S.

AU - Kikawa, T.

AU - Mori, M.

AU - Nakaya, T.

AU - Wendell, R. A.

AU - Yasutome, K.

AU - Fernandez, P.

AU - McCauley, N.

AU - Mehta, P.

AU - Tsui, K. M.

AU - Fukuda, Y.

AU - Itow, Y.

AU - Menjo, H.

AU - Niwa, T.

AU - Sato, K.

AU - Tsukada, M.

AU - Lagoda, J.

AU - Lakshmi, S. M.

AU - Mijakowski, P.

AU - Zalipska, J.

AU - Jiang, J.

AU - Jung, C. K.

AU - Vilela, C.

AU - Wilking, M. J.

AU - Yanagisawa, C.

AU - Hagiwara, K.

AU - Harada, M.

AU - Horai, T.

AU - Ishino, H.

AU - Ito, S.

AU - Kitagawa, H.

AU - Koshio, Y.

AU - Ma, W.

AU - Piplani, N.

AU - Sakai, S.

AU - Barr, G.

AU - Barrow, D.

AU - Cook, L.

AU - Goldsack, A.

AU - Samani, S.

AU - Wark, D.

AU - Nova, F.

AU - Boschi, T.

AU - Di Lodovico, F.

AU - Gao, J.

AU - Migenda, J.

AU - Taani, M.

AU - Zsoldos, S.

AU - Yang, J. Y.

AU - Jenkins, S. J.

AU - Malek, M.

AU - McElwee, J. M.

AU - Stone, O.

AU - Thiesse, M. D.

AU - Thompson, L. F.

AU - Okazawa, H.

AU - Kim, S. B.

AU - Seo, J. W.

AU - Yu, I.

AU - Nishijima, K.

AU - Koshiba, M.

AU - Iwamoto, K.

AU - Nakagiri, K.

AU - Nakajima, Y.

AU - Ogawa, N.

AU - Yokoyama, M.

AU - Martens, K.

AU - Vagins, M. R.

AU - Kuze, M.

AU - Izumiyama, S.

AU - Yoshida, T.

AU - Inomoto, M.

AU - Ishitsuka, M.

AU - Ito, H.

AU - Kinoshita, T.

AU - Matsumoto, R.

AU - Ohta, K.

AU - Shinoki, M.

AU - Suganuma, T.

AU - Ichikawa, A. K.

AU - Nakamura, K.

AU - Martin, J. F.

AU - Tanaka, H. A.

AU - Towstego, T.

AU - Akutsu, R.

AU - Gousy-Leblanc, V.

AU - Hartz, M.

AU - Konaka, A.

AU - De Perio, P.

AU - Prouse, N. W.

AU - Chen, S.

AU - Xu, B. D.

AU - Zhang, Y.

AU - Posiadala-Zezula, M.

AU - Hadley, D.

AU - O'Flaherty, M.

AU - Richards, B.

AU - Jamieson, B.

AU - Walker, J.

AU - Minamino, A.

AU - Okamoto, K.

AU - Pintaudi, G.

AU - Sano, S.

AU - Sasaki, R.

PY - 2021/12/15

Y1 - 2021/12/15

N2 - We have conducted a new search for the diffuse supernova neutrino background (DSNB) flux at Super-Kamiokande (SK), with a 22.5×2970-kton·day exposure from its fourth operational phase IV. With the new analysis we improve on the existing background reduction techniques and systematic uncertainties and take advantage of an improved neutron tagging algorithm to lower the energy threshold compared to the previous phases of SK. This allows for setting the world's most stringent upper limit on the extraterrestrial ν¯e flux, for neutrino energies below 31.3 MeV. The SK-IV results are combined with the ones from the first three phases of SK to perform a joint analysis using 22.5×5823 kton·days of data. This analysis has the world's best sensitivity to the DSNB ν¯e flux, comparable to the predictions from various models. For neutrino energies larger than 17.3 MeV, the new combined 90% CL upper limits on the DSNB ν¯e flux lie around 2.7 cm-2·sec-1, strongly disfavoring the most optimistic predictions. Finally, potentialities of the gadolinium phase of SK and the future Hyper-Kamiokande experiment are discussed.

AB - We have conducted a new search for the diffuse supernova neutrino background (DSNB) flux at Super-Kamiokande (SK), with a 22.5×2970-kton·day exposure from its fourth operational phase IV. With the new analysis we improve on the existing background reduction techniques and systematic uncertainties and take advantage of an improved neutron tagging algorithm to lower the energy threshold compared to the previous phases of SK. This allows for setting the world's most stringent upper limit on the extraterrestrial ν¯e flux, for neutrino energies below 31.3 MeV. The SK-IV results are combined with the ones from the first three phases of SK to perform a joint analysis using 22.5×5823 kton·days of data. This analysis has the world's best sensitivity to the DSNB ν¯e flux, comparable to the predictions from various models. For neutrino energies larger than 17.3 MeV, the new combined 90% CL upper limits on the DSNB ν¯e flux lie around 2.7 cm-2·sec-1, strongly disfavoring the most optimistic predictions. Finally, potentialities of the gadolinium phase of SK and the future Hyper-Kamiokande experiment are discussed.

UR - http://www.scopus.com/inward/record.url?scp=85122297564&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.104.122002

DO - 10.1103/PhysRevD.104.122002

M3 - Article

AN - SCOPUS:85122297564

SN - 2470-0010

VL - 104

JO - Physical Review D

JF - Physical Review D

IS - 12

M1 - 122002

ER -

Diffuse supernova neutrino background search at Super-Kamiokande

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