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Supernova relic neutrino search at super-Kamiokande

K. Bays⁶, T. Iida¹, K. Abe¹, Y. Hayato^1,3, K. Iyogi¹, J. Kameda¹, Y. Koshio¹, L. Marti¹, M. Miura¹ et al. (Super-Kamiokande Collaboration)

M. Miura¹, S. Moriyama^1,3, M. Nakahata^1,3, S. Nakayama¹, Y. Obayashi¹, H. Sekiya¹, M. Shiozawa^1,3, Y. Suzuki^1,3, A. Takeda¹, Y. Takenaga¹, K. Ueno¹, K. Ueshima¹, S. Yamada¹, T. Yokozawa¹, H. Kaji², T. Kajita^2,3, K. Kaneyuki^2,3, T. McLachlan², K. Okumura², K. P. Lee², K. Martens³, M. Vagins^3,6, L. Labarga⁴, E. Kearns^5,3, M. Litos⁵, J. L. Raaf⁵, J. L. Stone^5,3, L. R. Sulak⁵, W. R. Kropp⁶, S. Mine⁶, C. Regis⁶, A. Renshaw⁶, M. B. Smy^6,3, H. W. Sobel^6,3, K. S. Ganezer⁷, J. Hill⁷, W. E. Keig⁷, S. Cho⁸, J. S. Jang⁸, J. Y. Kim⁸, I. T. Lim⁸, J. Albert⁹, K. Scholberg^9,3, C. W. Walter^9,3, R. Wendell⁹, T. Wongjirad⁹, T. Ishizuka¹⁰, S. Tasaka¹¹, J. G. Learned¹², S. Matsuno¹², S. Smith¹², T. Hasegawa¹³, T. Ishida¹³, T. Ishii¹³, T. Kobayashi¹³, T. Nakadaira¹³, K. Nakamura^13,3, K. Nishikawa¹³, Y. Oyama¹³, K. Sakashita¹³, T. Sekiguchi¹³, T. Tsukamoto¹³, A. T. Suzuki¹⁴, Y. Takeuchi^14,3, M. Ikeda¹⁵, K. Matsuoka¹⁵, A. Minamino¹⁵, A. Murakami¹⁵, T. Nakaya^15,3, Y. Fukuda¹⁶, Y. Itow¹⁷, G. Mitsuka¹⁷, M. Miyake¹⁷, T. Tanaka¹⁷, J. Hignight¹⁸, J. Imber¹⁸, C. K. Jung¹⁸, I. Taylor¹⁸, C. Yanagisawa¹⁸, A. Kibayashi¹⁹, H. Ishino¹⁹, S. Mino¹⁹, M. Sakuda¹⁹, T. Mori¹⁹, H. Toyota¹⁹, Y. Kuno²⁰, S. B. Kim²¹, B. S. Yang²¹, H. Okazawa²², Y. Choi²³, K. Nishijima²⁴, M. Koshiba²⁵, Y. Totsuka²⁵, M. Yokoyama^25,3, Y. Heng²⁶, S. Chen²⁶, H. Zhang²⁶, Z. Yang²⁶, P. Mijakowski²⁷, K. Connolly²⁸, M. Dziomba²⁸, and R. J. Wilkes²⁸ (Super-Kamiokande Collaboration)

¹Kamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu, 506-1205, Japan
²Research Center for Cosmic Neutrinos, Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan
³Institute for the Physics and Mathematics of the Universe, Todai Institutes for Advanced Study, University of Tokyo, Kashiwa, Chiba 277-8582, Japan
⁴Department of Theoretical Physics, University Autonoma Madrid, 28049 Madrid, Spain
⁵Department of Physics, Boston University, Boston, Massachusetts 02215, USA
⁶Department of Physics and Astronomy, University of California, Irvine, Irvine, California 92697-4575, USA
⁷Department of Physics, California State University, Dominguez Hills, Carson, California 90747, USA
⁸Department of Physics, Chonnam National University, Kwangju 500-757, Korea
⁹Department of Physics, Duke University, Durham, North Carolina 27708, USA
¹⁰Junior College, Fukuoka Institute of Technology, Fukuoka, Fukuoka 811-0214, Japan
¹¹Department of Physics, Gifu University, Gifu, Gifu 501-1193, Japan
¹²Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822, USA
¹³High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
¹⁴Department of Physics, Kobe University, Kobe, Hyogo 657-8501, Japan
¹⁵Department of Physics, Kyoto University, Kyoto, Kyoto 606-8502, Japan
¹⁶Department of Physics, Miyagi University of Education, Sendai, Miyagi 980-0845, Japan
¹⁷Solar Terrestrial Environment Laboratory, Nagoya University, Nagoya, Aichi 464-8602, Japan
¹⁸Department of Physics and Astronomy, State University of New York, Stony Brook, New York 11794-3800, USA
¹⁹Department of Physics, Okayama University, Okayama, Okayama 700-8530, Japan
²⁰Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
²¹Department of Physics, Seoul National University, Seoul 151-742, Korea
²²Department of Informatics in Social Welfare, Shizuoka University of Welfare, Yaizu, Shizuoka, 425-8611, Japan
²³Department of Physics, Sungkyunkwan University, Suwon 440-746, Korea
²⁴Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
²⁵The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
²⁶Department of Engineering Physics, Tsinghua University, Beijing, 100084, China
²⁷Institute of Experimental Physics, Warsaw University, 00-681 Warsaw, Poland
²⁸Department of Physics, University of Washington, Seattle, Washington 98195-1560, USA

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Phys. Rev. D 85, 052007 – Published 22 March, 2012

DOI: https://doi.org/10.1103/PhysRevD.85.052007

Abstract

A new Super-Kamiokande search for supernova relic neutrinos was conducted using 2853 live days of data. Sensitivity is now greatly improved compared to the 2003 Super-Kamiokande result, which placed a flux limit near many theoretical predictions. This more detailed analysis includes a variety of improvements such as increased efficiency, a lower energy threshold, and an expanded data set. New combined upper limits on supernova relic neutrino flux are between 2.8 and $3.1 {\bar{ν}}_{e} {cm}^{- 2} s^{- 1} > 16 MeV$ total positron energy (17.3 MeV $E_{ν}$ ).

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Supernova relic neutrino search at super-Kamiokande

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