Supernova relic neutrino search at super-Kamiokande

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 imp...

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Veröffentlicht in:	Physical review. D, Particles, fields, gravitation, and cosmology Particles, fields, gravitation, and cosmology, 2012-03, Vol.85 (5), Article 052007
Hauptverfasser:	Bays, K., Iida, T., Abe, K., Hayato, Y., Iyogi, K., Kameda, J., Koshio, Y., Marti, L., Miura, M., Moriyama, S., Nakahata, M., Nakayama, S., Obayashi, Y., Sekiya, H., Shiozawa, M., Suzuki, Y., Takeda, A., Takenaga, Y., Ueno, K., Ueshima, K., Yamada, S., Yokozawa, T., Kaji, H., Kajita, T., Kaneyuki, K., McLachlan, T., Okumura, K., Lee, K. P., Martens, K., Vagins, M., Labarga, L., Kearns, E., Litos, M., Raaf, J. L., Stone, J. L., Sulak, L. R., Kropp, W. R., Mine, S., Regis, C., Renshaw, A., Smy, M. B., Sobel, H. W., Ganezer, K. S., Hill, J., Keig, W. E., Cho, S., Jang, J. S., Kim, J. Y., Lim, I. T., Albert, J., Scholberg, K., Walter, C. W., Wendell, R., Wongjirad, T., Ishizuka, T., Tasaka, S., Learned, J. G., Matsuno, S., Smith, S., Hasegawa, T., Ishida, T., Ishii, T., Kobayashi, T., Nakadaira, T., Nakamura, K., Nishikawa, K., Oyama, Y., Sakashita, K., Sekiguchi, T., Tsukamoto, T., Suzuki, A. T., Takeuchi, Y., Ikeda, M., Matsuoka, K., Minamino, A., Murakami, A., Nakaya, T., Fukuda, Y., Itow, Y., Mitsuka, G., Miyake, M., Tanaka, T., Hignight, J., Imber, J., Jung, C. K., Taylor, I., Yanagisawa, C., Kibayashi, A., Ishino, H., Mino, S., Sakuda, M., Mori, T., Toyota, H., Kuno, Y., Kim, S. B., Yang, B. S., Okazawa, H., Choi, Y., Nishijima, K., Koshiba, M.
Format:	Artikel
Sprache:	eng
Schlagworte:	Cosmology Flux Gravitation Neutrinos Positrons Searching Supernovas Thresholds
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Zusammenfassung:	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[nu] sub(e) cm super(-2) s super(-1) > 16 MeV total positron energy (17.3 MeV E[nu]).
ISSN:	1550-7998 1550-2368
DOI:	10.1103/PhysRevD.85.052007