Supernova Relic Neutrino search with neutron tagging at Super-Kamiokande-IV

H. Zhang, K. Abe, Y. Hayato, K. Iyogi, J. Kameda, Y. Kishimoto, M. Miura, S. Moriyama, M. Nakahata, Y. Nakano, S. Nakayama, H. Sekiya, M. Shiozawa, Y. Suzuki, A. Takeda, Y. Takenaga, T. Tomura, K. Ueno, T. Yokozawa, R. A. WendellH. Kaji, T. Kajita, K. P. Lee, Y. Nishimura, K. Okumura, T. McLachlan, L. Labarga, S. Barkman, T. S. Tanaka, S. Tobayama, E. Kearns, J. L. Raaf, J. L. Stone, L. R. Sulak, K. Bays, G. Carminati, W. R. Kropp, S. Mine, A. Renshaw, M. B. Smy, H. W. Sobel, K. S. Ganezer, J. Hill, W. E. Keig, J. S. Jang, J. Y. Kim, I. T. Lim, T. Akiri, K. Scholberg, C. W. Walter, T. Wongjirad, T. Ishizuka, S. Tasaka, J. G. Learned, S. Matsuno, S. N. Smith, T. Hasegawa, T. Ishida, T. Ishii, T. Kobayashi, T. Nakadaira, K. Nakamura, K. Nishikawa, Y. Oyama, K. Sakashita, T. Sekiguchi, T. Tsukamoto, A. T. Suzuki, Y. Takeuchi, K. Ieki, M. Ikeda, H. Kikawa, K. Huang, A. Minamino, A. Murakami, T. Nakaya, K. Suzuki, S. Takahashi, Y. Fukuda, K. Choi, Y. Itow, G. Mitsuka, P. Mijakowski, J. Hignight, J. Imber, C. K. Jung, I. Taylor, C. Yanagisawa, Hirokazu Ishino, A. Kibayashi, Yusuke Koshio, T. Mori, Makoto Sakuda, R. Yamaguchi, T. Yano, Y. Kuno, R. Tacik, S. B. Kim, H. Okazawa, Y. Choi, K. Nishijima, M. Koshiba, M. Yokoyama, K. Martens, Ll Marti, M. R. Vagins, J. F. Martin, P. Deperio, A. Konaka, M. J. Wilking, S. Chen, H. Sui, Z. Yang, Y. Zhang, K. Connolly, M. Dziomba, R. J. Wilkes

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Abstract

A search for Supernova Relic Neutrinos ν̄e's is first conducted via inverse-beta-decay by tagging neutron capture on hydrogen at Super-Kamiokande-IV. The neutron tagging efficiency is determined to be (17.74±0.04stat.±1.05sys.)%, while the corresponding accidental background probability is (1.06±0.01 stat.±0.18sys.)%. Using 960 days of data, we obtain 13 inverse-beta-decay candidates in the range of Eν̄e between 13.3 MeV and 31.3 MeV. All of the observed candidates are attributed to background. Upper limits at 90% C.L. are calculated in the absence of a signal.

Original languageEnglish
Pages (from-to)41-46
Number of pages6
JournalAstroparticle Physics
Volume60
DOIs
Publication statusPublished - 2015

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Keywords

  • Hydrogen
  • Neutron tagging
  • Supernova Relic Neutrinos
  • Water Cherenkov detector

ASJC Scopus subject areas

  • Astronomy and Astrophysics

Cite this

Zhang, H., Abe, K., Hayato, Y., Iyogi, K., Kameda, J., Kishimoto, Y., Miura, M., Moriyama, S., Nakahata, M., Nakano, Y., Nakayama, S., Sekiya, H., Shiozawa, M., Suzuki, Y., Takeda, A., Takenaga, Y., Tomura, T., Ueno, K., Yokozawa, T., ... Wilkes, R. J. (2015). Supernova Relic Neutrino search with neutron tagging at Super-Kamiokande-IV. Astroparticle Physics, 60, 41-46. https://doi.org/10.1016/j.astropartphys.2014.05.004