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Search for nucleon decay into charged antilepton plus meson in Super-Kamiokande i and II

  • H. Nishino
  • , K. Abe
  • , Y. Hayato
  • , T. Iida
  • , M. Ikeda
  • , J. Kameda
  • , Y. Koshio
  • , M. Miura
  • , S. Moriyama
  • , M. Nakahata
  • , S. Nakayama
  • , Y. Obayashi
  • , H. Sekiya
  • , M. Shiozawa
  • , Y. Suzuki
  • , A. Takeda
  • , Y. Takenaga
  • , Y. Takeuchi
  • , K. Ueno
  • , K. Ueshima
  • H. Watanabe, S. Yamada, S. Hazama, I. Higuchi, C. Ishihara, H. Kaji, T. Kajita, K. Kaneyuki, G. Mitsuka, K. Okumura, N. Tanimoto, F. Dufour, E. Kearns, M. Litos, J. L. Raaf, J. L. Stone, L. R. Sulak, M. Goldhaber, K. Bays, J. P. Cravens, W. R. Kropp, S. Mine, C. Regis, M. B. Smy, H. W. Sobel, K. S. Ganezer, J. Hill, W. E. Keig, J. S. Jang, J. Y. Kim, I. T. Lim, J. B. Albert, K. Scholberg, C. W. Walter, R. Wendell, T. Ishizuka, S. Tasaka, J. G. Learned, S. Matsuno, Y. Watanabe, 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, A. Minamino, T. Nakaya, M. Yokoyama, Y. Fukuda, Y. Itow, T. Tanaka, C. K. Jung, G. Lopez, C. McGrew, C. Yanagisawa, N. Tamura, Y. Idehara, M. Sakuda, Y. Kuno, M. Yoshida, S. B. Kim, B. S. Yang, H. Okazawa, Y. Choi, H. K. Seo, Y. Furuse, K. Nishijima, Y. Yokosawa, M. Koshiba, Y. Totsuka, M. R. Vagins, S. Chen, Y. Heng, J. Liu, Z. Yang, H. Zhang, D. Kielczewska, K. Connolly, E. Thrane, R. J. Wilkes
  • The University of Tokyo
  • University of California at Berkeley
  • Boston University
  • Brookhaven National Laboratory
  • University of California at Irvine
  • California State University Dominguez Hills
  • Chonnam National University
  • Duke University
  • Fukuoka Institute of Technology
  • Gifu University
  • University of Hawai'i at Mānoa
  • Kanagawa University
  • High Energy Accelerator Research Organization, Tsukuba
  • Kobe University
  • Kyoto University
  • Miyagi University of Education
  • Nagoya University
  • Stony Brook University
  • Niigata University
  • Okayama University
  • The University of Osaka
  • Seoul National University
  • Shizuoka University of Welfare
  • Sungkyunkwan University
  • Tokai University
  • Tsinghua University
  • University of Warsaw
  • University of Washington

Research output: Contribution to journalArticlepeer-review

88 Scopus citations

Abstract

Searches for a nucleon decay into a charged antilepton (e + or μ +) plus a light meson (π0, π -, η, ρ0, ρ -, ω) were performed using the Super-Kamiokande I and II data. Twelve nucleon decay modes were searched for. The total exposure is 140.9kiloton•years, which includes a 91.7kiloton•year exposure (1489.2 live days) of Super-Kamiokande-I and a 49.2kiloton•year exposure (798.6 live days) of Super-Kamiokande II. The number of candidate events in the data was consistent with the atmospheric neutrino background expectation. No significant evidence for a nucleon decay was observed in the data. Thus, lower limits on the nucleon partial lifetime at 90% confidence level were obtained. The limits range from 3.6×1031 to 8.2×1033years, depending on the decay modes.

Original languageEnglish
Article number112001
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume85
Issue number11
DOIs
StatePublished - Jun 5 2012

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