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Search for nucleon decay into charged antilepton plus meson in 0.316 megaton · years exposure of the Super-Kamiokande water Cherenkov detector

2017; American Physical Society; Volume: 96; Issue: 1 Linguagem: Inglês

10.1103/physrevd.96.012003

2470-0037

K. Abe, C. Bronner, G. Pronost, Y. Hayato, M. Ikeda, K. Iyogi, J. Kameda, Y. Kato, Y. Kishimoto, Ll. Marti, M. Miura, S. Moriyama, M. Nakahata, Y. Nakano, S. Nakayama, Y. Okajima, A. Orii, H. Sekiya, M. Shiozawa, Y. Sonoda, A. Takeda, A. Takenaka, H. Tanaka, S. Tasaka, T. Tomura, R. Akutsu, T. Kajita, K. Kaneyuki, Y. Nishimura, K. Okumura, K. M. Tsui, L. Labarga, P. Fernández, F. d. M. Blaszczyk, J. Gustafson, C. Kachulis, E. Kearns, J. L. Raaf, J. L. Stone, L. Sulak, S. Berkman, S. Tobayama, M. Goldhaber, M. Elnimr, W. R. Kropp, S. Mine, S. Locke, P. Weatherly, M. Smy, H. W. Sobel, Volodymyr Takhistov, K. S. Ganezer, J. Hill, J. Y. Kim, I. T. Lim, R. G. Park, A. Himmel, Z. Li, Erin O’Sullivan, K. Scholberg, C. W. Walter, T. Ishizuka, T. Nakamura, J. S. Jang, K. Choi, J. G. Learned, S. Matsuno, S. N. Smith, J. L. Amey, R. P. Litchfield, W. Y., Y. Uchida, M. O. Wascko, S. Cao, M. Friend, T. Hasegawa, Toru Ishida, T. Ishii, T. Kobayashi, T. Nakadaira, K. Nakamura, Y. Oyama, K. Sakashita, T. Sekiguchi, T. Tsukamoto, KE. Abe, M. Hasegawa, A. T. Suzuki, Y. Takeuchi, T. Yano, T. Hayashino, T. Hiraki, S. Hirota, K. Huang, M. Jiang, KE. Nakamura, T. Nakaya, B. Quilain, N. D. Patel, R. A. Wendell, L. H. V. Anthony, N. McCauley, A. Pritchard, Y. Fukuda, Y. Itow, M. Murase, F. Muto, P. Mijakowski, K. Frankiewicz, C. K. Jung, X. Li, J. L. Palomino, G. Santucci, C. Vilela, M. J. Wilking, C. Yanagisawa, S. Ito, D. Fukuda, H. Ishino, A. Kibayashi, Y. Koshio, Hiroshi Nagata, M. Sakuda, Chenyuan Xu, Y. Kuno, D. Wark, F. Di Lodovico, B. Richards, R. Tacik, S. B. Kim, A. Cole, L.F. Thompson, H. Okazawa, Y. Choi, K. Ito, K. Nishijima, M. Koshiba, Y. Totsuka, Y. Suda, M. Yokoyama, R. G. Calland, M. Hartz, K. Martens, C. Shimpson, Y. Suzuki, M. R. Vagins, J. F. Martin, C. Nantais, H. A. Tanaka, A. Konaka, S. Chen, L. Wan, Y. Zhang, A. Minamino, R. J. Wilkes,

Dark Matter and Cosmic Phenomena

We have searched for proton decays into a charged antilepton (${e}^{+}$, ${\ensuremath{\mu}}^{+}$) plus a meson ($\ensuremath{\eta}$, ${\ensuremath{\rho}}^{0}$, $\ensuremath{\omega}$) and for neutron decays into a charged antilepton (${e}^{+}$, ${\ensuremath{\mu}}^{+}$) plus a meson (${\ensuremath{\pi}}^{\ensuremath{-}}$, ${\ensuremath{\rho}}^{\ensuremath{-}}$) using Super-Kamiokande I-IV data, corresponding to $0.316\text{ }\text{ }\text{megaton}\ifmmode\cdot\else\textperiodcentered\fi{}\text{years}$ of exposure. This measurement updates the previous published result by using 2.26 times more data and improved analysis methods. No significant evidence for nucleon decay is observed and lower limits on the partial lifetime of the nucleon are obtained. The limits range from $3\ifmmode\times\else\texttimes\fi{}{10}^{31}$ to $1\ifmmode\times\else\texttimes\fi{}{10}^{34}\text{ }\text{ }\text{years}$ at 90% confidence level, depending on the decay mode.