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29 March 2024
 
  » arxiv » 1508.5530

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Search for Nucleon and Di-nucleon Decays with an Invisible Particle and a Charged Lepton in the Final State at the Super-Kamiokande Experiment
V. Takhistov ; K. Abe ; Y. Haga ; Y. Hayato ; M. Ikeda ; K. Iyogi ; J. Kameda ; Y. Kishimoto ; M. Miura ; S. Moriyama ; M. Nakahata ; T. Nakajima ; Y. Nakano ; S. Nakayama ; A. Orii ; H. Sekiya ; M. Shiozawa ; A. Takeda ; H. Tanaka ; T. Tomura ; R. A. Wendell ; T. Irvine ; T. Kajita ; I. Kametani ; K. Kaneyuki ; Y. Nishimura ; E. Richard ; K. Okumura ; L. Labarga ; P. Fernandez ; J. Gustafson ; C. Kachulis ; E. Kearns ; J. L. Raaf ; J. L. Stone ; L. R. Sulak ; S. Berkman ; C. M. Nantais ; H. A. Tanaka ; S. Tobayama ; M. Goldhaber ; G. Carminati ; W. R. Kropp ; S. Mine ; P. Weatherly ; A. Renshaw ; M. B. Smy ; H. W. Sobel ; K. S. Ganezer ; B. L. Hartfiel ; J. Hill ; N. Hong ; J. Y. Kim ; I. T. Lim ; A. Himmel ; Z. Li ; K. Scholberg ; C. W. Walter ; T. Wongjirad ; T. Ishizuka ; S. Tasaka ; J. S. Jang ; J. G. Learned ; S. Matsuno ; S. N. Smith ; M. Friend ; T. Hasegawa ; T. Ishida ; T. Ishii ; T. Kobayashi ; T. Nakadaira ; K. Nakamura ; Y. Oyama ; K. Sakashita ; T. Sekiguchi ; T. Tsukamoto ; A. T. Suzuki ; Y. Takeuchi ; T. Yano ; S. Hirota ; K. Huang ; K. Ieki ; T. Kikawa ; A. Minamino ; T. Nakaya ; K. Suzuki ; S. Takahashi ; Y. Fukuda ; K. Choi ; Y. Itow ; T. Suzuki ; P. Mijakowski ; K. Frankiewicz ; J. Hignight ; J. Imber ; C. K. Jung ; X. Li ; J. L. Palomino ; M. J. Wilking ; C. Yanagisawa ; H. Ishino ; T. Kayano ; A. Kibayashi ; Y. Koshio ; T. Mori ; M. Sakuda ; Y. Kuno ; R. Tacik ; S. B. Kim ; H. Okazawa ; Y. Choi ; K. Nishijima ; M. Koshiba ; Y. Suda ; Y. Totsuka ; M. Yokoyama ; C. Bronner ; M. Hartz ; K. Martens ; Ll. Marti ; Y. Suzuki ; M. R. Vagins ; J. F. Martin ; P. de Perio ; A. Konaka ; S. Chen ; Y. Zhang ; R. J. Wilkes ;
Date 22 Aug 2015
AbstractSearch results for nucleon decays $p ightarrow e^+X$, $p ightarrow mu^+X$, $n ightarrow ugamma$ (where $X$ is an invisible, massless particle) as well as di-nucleon decays $np ightarrow e^+ u$, $np ightarrow mu^+ u$ and $np ightarrow au^+ u$ in the Super-Kamiokande experiment are presented. Using single-ring data from an exposure of 273.4 kton $cdot$ years, a search for these decays yields a result consistent with no signal. Accordingly, lower limits on the partial lifetimes of $ au_{p ightarrow e^+X} > 7.9 imes 10^{32}$ years, $ au_{p ightarrow mu^+X} > 4.1 imes 10^{32}$ years, $ au_{n ightarrow ugamma} > 5.5 imes 10^{32}$ years, $ au_{np ightarrow e^+ u} > 2.6 imes 10^{32}$ years, $ au_{np ightarrow mu^+ u} > 2.2 imes 10^{32}$ years and $ au_{np ightarrow au^+ u} > 2.9 imes 10^{31}$ years at a $90 \% $ confidence level are obtained. Some of these searches are novel.
Source arXiv, 1508.5530
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