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Search for Nucleon and Dinucleon 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

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

Search results for nucleon decays p→e+X, p→μ+X, n→νγ (where X is an invisible, massless particle) as well as dinucleon decays np→e+ν, np→μ+ν, and np→τ+ν in the Super-Kamiokande experiment are presented. Using single-ring data from an exposure of 273.4kton·yr, a search for these decays yields a result consistent with no signal. Accordingly, lower limits on the partial lifetimes of τp→e+X>7.9×1032yr, τp→μ+X>4.1×1032yr, τn→νγ>5.5×1032yr, τnp→e+ν>2.6×1032yr, τnp→μ+ν>2.2×1032yr, and τnp→τ+ν>2.9×1031yr at a 90% confidence level are obtained. Some of these searches are novel.

Original languageEnglish
Article number121803
JournalPhysical Review Letters
Volume115
Issue number12
DOIs
StatePublished - Sep 18 2015

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