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arXiv · 1305.4391

A Search for Nucleon Decay via $n \rightarrow \barν π^{0}$ and $p \rightarrow \barν π^{+}$ in Super-Kamiokande

Kamiokande Collaboration·K. Abe·Y. Hayato·T. Iida·K. Iyogi·J. Kameda·Y. Koshio·Y. Kozuma·Ll. Marti·M. Miura·S. Moriyama·M. Nakahata·S. Nakayama·Y. Obayashi·H. Sekiya·M. Shiozawa·Y. Suzuki·A. Takeda·Y. Takenaga·K. Ueno·K. Ueshima·S. Yamada·T. Yokozawa·C. Ishihara·H. Kaji·T. Kajita·K. Kaneyuki·K. P. Lee·T. McLachlan·K. Okumura·Y. Shimizu·N. Tanimoto·E. Kearns·M. Litos·J. L. Raaf·J. L. Stone·L. R. Sulak·M. Goldhaber·K. Bays·W. R. Kropp·S. Mine·C. Regis·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·J. B. Albert·K. Scholberg·C. W. Walter·R. Wendell·T. M. 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·M. Ikeda·A. Minamino·T. Nakaya·Y. Fukuda·Y. Itow·G. Mitsuka·T. Tanaka·C. K. Jung·G. D. Lopez·I. Taylor·C. Yanagisawa·H. Ishino·A. Kibayashi·S. Mino·T. Mori·M. Sakuda·H. Toyota·Y. Kuno·M. Yoshida·S. B. Kim·B. S. Yang·H. Okazawa·Y. Choi·K. Nishijima·M. Koshiba·M. Yokoyama
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Abstract

We present the results of searches for nucleon decay via bound neutron to antineutrino plus pizero and proton to antineutrino plus piplus using data from a combined 172.8 kiloton-years exposure of Super-Kamiokande-I, -II, and -III. We set lower limits on the partial lifetime for each of these modes. For antineutrino pizero, the partial lifetime is >1.1x10^{33} years; for antineutrino piplus, the partial lifetime is >3.9x10^{32} years at 90% confidence level.

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Kamiokande Collaboration, K. Abe, Y. Hayato, T. Iida, K. Iyogi, J. Kameda, Y. Koshio, Y. Kozuma, Ll. Marti, M. Miura, S. Moriyama, M. Nakahata, S. Nakayama, Y. Obayashi, H. Sekiya, M. Shiozawa, Y. Suzuki, A. Takeda, Y. Takenaga, K. Ueno, K. Ueshima, S. Yamada, T. Yokozawa, C. Ishihara, H. Kaji, T. Kajita, K. Kaneyuki, K. P. Lee, T. McLachlan, K. Okumura, Y. Shimizu, N. Tanimoto, E. Kearns, M. Litos, J. L. Raaf, J. L. Stone, L. R. Sulak, M. Goldhaber, K. Bays, W. R. Kropp, S. Mine, C. Regis, 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, J. B. Albert, K. Scholberg, C. W. Walter, R. Wendell, T. M. 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, M. Ikeda, A. Minamino, T. Nakaya, Y. Fukuda, Y. Itow, G. Mitsuka, T. Tanaka, C. K. Jung, G. D. Lopez, I. Taylor, C. Yanagisawa, H. Ishino, A. Kibayashi, S. Mino, T. Mori, M. Sakuda, H. Toyota, Y. Kuno, M. Yoshida, S. B. Kim, B. S. Yang, H. Okazawa, Y. Choi, K. Nishijima, M. Koshiba, M. Yokoyama. 2013-05-19. A Search for Nucleon Decay via $n \rightarrow \barν π^{0}$ and $p \rightarrow \barν π^{+}$ in Super-Kamiokande. https://doi.org/10.1103/physrevlett.113.121802

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