Search for Proton Decay via p rightarrow ν K⁺ using 260 kilotoncdotyear data of Super-Kamiokande

The Super-Kamiokande Collaboration: K. Abe , Y. Hayato , K. Iyogi , J. Kameda , M. Miura , S. Moriyama , M. Nakahata , S. Nakayama

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R.A. Wendell H. Sekiya M. Shiozawa Y. Suzuki A. Takeda Y. Takenaga K. Ueno T. Yokozawa H. Kaji T. Kajita K. Kaneyuki K.P. Lee K. Okumura T. McLachlan L. Labarga E. Kearns J.L. Raaf J.L. Stone L.R. Sulak M. Goldhaber K. Bays G. Carminati W.R. Kropp S. Mine 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 T. 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 K. Ieki M. Ikeda H. Kubo A. Minamino A. Murakami T. Nakaya Y. Fukuda K. Choi Y. Itow G. Mitsuka M. Miyake P. Mijakowski J. Hignight J. Imber C.K. Jung I. Taylor C. Yanagisawa H. Ishino A. Kibayashi Y. Koshio T. Mori M. Sakuda J. Takeuchi Y. Kuno S.B. Kim H. Okazawa Y. Choi K. Nishijima M. Koshiba Y. Totsuka M. Yokoyama K. Martens Ll. Marti Y. Obayashi M.R. Vagins S. Chen H. Sui Z. Yang H. Zhang K. Connolly M. Dziomba R.J. Wilkes

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classification ✦ hep-ex

keywords protondecaycdotdatakilotonrightarrowsuper-kamiokandeyear

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We have searched for proton decay via $p \rightarrow \nu K^{+}$ using Super-Kamiokande data from April 1996 to February 2013, 260 kiloton$\cdot$year exposure in total. No evidence for this proton decay mode is found. A lower limit of the proton lifetime is set to $5.9 \times 10^{33}$ years at 90% confidence level.

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hep-ph 2026-05 unverdicted novelty 4.0

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