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Search for proton decay via prightarrow μ^+K⁰ in 0.37 megaton-years exposure of Super-Kamiokande

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arxiv 2208.13188 v1 pith:NCVH5PDO submitted 2022-08-28 hep-ex

Search for proton decay via prightarrow μ^+K⁰ in 0.37 megaton-years exposure of Super-Kamiokande

Super-Kamiokande Collaboration: R. Matsumoto , K. Abe , Y. Hayato , K. Hiraide , K. Ieki , M. Ikeda , J. Kameda , Y. Kanemura
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R. Kaneshima Y. Kashiwagi Y. Kataoka S. Miki S. Mine M. Miura S. Moriyama Y. Nakano M. Nakahata S. Nakayama Y. Noguchi K. Okamoto K. Sato H. Sekiya H. Shiba K. Shimizu M. Shiozawa Y. Sonoda Y. Suzuki A. Takeda Y. Takemoto A. Takenaka H. Tanaka S. Watanabe T. Yano S. Han T. Kajita K. Okumura T. Tashiro T. Tomiya X. Wang J. Xia S. Yoshida G. D. Megias P. Fernandez L. Labarga N. Ospina B. Zaldivar B. W. Pointon E. Kearns J. L. Raaf L. Wan T. Wester J. Bian N. J. Griskevich W. R. Kropp S. Locke M. B. Smy H. W. Sobel V. Takhistov A. Yankelevich J. Hill J. Y. Kim I. T. Lim R. G. Park B. Bodur K. Scholberg C. W. Walter L. Bernard A. Coffani O. Drapier S. El Hedri A. Giampaolo Th. A. Mueller A. D. Santos P. Paganini B. Quilain T. Ishizuka T. Nakamura J. S. Jang J. G. Learned K. Choi S. Cao L. H. V. Anthony D. Martin M. Scott A. A. Sztuc Y. Uchida V. Berardi M. G. Catanesi E. Radicioni N. F. Calabria L. N. Machado G. De Rosa G. Collazuol F. Iacob M. Lamoureux M. Mattiazzi L. Ludovici M. Gonin G. Pronost C. Fujisawa Y. Maekawa Y. Nishimura M. Friend T. Hasegawa T. Ishida T. Kobayashi M. Jakkapu T. Matsubara T. Nakadaira K. Nakamura Y. Oyama K. Sakashita T. Sekiguchi T. Tsukamoto T. Boschi F. Di Lodovico J. Gao A. Goldsack T. Katori J. Migenda M. Taani Z. Xie S. Zsoldos Y. Kotsar H. Ozaki A. T. Suzuki Y. Takeuchi S. Yamamoto C. Bronner J. Feng T. Kikawa M. Mori T. Nakaya R. A. Wendell K. Yasutome S. J. Jenkins N. McCauley P. Mehta K. M. Tsui A. Tarrant Y. Fukuda Y. Itow H. Menjo K. Ninomiya J. Lagoda S. M. Lakshmi M. Mandal P. Mijakowski Y. S. Prabhu J. Zalipska M. Jia J. Jiang C. K. Jung M. J. Wilking C. Yanagisawa M. Harada H. Ishino S. Ito H. Kitagawa Y. Koshio W. Ma F. Nakanishi S. Sakai G. Barr D. Barrow L. Cook S. Samani D. Wark A. Holin F. Nova J. Y. Yang M. Malek J. M. McElwee O. Stone M. D. Thiesse L. F. Thompson H. Okazawa S. B. Kim E. Kwon J. W. Seo I. Yu A. K. Ichikawa K. D. Nakamura S. Tairafune K. Nishijima M. Koshiba K. Iwamoto K. Nakagiri Y. Nakajima S. Shima N. Taniuchi M. Yokoyama K. Martens P. de Perio M. R. Vagins M. Kuze S. Izumiyama M. Inomoto M. Ishitsuka H. Ito T. Kinoshita Y. Ommura N. Shigeta M. Shinoki T. Suganuma K. Yamauchi J. F. Martin H. A. Tanaka T. Towstego R. Akutsu V. Gousy-Leblanc M. Hartz A. Konaka X. Li N. W. Prouse S. Chen B. D. Xu B. Zhang M. Posiadala-Zezula S. B. Boyd D. Hadley M. Nicholson M. O'Flaherty B. Richards A. Ali B. Jamieson Ll. Marti A. Minamino G. Pintaudi S. Sano S. Suzuki K. Wada
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classification hep-ex
keywords protonyearscdotdecayeventexposuremtonsearch
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We searched for proton decay via $p\to\mu^+K^0$ in 0.37\,Mton$\cdot$years of data collected between 1996 and 2018 from the Super-Kamiokande water Cherenkov experiment. The selection criteria were defined separately for $K^0_S$ and $K^0_L$ channels. No significant event excess has been observed. As a result of this analysis, which extends the previous search by an additional 0.2\,Mton$\cdot$years of exposure and uses an improved event reconstruction, we set a lower limit of $3.6\times10^{33}$ years on the proton lifetime.

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