Search for trilepton nucleon decay via p→e+νν and p→μ+νν in 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 , Y Nakano , S Nakayama , H Sekiya , M Shiozawa , Y Suzuki , A Takeda , H Tanaka , T Tomura , K Ueno , R A Wendell , T Yokozawa , T Irvine , T Kajita , I Kametani , K Kaneyuki , K P Lee , T McLachlan , Y Nishimura , E Richard , K Okumura , L Labarga , P Fernandez , S Berkman , H A Tanaka , S Tobayama , J Gustafson , E Kearns , J L Raaf , J L Stone , L R Sulak , 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 , W E Keig , N Hong , J Y Kim , I T Lim , T Akiri , A Himmel , K Scholberg , C W Walter , T Wongjirad , T Ishizuka , S Tasaka , J S Jang , J G Learned , S Matsuno , S N Smith , 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 , C Bronner , S Hirota , K Huang , K Ieki , T Kikawa , A Minamino , A Murakami , T Nakaya , K Suzuki , S Takahashi , K Tateishi , Y Fukuda , K Choi , Y Itow , G Mitsuka , P Mijakowski , J Hignight , J Imber , C K Jung , C Yanagisawa , H Ishino , A Kibayashi , Y Koshio , T Mori , M Sakuda , R Yamaguchi , T Yano , Y Kuno , R Tacik , S B Kim , H Okazawa , Y Choi , K Nishijima , M Koshiba , Y Suda , Y Totsuka , M Yokoyama , K Martens , Ll Marti , M R Vagins , J F Martin , P de Perio , A Konaka , M J Wilking , S Chen , Y Zhang , K Connolly , R J Wilkes , Physical review letters（2014）
摘要
The trilepton nucleon decay modes p→e+νν and p→μ+νν violate |Δ(B-L)| by two units. Using data from a 273.4 kt yr exposure of Super-Kamiokande a search for these decays yields a fit consistent with no signal. Accordingly, lower limits on the partial lifetimes of τp→e+νν>1.7×10(32) years and τp→μ+νν>2.2×10(32) years at a 90% confidence level are obtained. These limits can constrain Grand Unified Theories which allow for such processes.
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