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Search for nucleon decay via modes favored by supersymmetric grand unification models in Super-Kamiokande-I

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arxiv hep-ex/0502026 v1 pith:HUA66OO3 submitted 2005-02-15 hep-ex

classification hep-ex
keywords modesnucleontimes10decaygrandmodelssupersymmetricfavored
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

We report the results for nucleon decay searches via modes favored by supersymmetric grand unified models in Super-Kamiokande. Using 1489 days of full Super-Kamiokande-I data, we searched for $p \to \bar{\nu} K^+$, $n \to \bar{\nu} K^0$, $p \to \mu^+ K^0$ and $p \to e^+ K^0$ modes. We found no evidence for nucleon decay in any of these modes. We set lower limits of partial nucleon lifetime 2.3$\times10^{33}$, 1.3$\times10^{32}$, 1.3$\times10^{33}$ and 1.0$\times10^{33}$ years at 90% confidence level for $p \to \bar{\nu} K^+$, $n \to \bar{\nu} K^0$, $p \to \mu^+ K^0$ and $p \to e^+ K^0$ modes, respectively. These results give a strong constraint on supersymmetric grand unification models.

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