title: Search for trilepton nucleon decay via p→e+νν and p→μ+νν in the Super-Kamiokande experiment.
abstract: 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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authors.affiliation: Kamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu 506-1205, Japan and Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, University of Tokyo, Kashiwa, Chiba 277-8582, Japan.
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authors.affiliation: TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T2A3, Canada.
authors.forename: M J
authors.initials: MJ
authors.lastname: Wilking
authors.affiliation: Department of Engineering Physics, Tsinghua University, Beijing, 100084, China.
authors.forename: S
authors.initials: S
authors.lastname: Chen
authors.affiliation: Department of Engineering Physics, Tsinghua University, Beijing, 100084, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of Physics, University of Washington, Seattle, Washington 98195-1560, USA.
authors.forename: K
authors.initials: K
authors.lastname: Connolly
authors.affiliation: Department of Physics, University of Washington, Seattle, Washington 98195-1560, USA.
authors.forename: R J
authors.initials: RJ
authors.lastname: Wilkes