Search for the rare decay B+μ+μ-μ+νμ

Peter Clarke, Robert Currie, Stephan Eisenhardt, Silvia Gambetta, Franz Muheim, Matthew Needham, Marco Pappagallo, Mark Williams, LHCb Collaboration

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Abstract

A search for the rare leptonic decay ${{{B} ^+}} \!\rightarrow {\mu ^+} {\mu ^-} {\mu ^+} {{\upnu } _\mu } $ is performed using proton-proton collision data corresponding to an integrated luminosity of $4.7 \, {\hbox {fb}}^{-1}$ collected by the LHCb experiment. The search is carried out in the region where the lowest of the two ${\mu ^+\mu ^-} $ mass combinations is below $980 {\mathrm {\,MeV\!/}c^2} $ . The data are consistent with the background-only hypothesis and an upper limit of $1.6 \times 10^{-8}$ at 95% confidence level is set on the branching fraction in the stated kinematic region.
Original languageEnglish
Article number675
JournalEuropean Physical Journal C
VolumeC79
Issue number8
DOIs
Publication statusPublished - 13 Aug 2019

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