$Search for the rare decay $${{{B} ^+}} \!\rightarrow {\mu ^+} {\mu ^-} {\mu ^+} {{\upnu } _\mu } $$ B + → μ + μ - μ + ν μ$

Search for the rare decay $${{{B} ^+}} \!\rightarrow {\mu ^+} {\mu ^-} {\mu ^+} {{\upnu } _\mu } $$ B + → μ + μ - μ + ν μ

Abstract A search for the rare leptonic decay $${{{B} ^+}} \!\rightarrow {\mu ^+} {\mu ^-} {\mu ^+} {{\upnu } _\mu } $$...

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Bibliographic Details
Main Authors:	Aaij, R., Beteta, C. A, Adeva, B., Adinolfi, M., Aidala, C. A, Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A. A, Alkhazov, G., Cartelle, P. A, Jr, A. A A, Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L.
Other Authors:	Massachusetts Institute of Technology. Department of Physics
Format:	Article
Language:	English
Published:	Springer Berlin Heidelberg 2021
Online Access:	https://hdl.handle.net/1721.1/131626

Description
Summary:	Abstract A search for the rare leptonic decay $${{{B} ^+}} \!\rightarrow {\mu ^+} {\mu ^-} {\mu ^+} {{\upnu } _\mu } $$ B + → μ + μ - μ + ν μ is performed using proton-proton collision data corresponding to an integrated luminosity of $$4.7 \, {\hbox {fb}}^{-1}$$ 4.7 fb - 1 collected by the LHCb experiment. The search is carried out in the region where the lowest of the two $${\mu ^+\mu ^-} $$ μ + μ - mass combinations is below $$980 {\mathrm {\,MeV\!/}c^2} $$ 980 MeV / c 2 . The data are consistent with the background-only hypothesis and an upper limit of $$1.6 \times 10^{-8}$$ 1.6 × 10 - 8 at 95% confidence level is set on the branching fraction in the stated kinematic region.