# Constraints on the K-S(0) -> mu(+) mu(-) Branching Fraction

Aaij, R, Beteta, C Abellan, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Aidala, CA, Aiola, S, Ajaltouni, Z, Akar, S
et al (show 918 more authors) (2020) Constraints on the K-S(0) -> mu(+) mu(-) Branching Fraction. PHYSICAL REVIEW LETTERS, 125 (23). 231801-.

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## Abstract

A search for the decay K_{S}^{0}→μ^{+}μ^{-} is performed using proton-proton collision data, corresponding to an integrated luminosity of 5.6  fb^{-1} and collected with the LHCb experiment during 2016, 2017, and 2018 at a center-of-mass energy of 13 TeV. The observed signal yield is consistent with zero, yielding an upper limit of B(K_{S}^{0}→μ^{+}μ^{-})<2.2×10^{-10} at 90% C.L.. The limit reduces to B(K_{S}^{0}→μ^{+}μ^{-})<2.1×10^{-10} at 90% C.L. once combined with the result from data taken in 2011 and 2012.

Item Type: Article LHCb Collaboration Symplectic Admin 24 Feb 2021 15:26 18 Jan 2023 22:58 10.1103/PhysRevLett.125.231801 https://journals.aps.org/prl/pdf/10.1103/PhysRevLe... https://livrepository.liverpool.ac.uk/id/eprint/3116040