Improved limit on the branching fraction of the rare decay K0s→μ+μ-

The LHCb Collaboration

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A search for the decay KS0→μ+μ- is performed, based on a data sample of proton-proton collisions corresponding to an integrated luminosity of 3fb-1, collected by the LHCb experiment at centre-of-mass energies of 7 and 8TeV. The observed yield is consistent with the background-only hypothesis, yielding a limit on the branching fraction of B(KS0→μ+μ-)<0.8(1.0)×10-9 at 90%(95%) confidence level. This result improves the previous upper limit on the branching fraction by an order of magnitude.
Original languageEnglish
Article number678
Number of pages12
JournalEuropean Physical Journal C
Issue number10
Publication statusPublished - 2017
Externally publishedYes

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