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

LHCb Collaboration

Research output: Contribution to journalArticle

11 Scopus citations


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 (US)
Article number678
JournalEuropean Physical Journal C
Issue number10
StatePublished - Oct 1 2017


ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

Cite this