Abstract
A search for the decay $K^0_{\scriptscriptstyle S}\to\mu^+\mu^-$ is performed, based on a data sample of proton-proton collisions corresponding to an integrated luminosity of 3 fb$^{-1}$, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The observed yield is consistent with the background-only hypothesis, yielding a limit on the branching fraction of ${\cal B}(K^0_{\scriptscriptstyle S}\to\mu^+\mu^-) <0.8~(1.0) \times 10^{-9}$ at $90\%~(95\%)$ confidence level. This result improves the previous upper limit on the branching fraction by an order of magnitude.
Original language | English |
---|---|
Article number | Aaij:2017tia |
Pages (from-to) | 678 |
Journal | The European Physical Journal C (EPJ C) |
Volume | C77 |
Issue number | 10 |
DOIs | |
Publication status | Published - 13 Oct 2017 |