Updated measurement of time-dependent $CP$-violating observables in $B_s^0\to J/\psi K^{+}{K}^{-}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +910

The decay-time-dependent $CP$ asymmetry in $B_s^0\to J/\psi K^{+}{K}^{-}$ decays is measured using proton-proton collision data, corresponding to an integrated luminosity of $1.9\,\…