Study of the process $e^{+}{e}^{-}\to K^{+}{K}^{-}$ in the center-of-mass energy range 1010--1060~MeV with the CMD-3 detector

The process $e^{+}{e}^{-}\to K^{+}{K}^{-}$ has been studied using $1.7\times {10}^6$ events from a data sample corresponding to an integrated luminosity of 5.7 pb${}^{-1}$ collected with the CMD-3 detector in the center-of-mass energy range 1010–1060 MeV. The cross section measured with an about 2% systematic uncertainty and it is used to calculate the contribution to the anomalous magnetic moment of the muon $a_{\mu}^{K^+K^-} = (19.33 \pm 0.40) \times 10^{-10}$,andtoobtainthe$\phi(1020)$ meson parameters. We consider the relationship between the $e^{+}{e}^{-}\to K^{+}{K}^{-}$ and $e^{+}{e}^{-}\to K_S^0{K}_L^0$ cross sections and compare it to the theoretical expectations.