Study of the process $e^{+}{e}^{-}\to K_S^0{K}_L^0$ in the center-of-mass energy range 1004--1060 MeV with the CMD-3 detector at the VEPP-2000 $e^{+}{e}^{-}$ collider

Abstract

The $e^{+}{e}^{-}\to K_S^0{K}_L^0$ cross section has been measured in the center-of-mass energy range 1004--1060 MeV at 25 energy points using $6.1\times 10^5$ events with $K_S^0\to {\pi }^{+}{\pi }^{-}$ decay. The analysis is based on 5.9 pb${}^{-1}$ of an integrated luminosity collected with the CMD-3 detector at the VEPP-2000 $e^{+}{e}^{-}$ collider. To obtain $\varphi (1020)$ meson parameters the measured cross section is approximated according to the Vector Meson Dominance model as a sum of the $\rho ,\omega ,\varphi$-like amplitudes and their excitations. This is the most precise measurement of the $e^{+}{e}^{-}\to K_S^0{K}_L^0$ cross section with a 1.8\% systematic uncertainty.

arXiv comment14 pages, 10 figures, journal paper

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