Study of the process $e^{+}{e}^{-}\to K_S^0{K}^{\pm }\ddot{I}{€}^{\mp }\ddot{I}{€}^{+}\ddot{I}{€}^{-}$ in the C.M. energy range 1.6--2.0 GeV with the CMD-3 detector

Abstract

The cross section of the process $e^{+}{e}^{-}\to K_S^0{K}^{\pm }\ddot{I}{€}^{\mp }\ddot{I}{€}^{+}\ddot{I}{€}^{-}$ has been measured for the first time using a data sample of 185.4 pb${}^{-1}$ collected with the CMD-3 detector at the VEPP-2000 $e^{+}{e}^{-}$ collider. With the $K_S^0\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}$ decay detection, 373$\pm$20 and 514$\pm$28 signal events have been selected with six and five reconstructed tracks, respectively, in the center-of-mass energy range 1.6--2.0 GeV. The total systematic uncertainty of the cross section is about 15\%. The study of the production dynamics allows us to extract contribution from the $e^{+}{e}^{-}\to f_1(1285)\ddot{I}{€}^{+}\ddot{I}{€}^{-}$ intermediate state and to measure the corresponding cross section. The intermediate states with the $f_1(1420)$ and $f_1(1510)$ resonances have been observed.

21 pages, 17 figures. arXiv admin note: text overlap with arXiv:1912.05751