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

Abstract

The cross section of the process $e^{+}{e}^{-}\to K_S^0{K}^{\pm }{\pi }^{\mp }{\pi }^{+}{\pi }^{-}$ 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 $K_S^0\to {\pi }^{+}{\pi }^{-}$ 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 $e^{+}{e}^{-}\to f_1(1285){\pi }^{+}{\pi }^{-}$ 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.

arXiv comment21 pages, 17 figures. arXiv admin note: text overlap with arXiv:1912.05751

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