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arXiv · 2207.04615

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

3 Collaboration
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Abstract

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

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3 Collaboration. 2022-10-22. Study of the process $e^+e^-\to K_S^0 K^{\pm}π^{\mp} π^+π^-$ in the C.M. energy range 1.6--2.0 GeV with the CMD-3 detector. https://doi.org/10.1016/j.physletb.2022.137606

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