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

TL;DR

This paper reports the first measurement of the cross section for the process $e^+e^- o K_S^0 K^{\u00b1}\pi^{\ump}\pi^+\pi^-$ in the 1.6--2.0 GeV energy range, identifying intermediate resonances and production dynamics using the CMD-3 detector.

Contribution

The study provides the first measurement of this process's cross section and identifies intermediate resonances, enhancing understanding of hadronic production in electron-positron collisions.

Findings

First measurement of the process cross section in the specified energy range.

Observation of intermediate states with $f_1(1420)$ and $f_1(1510)$ resonances.

Extraction of contributions from specific intermediate states like $f_1(1285)\pi^+\pi^-$.

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.