Study of the process e+e−→K0/SK±π∓π+π− in the c.m. energy range 1.6–2.0 GeV with the CMD-3 detector

Date

2023

Authors

Akhmetshin, R. R.
Amirkhanov, A. N.
Anisenkov, A. V.
Aulchenko, V. M.
Bashtovoy, N. S.
Berkaev, D. E.
Bondar, A. E.
Bragin, A. V.
Eidelman, S. I.
Epifanov, D. A.

Journal Title

Journal ISSN

Volume Title

Publisher

Physics Letters B

Abstract

A cross section of the process e+e−→KS0K±π∓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 KS0→π+π− decay detection, 373±20 and 514±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%. A study of the production dynamics allows us to extract a contribution from the e+e−→f1(1285)π+π− intermediate state and to measure the corresponding cross section. The intermediate states with the f1(1420) and f1(1510) resonances have been observed.

Description

We thank the VEPP-2000 team for the excellent machine operation.

Keywords

Citation

Akhmetshin, R. R., Amirkhanov, A N., Anishenkov, A. V., Aulchenko, V. M., Bashtovoy, N. S., Berkaev, D. E., ... Yudin, Yu. V. (2023). Study of the process e+e−→K0/SK±π∓π+π− in the c.m. energy range 1.6–2.0 GeV with the CMD-3 detector. Physics Letters B, 836, 137606, https://doi.org/10.1016/j.physletb.2022.137606