Study of the process e+e−→KS0K±π∓π+π− in the c.m. energy range 1.6–2.0 GeV with the CMD-3 detector

• Published in: Physics letters. B Vol. 836; p. 137606
• Main 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., Epshteyn, L.B., Erofeev, A.L., Fedotovich, G.V., Gorkovenko, A.O., Grancagnolo, F.J., Grebenuk, A.A., Gribanov, S.S., Grigoriev, D.N., Ignatov, F.V., Ivanov, V.L., Karpov, S.V., Kazanin, V.F., Kirpotin, A.N., Koop, I.A., Korobov, A.A., Kozyrev, A.N., Kozyrev, E.A., Krokovny, P.P., Kuzmin, A.S., Logashenko, I.B., Lukin, P.A., Mikhailov, K.Yu, Obraztsov, I.V., Okhapkin, V.S., Otboev, A.V., Pestov, Yu.N., Popov, A.S., Razuvaev, G.P., Rogovsky, Yu.A., Ruban, A.A., Ryskulov, N.M., Ryzhenenkov, A.E., Semenov, A.V., Senchenko, A.I., Shatunov, P.Yu, Shatunov, Yu.M., Shebalin, V.E., Shemyakin, D.N., Shwartz, B.A., Shwartz, D.B., Sibidanov, A.L., Solodov, E.P., Titov, V.M., Talyshev, A.A., Tolmachev, S.S., Vorobiov, A.I., Zemlyansky, I.M., Zhadan, D.S., Zubakin, A.S., Yudin, Yu.V.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 10.01.2023; Elsevier
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/j.physletb.2022.137606

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.