Eur. Phys. J. A (2024) 60: 13
https://doi.org/10.1140/epja/s10050-024-01234-5

Regular Article - Theoretical Physics

Strong decays of charmonium-like state Y(4230)

¹ Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Joliot-Curie 6, 141980, Dubna, Russia
² Institute of Physics and Technology, Mongolian Academy of Sciences, Enkh Taivan Avenue 54B, 13330, Ulaanbaatar, Mongolia

^a ganbold@theor.jinr.ru

Received: 26 September 2023
Accepted: 29 December 2023
Published online: 23 January 2024

Abstract

Strong decays of the charmonium-like state Y(4320) have been studied in the framework of the covariant confined quark model. The resonance Y has been interpreted as a four-quark state with molecular-type interpolating current. We evaluate the hidden-charm decay width of Y into a vector and a scalar, with the latter decaying subsequently to a pair of charged pseudoscalar states. The strong decay mode $Y\to {\pi }^{+}{\pi }^{-}J/\mathrm{\Psi }$ has been studied by involving the scalar resonances $f_0(500)$ and $f_0(980)$, considered quark-antiquark states, while the mode $Y\to K^{+}{K}^{-}J/\mathrm{\Psi }$-via $f_0(980)$. We have calculated the partial widths of the related strong decays and the branching ratio $\mathcal{B}(Y\to K^{+}{K}^{-}J/\mathrm{\Psi })$/$\mathcal{B}(Y\to {\pi }^{+}{\pi }^{-}J/\mathrm{\Psi })$, recently determined by the BESIII collaboration. The estimated branching ratio and calculated partial strong decay widths are in reasonable agreement with the latest experimental data.