Speaker
Description
The hidden-charm strong decays of the exotic charmonium-like state $Y(4230)$, recently reported by the BESIII Collaboration, has been investigated in the framework of the covariant confined quark model. The state $Y$ 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 [1]. The strong decay mode $Y\to\pi^{+} \pi^{-}$ has been studied by involving the both scalar resonances $f_0(500)$ and $f_0(980)$, considered quark-antiquark states, while the mode $Y \to K^{+} K^{-}$ - via $f_0(980)$. We have calculated the partial widths of the related strong decays and their branching ratio ${\cal BR}$, recently determined by the BESIII Collaboration. Note, the estimated branching ratio ${\cal BR} = 0.033 \pm 0.005$ is located near the experimental lower bound. The estimated branching ratio and calculated partial strong decay widths of the $Y(4230)$ state [1] do not contradict the latest experimental data and may be tested in future experiments.
[1]. Gurjav Ganbold and M. A. Ivanov, "Strong decays of charmonium-like state $Y(4230)$" // Eur. Phys. J. A 60:13 (2024).
