The properties of $\varphi (2170)$ and its three-body nature

Abstract

We summarize the results we obtained for the partial decay widths of $\varphi (2170)$ into two-body final states formed by a $\bar{K}$ and a Kaonic resonance, like $K(1460)$, $K_1(1270)$, as well as to final states constituted by a $\varphi$ and an $\eta /{\eta }^{\prime }$ mesons. The results obtained are compared with the values extracted from experimental data on the corresponding branching ratios, which were determined by the BESIII collaboration. A reasonable agreement is found, which together with the previous reproduction of the mass, width, and cross section for the process $e^{+}{e}^{-}\to \varphi f_0$ strongly indicates the molecular nature of $\varphi (2170)$ as a $\varphi K\bar{K}$ system.

Comments: Contribution to the proceedings of the XLV Symposium on Nuclear Physics, 8-11 January 2024, México