Strangeonium spectrum with the screening effects and interpretation of $h_1(1911)$ and $X(2300)$ observed by BESIII

TL;DR

This paper investigates the strangeonium meson spectrum using a modified Godfrey-Isgur model with screening effects, explaining new BESIII states and predicting properties of various s-sbar states for future experimental validation.

Contribution

It introduces a modified model considering screening effects to better explain recent BESIII observations and provides detailed predictions for strangeonium states' masses and decay widths.

Findings

$h_1(1911)$ is identified as $h_1(2^1P_1)$ s-sbar state.

$X(2300)$ is identified as $h_1(3^1P_1)$ s-sbar state.

Masses and widths of multiple s-sbar states are predicted and compared.

Abstract

Motivated by two news states $h_1(1911)$ and $X(2300)$ observed by BESIII, we have investigated the mass spectrum and the strong decay properties of the strangeonium mesons within the modified Godfrey-Isgur model by considering the screening effects. We have determined the free parameters using the masses and widths of the well established $s\bar{s}$ states $\phi(1020)$, $\phi(1680)$, $h_1(1415)$, $f_2^\prime(1525)$, and $\phi_3(1850)$. According to our results, $h_1(1911)$ and $X(2300)$ could be well explained as states $h_1(2^1P_1)$ and $h_1(3^1P_1)$ $s\bar{s}$ states, respectively. Meanwhile, the possible assignments of $X(2000)$, $\eta_2(1870)$, and $\phi(2170)$ as $3^3S_1$, $1^1D_2$, and $2^3D_1$ are also discussed. Furthermore, the masses and widths of the $2S$, $3S$, $1P$, $2P$, $3P$, $1D$, and $2D$ $s\bar{s}$ states are also given and compared with various theoretical predictions, which is helpful for the observations and confirmations of these states in future.