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

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 $\ddot{I}•(1020)$, $\ddot{I}•(1680)$, $h_1(1415)$, $f_2^{\prime }(1525)$, and $\ddot{I}{•}_3(1850)$. According to our results, $h_1(1911)$ and $X(2300)$ could be well explained as states $h_1(2^1{P}_1)$ and $h_1(3^1{P}_1)$ $s\bar{s}$ states, respectively. Meanwhile, the possible assignments of $X(2000)$, $\hat{I}{\cdot }_2(1870)$, and $\ddot{I}•(2170)$ as $3^3{S}_1$, $1^1{D}_2$, and $2^3{D}_1$ 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.