Exploring the spectroscopic features of double-strangeness tetraquark states

TL;DR

This paper uses the quark model to analyze double-strangeness tetraquark states, identifying potential bound and resonance states with specific quantum numbers and providing predictions for their masses and decay widths.

Contribution

It systematically investigates double-strange tetraquark configurations considering multiple structures and channel coupling, offering new insights into their possible bound and resonance states.

Findings

Identifies two bound states with specific quantum numbers in single-channel analysis.

Predicts a bound state at approximately 1310 MeV considering channel coupling.

Finds a resonance state around 1783 MeV with a decay width of 17 MeV.

Abstract

Since the discovery of the $T_{cc}$ double-charm tetaquark by the LHCb collaboration, the field of the theoretical research on heavy quarks has advanced rapidly, with increasing interest in exploring the light quark sector. In this study, the quark model is employed to systematically analyze the double-strange tetraquark system. Both the meson-meson configuration and diquark-antidiquark configuration are considered. The interactions between hadron pairs under various quantum numbers, as well as the possibilities of bound states and resonances, are evaluated. The results indicate the presence of two bound states, $ \bar{K}^{\ast }\bar{K}$ and $\bar{K}^{\ast }\bar{K}^{\ast}$, with quantum number $I(J^{P})=0(1^{+})$ in single-channel estimations. Additionally, by considering the channel coupling between the two configurations, a bound state with quantum numbers $I(J^{P})=0(1^{+})$ and a mass of approximately $1310$ MeV is obtained. Moreover, through the application of Resonance Ground Method, a resonance state is identified in the $I(J^{P})=0(1^{+})$ $\ssqq$ system, with an estimated mass of around 1783 MeV and a decay width of approximately 17 MeV.