# 19th International Conference on Hadron Spectroscopy and Structure in memoriam Simon Eidelman

26-31 July 2021
Mexico City
Mexico/General timezone
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# Is $P_{cs}(4459)$ one state or two?

• Chu-Wen XIAO

## Abstract

Based on the constraints of the heavy quark spin symmetry, we investigate the $P_{cs}(4459)$ state using a coupled channel approach. Before the experimental findings, we had made some predictions. Using the experimental results, one can determine the free parameters. We dynamically reproduce the $P_{cs}(4459)$ state in the coupled channel interactions, which may be a degenerate state. Furthermore, our results also made some more predictions for further experimental studies.