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Study of the pentaquark states

Aug 9, 2022, 3:30 PM
15m
Oral report 强子物理与味物理 Parallel Session I (2):Hadron and Flavor Physics

Speaker

Chu-Wen Xiao (Central South University)

Description

Inspired by the observations of the pentaquark-like states found by LHCb, we investigated these heavy pentaquark states with the coupled channel unitary approach, taking into account the heavy quark spin symmetry and local hidden gauge symmetry. We dynamically reproduced three $P_c$ states and $P_{cs} (4459)$ in the interactions of the channels $\bar{D}^{(*)} \Sigma_c^{(*)}$ and $\bar{D}^{(*)} \Xi_c^{(*,')}$ with their coupled channels, respectively. Furthermore, we also show the results on the two-poles structure of the $\Lambda(1405)$ state in the interactions of $\bar{K}N$ and $\pi\Sigma$ with their coupled channels. Thus, one concluded that these resonances were molecular states.

Primary author

Chu-Wen Xiao (Central South University)

Co-authors

Prof. Bingsong ZOU (ITP, CAS) Dr Jia-Jun Wu (IHEP) Dr Lisheng Geng (Beihang University)

Presentation materials