中国物理学会高能物理分会第十一届全国会员代表大会暨学术年会

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.