Pcs(4459) and possible hidden-charm molecular pentaquarks with strangeness

by Dr Rui Chen (湖南师范大学)

Monday 25 Oct 2021, 10:30 → 11:30 Asia/Shanghai

B105 (CHEP)

The study of new hadron states is closely related to the property of the hadron-hadron interaction. In this seminar, I will introduce my recently works on the strange hidden-charm pentaquarks $P_{cs}(4459)$ observed by the LHCb Collaboration. We perform a single channel and coupled channel analysis on the charm-strange baryon and anti-charmed meson interactions by adopting the one-boson-exchange effective potentials, and find the $P_{cs}(4459)$ can be explained as the coupled $\Xi_c^{(*)}\bar{D}^{(*)}$ molecular state with $I(J^P)=0(3/2^-)$. After that, we study the two-body strong decay properties for the $P_{cs}(4459)$ in the baryon-meson molecular scenario, the obtained results further support $P_{cs}(4459)$ as the coupled $\Xi_c^{(*)}\bar{D}^{(*)}$ molecular state. Meanwhile, we can also predict other possible hidden-charm molecular pentaquark candidates with strangeness $|S|=1,2,3$. Tecent Meeting: https://meeting.tencent.com/dm/jERFwJh3PdsG ID：646 328 378