High Energy Physics - Phenomenology
[Submitted on 21 Sep 2021 (v1), last revised 26 Oct 2021 (this version, v3)]
Title:Investigation of hidden-charm pentaquarks with strangeness $S=-1$
View PDFAbstract:Recently, a new hidden-charm pentaquark state $P_{cs}(4459)$ was reported by the LHCb Collaboration. Stimulated by the fact that all hidden-charm pentaquark states in $S=0$ systems were successfully predicted by our chiral quark model, we extended this study to the $S=-1$ systems. All possible quantum numbers $IJ^P=0(\frac{1}{2})^-$, $0(\frac{3}{2})^-$, $0(\frac{5}{2})^-$, $1(\frac{1}{2})^-$, $1(\frac{3}{2})^-$ and $1(\frac{5}{2})^-$ have been investigated. The calculation results shows that the newly observed state $P_{cs}(4459)$ can be explained as $\Xi_c \bar{D}^*$ molecular state and the quantum number is $0(\frac{1}{2})^-$. In addition, we also find other molecular states $\Xi_c \bar{D}$, $\Xi_c^* \bar{D}$ and $\Xi_c' \bar{D}^*$. It is worth mentioning that $\Xi_c \bar{D}^*$ can form a two-peak structure from states in system $0(\frac{1}{2})^-$ and $0(\frac{3}{2})^-$. The decay width of all molecular states is given with the help of real scaling method. These hidden-charm pentaquark states is expected to be further verified in future experiments.
Submission history
From: Jialun Ping [view email][v1] Tue, 21 Sep 2021 05:41:55 UTC (637 KB)
[v2] Sun, 24 Oct 2021 15:30:04 UTC (660 KB)
[v3] Tue, 26 Oct 2021 14:48:58 UTC (660 KB)
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