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Li-Cheng Sheng

Publications and source records attributed to Li-Cheng Sheng.

3 recordsLinked to original sources
arXiv2025

Exploring pion emission properties of (strange) hidden-charm molecular pentaquarks in a chiral quark model

The internal structure of the exotic $P_c$ and $P_{cs}$ pentaquarks remains an open question. To address this, we demonstrate that pion emission serves as a sensitive probe by calculating its properties within a molecular scenario using the chiral quark model and coupled-channel effects. Our results reveal a strong dependence of the decay widths on the internal structure and spatial wave functions. We therefore expect this study to stimulate experimental measurements of these decays, which are crucial for determining the nature of these states and guiding the search for further molecular partners.

hep-ph↗
arXiv2024

Exploring the mass spectrum and the electromagnetic properties of the possible $\Xi_{cc}K^{(*)}$ and $\Xi_{cc}\bar{K}^{(*)}$ molecules

Using the one-boson-exchange model, we investigate the interactions between the doubly charmed baryon $\Xi_{cc}(3621)$ and the $S-$wave (anti-)kaon accounting for the $S-D$ wave mixing and coupled-channel effects. We find the coupled $\Xi_{cc}K/\Xi_{cc}K^*$ state with $I(J^P)=0(1/2^-)$, the $\Xi_{cc}K^*$ state with $0(1/2^-)$, the $\Xi_{cc}\bar{K}$ state with $0(1/2^-)$, and the $\Xi_{cc}\bar{K}^*$ states with $0(1/2^-,3/2^-)$ can be recommended as good doubly charmed molecular candidates with strangeness $|S|=1$. We further examine their M1 radiative decay behaviors and magnetic moments within the constituent quark model framework. This information can enhance our understanding of their inner structures, including the distribution of electric charge and the orientation of the constituent quarks' spins.

hep-ph↗
arXiv2024

Predicting possible molecular states of nucleons with $\Xi_c$, $\Xi_c^{*}$, and $\Xi_c^{\prime}$

In the framework of a one-boson-exchange model, we carry out a comprehensive investigation of the $\Xi_cN/\Lambda_c\Sigma/\Xi_c^{\prime}N/\Sigma_c\Lambda/\Xi_c^*N/\Sigma_c^*\Lambda/\Sigma_c\Sigma/\Sigma_c^*\Sigma$ interactions. We consider the $S$-$D$-wave mixing effects and the coupled-channel effects to derive the relevant effective potentials. Our results can predict several possible charm-strange deuteronlike $\Xi_c^{(',*)}N$ hexaquarks, the $\Xi_c^{\prime}N$ molecules with $I(I^P)=0(0^+)$, $0(1^+)$, $1(1^+)$, the $\Xi_c^*N$ molecules with $0(1^+)$, $0(2^+)$, $1(2^+)$, and the coupled $\Xi_cN/\Xi_c^{\prime}N/\Xi_c^*N/\Sigma_c\Sigma/\Sigma_c^*\Sigma$ molecule with $0(1^+)$. We expect the experiments to search for our predictions of the $\Xi_c^{(\prime,*)}N$ bound states.

hep-ph↗