Eur. Phys. J. C (2025) 85: 1460
https://doi.org/10.1140/epjc/s10052-025-15074-0

Regular Article - Theoretical Physics

Emergence of charm-strange dibaryons with negative parity via baryon–baryon interactions

¹ Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, 410081, Changsha, China
² School of Physics and Technology, Nanjing Normal University, 210023, Nanjing, China
³ Hunan Research Center of the Basic Discipline for Quantum Effects and Quantum Technologies, Hunan Normal University, 410081, Changsha, China

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Received: 19 July 2025
Accepted: 14 November 2025
Published online: 23 December 2025

Abstract

Within the framework of the one-boson-exchange model, we systematically perform a coupled channel analysis of the $P-$wave interactions between a charm baryon and light baryon, the involved channels include ${\mathrm{\Xi }}_{c}N$, ${\mathrm{\Lambda }}_c\mathrm{\Sigma }$, ${\mathrm{\Xi }}_c^{\prime }N$, ${\mathrm{\Sigma }}_c\mathrm{\Lambda }$, ${\mathrm{\Xi }}_c^{\ast }N$, ${\mathrm{\Sigma }}_c^{\ast }\mathrm{\Lambda }$, ${\mathrm{\Sigma }}_c\mathrm{\Sigma }$, and ${\mathrm{\Sigma }}_c^{\ast }\mathrm{\Sigma }$. Our results can predict several possible molecular candidates, such as a ${\mathrm{\Xi }}_c^{\prime }N$ molecule with $I(J^P)=0(1^{-})$, $\mathrm{\Xi }_c^{\ast }N$ molecules with $0(0^{-},1^{-},2^{-})$, ${\mathrm{\Sigma }}_c\mathrm{\Sigma }$ molecules with $0(1^{-})$ and $1(1^{-})$, and ${\mathrm{\Sigma }}_c^{\ast }\mathrm{\Sigma }$ molecules with $0(0^{-},1^{-},2^{-})$, and $1(2^{-})$. The coupled channel effects significantly influence the formation of the ${\mathrm{\Sigma }}_c\mathrm{\Sigma }$ molecule with $1(1^{-})$. Furthermore, we analyze the phase shifts for these coupled channel systems. Our analysis not only confirms the existence of the predicted molecules but also identifies potential resonant dibaryons, including a ${\mathrm{\Sigma }}_c\mathrm{\Sigma }$ shape-type resonance with $1(1^{-})$, a ${\mathrm{\Sigma }}_c^{\ast }\mathrm{\Sigma }$ shape-type resonance with $1(0^{-})$, a ${\mathrm{\Lambda }}_c\mathrm{\Sigma }/{\mathrm{\Sigma }}_c\mathrm{\Sigma }$ coupled Feshbach-type resonance with $1(1^{-})$, and ${\mathrm{\Lambda }}_c\mathrm{\Sigma }/{\mathrm{\Sigma }}_c^{\ast }\mathrm{\Sigma }$ coupled Feshbach-type resonances with $1(0^{-},2^{-})$.