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

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 ${\Xi }_{c}N$, ${\Lambda }_c\Sigma$, ${\Xi }_c^{\prime }N$, ${\Sigma }_c\Lambda$, ${\Xi }_c^{\ast }N$, ${\Sigma }_c^{\ast }\Lambda$, ${\Sigma }_c\Sigma$, and ${\Sigma }_c^{\ast }\Sigma$. Our results can predict several possible molecular candidates, such as a ${\Xi }_c^{\prime }N$ molecule with $I(J^P)=0(1^{-})$, ${\Xi }_c^{\ast }N$ molecules with $0(0^{-},1^{-},2^{-})$, ${\Sigma }_c\Sigma$ molecules with $0(1^{-})$ and $1(1^{-})$, and ${\Sigma }_c^{\ast }\Sigma$ molecules with $0(0^{-},1^{-},2^{-})$, and $1(2^{-})$. The coupled channel effects significantly influence the formation of the ${\Sigma }_c\Sigma$ 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 ${\Sigma }_c\Sigma$ shape-type resonance with $1(1^{-})$, a ${\Sigma }_c^{\ast }\Sigma$ shape-type resonance with $1(0^{-})$, a ${\Lambda }_c\Sigma /{\Sigma }_c\Sigma$ coupled Feshbach-type resonance with $1(1^{-})$, and ${\Lambda }_c\Sigma /{\Sigma }_c^{\ast }\Sigma$ coupled Feshbach-type resonances with $1(0^{-},2^{-})$.

Comments: 15 pages, 3 figures