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 $\Xi_cN$, $\Lambda_c\Sigma$, $\Xi_c^{\prime}N$, $\Sigma_c\Lambda$, $\Xi_c^*N$, $\Sigma_c^*\Lambda$, $\Sigma_c\Sigma$, and $\Sigma_c^*\Sigma$. Our results can predict several possible molecular candidates, such as a $\Xi_c^{\prime}N$ molecule with $I(J^P)=0(1^-)$, $\Xi_c^{*}N$ molecules with $0(0^-, 1^-, 2^-)$, $\Sigma_c\Sigma$ molecules with $0(1^-)$ and $1(1^-)$, and $\Sigma_c^*\Sigma$ 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 $\Sigma_c^*\Sigma$ shape-type resonance with $1(0^-)$, a $\Lambda_c\Sigma/\Sigma_c\Sigma$ coupled Feshbach-type resonance with $1(1^-)$, and $\Lambda_c\Sigma/\Sigma_c^*\Sigma$ coupled Feshbach-type resonances with $1(0^-, 2^-)$.