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

TL;DR

This study predicts several charm-strange dibaryon molecules with negative parity using a coupled channel analysis within the one-boson-exchange model, identifying potential bound states and resonances in baryon-baryon interactions.

Contribution

It provides the first systematic prediction of negative parity charm-strange dibaryons and analyzes their formation mechanisms and resonance behaviors.

Findings

Predicted multiple molecular candidates with specific quantum numbers.

Identified significant coupled channel effects influencing molecule formation.

Discovered potential resonant dibaryons, including shape and Feshbach-type resonances.

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 $1(0^-, 2^-)$.