Charmed dibaryon resonances in the potential quark model

Abstract

Charmed dibaryon states with the spin-parity $J^{\pi }=0^{+}$, $1^{+}$, and $2^{+}$are predicted for the two-body $Y_{c}N$ ($={\Lambda }_c$, ${\Sigma }_c$, or ${\Sigma }_c^{\ast }$) systems. We employ the complex scaling method for the coupled channel Hamiltonian with the $Y_{c}N$-CTNN potentials, which were proposed in our previous study. We find four sharp resonance states near the ${\Sigma }_{c}N$ and ${\Sigma }_c^{\ast }N$ thresholds. From the analysis of the binding energies of partial channel systems, we conclude that these resonance states are Feshbach resonances. We compare the results with the $Y_{c}N$ resonance states in the heavy quark limit, where the ${\Sigma }_{c}N$ and ${\Sigma }_c^{\ast }N$ thresholds are degenerate, and find that they form two pairs of the heavy-quark doublets in agreement with the heavy quark spin symmetry.

Comments: Proceedings of the International Workshop "New Aspects of the Hadron and Astro/Nuclear Physics"