Resonance states in the potential model

Maeda, Saori*; Oka, Makoto   ; Liu, Y.-R.*

We calculate two-body , and resonance states of (, , or ) and using the complex scaling method. We employ the -CTNN potentials, which were proposed in our previous study, and obtain four resonances near and thresholds. From the analysis by the binding energies of partial channel systems, we conclude that these resonance states are Feshbach resonances. We compare the results with the resonance states in the heavy quark limit, where the and thresholds are degenerate, and find that they form two pairs of the heavy-quark doublets in agreement with the heavy quark spin symmetry.