Speaker
Prof.
Makoto Oka
(ASRC, Japan Atomic Energy Agency)
Description
Two-body $J^{\pi}= 0^+$, $1^+$ and $2^+$ resonances of the $Y_c$ ($=\Lambda_c$, $\Sigma_c$, or $\Sigma_c^*$) and N systems are analyzed by the use of the complex scaling method. We employ the $Y_c N$ phenomenological potentials, which are composed of the long-range meson-exchange force and the short-range quark exchange force. We find four Feshbach-type resonance states slightly below the $\Sigma_c N$ or $\Sigma_c^* N$ threshold. It is found that the four resonances form two pairs of the heavy-quark doublets in agreement with the heavy quark spin symmetry.
Primary author
Prof.
Makoto Oka
(ASRC, Japan Atomic Energy Agency)
