Exotic nuclei with open heavy flavor mesons

Abstract

We propose stable exotic nuclei bound with $\overline{D}$ and $B$ mesons with respect to heavy quark symmetry. We indicate that an approximate degeneracy of $\overline{D}(B)$ and ${\overline{D}}^{*}({B}^{*})$ mesons plays an important role, and discuss the stability of $\overline{D}N$ and $BN$ bound states. We find the binding energies 1.4 MeV and 9.4 MeV for each state in the ${J}^{P}=1/{2}^{\ensuremath{-}}$ with the $I=0$ channel. We discuss also possible existence of exotic nuclei $\overline{D}NN$ and $BNN$.