Hadronic molecules for charmed and bottom baryons near thresholds

Abstract

We study hadronic molecules formed by a heavy meson and a nucleon, $DN$ and ${D}^{*}N$ ($\overline{B}N$ and ${\overline{B}}^{*}N$) systems. Respecting the heavy quark symmetry and chiral symmetry, we consider the $DN\mathrm{\text{\ensuremath{-}}}{D}^{*}N$ ($\overline{B}N\mathrm{\text{\ensuremath{-}}}{\overline{B}}^{*}N$) mixing induced by the one boson exchange potential including the tensor force. We find many bound and resonant states with ${J}^{P}=1/{2}^{\ifmmode\pm\else\textpm\fi{}}$, $3/{2}^{\ifmmode\pm\else\textpm\fi{}}$, $5/{2}^{\ifmmode\pm\else\textpm\fi{}}$, and $7/{2}^{\ensuremath{-}}$ in isospin singlet channels, while we find only a few resonant states with ${J}^{P}=1/{2}^{\ensuremath{-}}$ in isospin triplet channels. The analysis of $DN$ and ${D}^{*}N$ ($\overline{B}N$ and ${\overline{B}}^{*}N$) molecules will be useful to study mass spectra of excited charmed (bottom) baryons with large angular momenta, when their masses are close to the $DN$ and ${D}^{*}N$ ($\overline{B}N$ and ${\overline{B}}^{*}N$) thresholds.