Effect of different baryon impurities

Abstract

We demonstrate the different effects of different baryon impurities on the static properties of nuclei within the framework of the relativistic mean-field model. Systematic calculations show that ${\ensuremath{\Lambda}}_{c}^{+}$ and ${\ensuremath{\Lambda}}_{b}$ have the same attracting role as the $\ensuremath{\Lambda}$ hyperon does in lighter hypernuclei. ${\ensuremath{\Xi}}^{\ensuremath{-}}$ and ${\ensuremath{\Xi}}_{c}^{0}$ hyperons have the attracting role only for the proton distribution and have a repulsive role for the neutron distribution. On the contrary, ${\ensuremath{\Xi}}^{0}$ and ${\ensuremath{\Xi}}_{c}^{+}$ hyperons attract surrounding neutrons and reveal a repulsive force to the protons. We find that the different effects of different baryon impurities on the nuclear core are due to the different third components of their isospin.