Effects of the $\mathrm{\Lambda }$(1405) on the Structure of Multi-Antikaonic Nuclei

The effects of the $\mathrm{\Lambda }$(1405) (${\mathrm{\Lambda }}^{\ast }$) on the structure of the multi-antikaonic nucleus (MKN), in which several $K^{-}$ mesons are embedded to form deeply bound states, are considered based on chiral symmetry combined with a relativistic mean-field theory. It is shown that additional attraction resulting from the ${\mathrm{\Lambda }}^{\ast }$ pole has a sizable contribution to not only the density profiles for the nucleons and $K^{-}$ mesons but also the ground state energy of the $K^{-}$ mesons and binding energy of the MKN as the number of the embedded $K^{-}$ mesons increases.