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

Abstract

The effects of the $\Lambda$(1405) (${\Lambda }^{\ast }$) 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 ${\Lambda }^{\ast }$ 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.

Comments: 4 pages, 3 figures, Talk presented at the 10th International Conference on Hypernuclear and Strange Particle Physics (Hyp-X), Tokai, Japan, Sept. 14-18, 2009. To be published in Nucl. Phys. A