Calculations of kaonic nuclei based on chiral meson-baryon coupled-channel interaction models

Abstract

We report on our recent self-consistent calculations of K − -nuclear quasi-bound states using a K − single-nucleon optical potential derived from 6 different chiral meson-baryon coupled-channel interaction models. They yield quite diverse K − 1s binding energies and rather small K − decay widths. Next, we supplement the K − single-nucleon potential by a phenomenological K − multinucleon potential introduced recently to achieve good fits to kaonic atom data [1]. We demonstrate a decisive impact of the K − multinucleon interactions on the widths of K − -nuclear states. The resulting widths are considerably larger than the corresponding binding energies. The only two models accepted by the analysis of Ref.[1] even do not yield any kaonic nuclear bound state in many-body nuclear systems with mass number A ≤ 40.