In-medium antikaon and eta-meson interactions and bound states
  The role played by subthreshold meson-baryon dynamics is demonstrated in kaonic-atom, Kbar-nuclear and eta-nuclear bound-state calculations within in-medium models of Kbar-N and eta-N interactions. New analyses of kaonic atom data reveal appreciable multi-nucleon contributions. Calculations of eta-nuclear bound states show, in particular, that the eta-N scattering length is not a useful indicator of whether or not eta mesons bind in nuclei nor of the widths anticipated for such states. 
Avraham Gal, Eli Friedman, Nir Barnea, Ale\v{s} Ciepl\'y, Ji\v{r}\'i   Mare\v{s}, Daniel Gazda
nucl-th hep-ph nucl-ex