Behavior of theΛ(1405)resonance in nuclear matter

Strong interaction effects in kaonic atoms are heavily influenced by the properties of the subthreshold $\Lambda \mathrm{}\left(1405\right)\mathrm{}$ resonance, which are here shown to be sizably modified by dynamic effects in nuclear matter. The present approach provides a simple view of an effect which is implicitly present in calculations which couple $KN$ and $\Sigma \pi$ channels and incorporate a pion optical potential.