Calculations of kaonic nuclei based on chiral meson-baryon amplitudes

In-medium K¯N scattering amplitudes developed within a chirally motivated coupled-channel model are used to construct K− nuclear potentials for calculations of K− nuclear quasi-bound states. Self-consistent evaluations yield K− potential depths −ReVK(ρ0) of order 100 MeV. Dynamical polarization effects and two-nucleon K¯NN→YN absorption modes are discussed. The widths ΓK of allK− nuclear quasi-bound states are comparable or even larger than the corresponding binding energies BK, exceeding considerably the energy level spacing.