K-MESIC NUCLEI VERSUS η-MESIC NUCLEI

The nuclear states of (K) over bar and eta are bound by a similar mechanism - the excitations of nucleons to Lambda(1405) and N* (1535) resonant states. The observed large differences in binding energies are understood in terms of separation of the involved energies and the resonance positions. The other experimental findings: broad (K) over bar -mesic and narrow eta-mesic states are more difficult to understand. A phenomenological model for eta-N interactions is used to explain the suppression of the eta absorption in light nuclei.