Medium effects to the N(1535) resonance and eta mesic nuclei
  The structure of eta-nucleus bound systems (eta mesic nuclei) is investigated as one of the tools to study in-medium properties of the N(1535) (N*) resonance. We show that, as a general consequence, the eta-nucleus potential has a repulsive core at the nuclear center with an attractive part at the nuclear surface, if sufficient reduction of the mass difference of N and N* stems from the in-medium effects to N*. The (d,3He) spectra are evaluated for the formation of these bound states to investigate the experimental feasibility. 
D. Jido (1), H. Nagahiro (2), S. Hirenzaki (2) ((1) RCNP, Osaka Univ.,   (2) Nara women's Univ.)