Hadron-nucleus bound-state spectroscopy

To investigate the behavior of hadrons in nuclear media we are developing new type of nuclear spectroscopy for hadron-nucleus bound states. The domain of deeply bound pionic states is well matured, and new precision experiments on the 1s pi(-) states in Pb-205 and in Sn isotopes have indicated an evidence for partial restoration of chiral symmetry in a well-defined nuclear medium. In the (K) over bar sector we have predicted possible existence of deeply bound (K) over bar states in few-body systems, which are characterized by dense nuclear sytems formed due to the strong attraction of the I = 0 (K) over barN interaction.