SEARCH FOR eta' (958)-NUCLEUS BOUND STATES BY (p, d) REACTION AT GSI AND FAIR

The mass of the eta' mesonis theoretically expected to be reduced at finite density, which indicates the existence of eta'-nucleus bound states. To investigate these states, we perform missing-mass spectroscopy for the (p, d) reaction near the eta' production threshold. The overview of the experimental situation is given and the current status is discussed.