Missing mass spectroscopy of η' mesic nuclei with the (p,d) reaction at GSI

We are planning an experimental search for η' mesic nuclei by missing-mass spectroscopy of the ¹²C(p,d)η' * ¹¹C reaction at GSI. In nuclear medium, due to restoration of chiral symmetry, the mass of the η' meson may be reduced, and η' bound states in a nucleus may exist. The experiment will be started at GSI with a 2.5 GeV proton beam using FRS as a spectrometer and will be continued at Super-FRS at FAIR. If the η' meson has a sufficiently large mass reduction and a small decay width at normal nuclear density, peak structures may be observed even in an inclusive spectrum. The first pilot experiment is expected in 2014, and the preparation is presently on-going. A high- refractive-index aerogel Cherenkov detector for the on-line particle identification and a new ion optics for FRS have been developed