Spectroscopy of eta' mesic nuclei with (p,d) reaction
  We are going to perform an inclusive spectroscopy experiment of eta' mesic nuclei with the 12C(p,d) reaction to study in-medium properties of the eta' meson. In nuclear medium, the eta' meson mass may be reduced due to partial restoration of chiral symmetry. In case of sufficiently large mass reduction and small absorption width of eta' at normal nuclear density, peak structures of eta' mesic states in 11C will be observed near the eta' emission threshold even in an inclusive spectrum. The experiment will be carried out at GSI with proton beam supplied by SIS using FRS as a spectrometer. The detail of the experiment is described. 
Yoshiki K. Tanaka, Stefan Friedrich, Hiroyuki Fujioka, Hans Geissel,   Ryugo S. Hayano, Satoru Hirenzaki, Kenta Itahashi, Sa...
nucl-ex