Photoproduction of $\eta^{'}$ Mesons from Nuclei
  The photoproduction of $\eta^{'}$-mesons from different nuclei has been measured using the Crystal Barrel(CB)/TAPS detector system at the ELSA accelerator facility in Bonn. Recent results on the in-medium properties of the $\eta^{'}$-meson, derived from the transparency ratio measurements, are presented. The absorption of the $\eta^{'}$-meson in nuclear matter is compared to the properties of the other mesons ($\eta$ and $\omega$). 
Mariana Nanova (for the CBELSA/TAPS Collaboration)
nucl-ex