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Messchendorp, J. Junkersfeld, J. Langheinrich, J. Lotz, K. Brinkmann, K. Essig, K. Makonyi, L.M. Pant, M. Fuchs, M. Konrad, M. Nanova, M. Ostrick, M. Pfeiffer, O. Bartholomy, P. Hoffmeister, R. Ewald, R. Gregor, R. Novotny, R. Varma, S. H\\\"offgen, S. Lugert, S. Schadmand, T. Mertens, T. Szczepanek, U. Thoma, V. Crede, V. Metag, V. V. Sumachev, Y.A. Beloglazov","submitted_at":"2012-04-13T08:27:22Z","abstract_excerpt":"The photoproduction of \\eta'-mesons off different nuclei has been measured with the CBELSA/TAPS detector system for incident photon energies between 1500 - 2200 MeV. The transparency ratio has been deduced and compared to theoretical calculations describing the propagation of \\eta'-mesons in nuclei. The comparison indicates a width of the \\eta' -meson of the order of \\Gamma= 15-25 MeV at \\rho =\\rho_0 for an average momentum p_{\\eta'} = 1050 MeV/c, at which the \\eta'-meson is produced in the nuclear rest frame. 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