Photoproduction of light eta nuclei

The hypothetical existence of eta nuclei, including superlight ones (A = 3), is discussed in the light of the new data and the nuclear model with an optical potential. The quasifree photoproduction of eta mesons on light nuclei is used as the basis for constructing a systematic model of eta -nucleus photoproduction in reactions m u+A->N+ etaAʹ. The dependence of the cross sections for such reactions on the main proposed properties of eta nuclei is discussed. along with the final-state interaction for incident mu energies in the range from threshold to 1 GeV.