O{cyrillic} f{cyrillic}o{cyrillic}t{cyrillic}o{cyrillic}-r{cyrillic}o{cyrillic}zh{cyrillic}d{cyrillic}ye{cyrillic}n{cyrillic}i{cyrillic}i{cyrillic} η′-m{cyrillic}ye{cyrillic}e{cyrillic}o{cyrillic}n{cyrillic}a{cyrillic}

Using dispersion-theoretic techniques, calculation of the differential cross-section for the η′ (X0) photoproduction is dealt with and presented. In the straight-channel, contribution from the resonance NN (1688 MeV) and in the exchange channel that from vector meson ρ (756 MeV) have been included. Mixing between η and η′ is used in order to estimate the coupling of the N*Nη′ vertex. © 1969 Società Italiana di Fisica.