Speaker
Description
We present a new version of the $\eta$MAID model for $\eta$ and $\eta'$
photoproduction on proton and neutron.
The model includes 23 nucleon resonances parameterized with Breit-Wigner shapes.
The background is described by vector and axial-vector meson exchanges in the
$t$ channel using the Regge cut phenomenology.
Parameters of the resonances were obtained from a fit to the new experimental data of the A2
Collaboration and available data from CBELSA/TAPS, CLAS, and GRAAL Collaborations.
%for $\eta$ and $\eta'$ photoproduction on protons and neutrons.
Dominant role of $1/2^-$ resonances is discussed.
The total cross section for $\eta$ photoproduction demonstrates a cusp at the energy
W$\sim$1.9~GeV.
The cusp is explained as a threshold effect due to the opening $\eta' p$ decay channel
of the $N(1895)1/2^-$ resonance.
