a0(980) photoproduction in the coupled channel model

We calculated the coupled channel photoproduction amplitudes of the scalar isovector resononace a 0 (980), which include the πη , K + K − and K 0 K 0 intermediate states. Based on them we obtained the mass distribution in the πη channel at photon energy Eγ =7 GeV, corresponding to energy accissible in new JLab experiments CLAS12 and GlueX. We also analyzed the shape of mass distribution as a function of the phase of the background amplitude.