The role of final-state interaction in tensor polarization effects of the reaction dpn0

Tensor analyzing-power components T20, T21, and T22 for the reaction gamma d -> np pi 0 have been studied for the first time in the photon energy range from 280 to 500 MeV. The data are extracted from the experimental statistics accumulated at the VEPP-3 storage ring in 2002-2003. The measured asymmetries are compared with the results of statistical simulations performed with the gamma d -> np pi 0 amplitude from a spectator model, taking into account corrections for the final-state interaction. The comparison demonstrates quite good agreement between the experimental results and the theory.