The role of final-state interaction in tensor polarization effects of the reaction gamma d rightarrow p n pi ^{0}

Abstract

Tensor analyzing-power components T_{20}, T_{21}, and T_{22} for the reaction gamma drightarrow nppi ^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 drightarrow nppi ^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.