η and ${\eta }^{\prime }$ in a coupled Schwinger-Dyson and Bethe-Salpeter approach. II. The ${\gamma }^{*}\gamma$ transition form factors

The applications of the consistently coupled Schwinger-Dyson and Bethe-Salpeter approach to the $\eta -{\eta }^{\prime }$ complex are extended to the two-photon transition form factors of η and ${\eta }^{\prime }$ for spacelike transferred momenta. We compare our predictions with experiment and some other theoretical approaches.