Describing $a_1$ and $b_1$ decays

Two-body pion-radiating and weak decays of light axial-vector mesons and the $\rho$ are studied as an application of the Dyson-Schwinger equations. Models based on the rainbow-ladder truncation are capable of providing a good description, and yield the correct sign and magnitude of the $a_1\to \rho \pi$ and $b_1\to \omega \pi D/S$ ratios, with no additional mechanism necessary.