Modeling Nonperturbative QCD for Mesons and Couplings

Abstract

We discuss aspects of a covariant QCD modeling of meson physics by illustrating applications to several coupling constants and form factors. In particular, we cover the $\rho\pi\pi$ and $\pi^0 \gamma \gamma$ interactions, the $\rho$ contribution to the pion charge radius, and $\pi NN$ coupling.