Meson form factors in the Dyson-Schwinger approach
Pieter Maris
U. of Pittsburgh

The set of Dyson-Schwinger equations form a Poincare' covariant framework within which to study hadrons. In this approach, two-body bound states such as mesons are described by solutions of the Bethe-Salpeter equation. Once the bound state equation is solved the resulting Bethe-Salpeter amplitude can be used to calculate various meson and diquark properties such as their electromagnetic form factors. Electromagnetic current conservation is manifest in these calculations, and the influence of intermediate vector mesons is incorporated self-consistently. The results for the pion form factor are in excellent agreement with experiments; in addition, we will discuss form factors of other states such as diquarks and vector mesons.