Quark-Antiquark Bound States within a Dyson-Schwinger Bethe-Salpeter Formalism

Pion and kaon observables are calculated using a Dyson-Schwinger Bethe-Salpeter formalism. It is shown that an infrared finite gluon propagator can lead to quark confinement via generation of complex mass poles in quark propagators. Observables, including electromagnetic form factors, are calculated entirely in Euclidean metric for spacelike values of bound state momentum and final results are extrapolated to the physical region.
Comment: Minor typographical corrections. Accepted for publication in Nucl. Phys. A