Charming quasi-exotic open-flavor mesons
  We discuss charmed mesons in the covariant Dyson-Schwinger-Bethe-Salpeter-equation approach. In particular we computed masses, leptonic decay constants, and an orbital-angular-momentum decomposition for a basic set of states. We also report an efficient way to treat the two coupled quark propagator dressing functions via a single function. 
Thomas Hilger, Andreas Krassnigg
hep-ph nucl-th