Meson spectroscopy and properties using Dyson-Schwinger equations
  We study pseudoscalar and scalar mesons using a practical and symmetry preserving truncation of QCD's Dyson-Schwinger equations. We investigate and compare properties of ground and radially excited meson states. In addition to exact results for radial meson excitations we also present results for meson masses and decay constants from the chiral limit up to the charm-quark mass, e. g., the mass of the chi_{c0} (2P) meson. 
A. Krassnigg, C. D. Roberts, S. V. Wright