Abstract
The study of light pseudoscalar quark-antiquark bound states in the Dyson-Schwinger approach with the effective QCD coupling enhanced by the interplay of the dimension 2 gluon condensate and dimension 4 gluon condensate , is extended to the complex. We include the effects of the gluon axial anomaly into the Dyson-Schwinger approach to mesons. The calculated masses, mixing and two-photon decay widths of and mesons are in agreement with experiment. Also, in a model-independent way, we give the modification of the Gell-Mann–Okubo and Schwinger nonet relations due to the interplay of the gluon anomaly and SU(3) flavor symmetry breaking.
- Received 2 December 2005
DOI:https://doi.org/10.1103/PhysRevD.73.036002
©2006 American Physical Society