eta and eta' mesons and dimension 2 gluon condensate <A^2>
High Energy Physics - Phenomenology
2007-05-23 v1 Nuclear Theory
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 <A^2> and dimension 4 gluon condensate <F^2>, is extended to the eta-eta' 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 eta and eta' 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.
Keywords
Cite
@article{arxiv.hep-ph/0512064,
title = {eta and eta' mesons and dimension 2 gluon condensate <A^2>},
author = {D. Kekez and D. Klabucar},
journal= {arXiv preprint arXiv:hep-ph/0512064},
year = {2007}
}
Comments
15 pages, 2 tables, 1 eps figure, revtex4