Covariant QCD modeling of light meson physics
Abstract
We summarize recent progress in soft QCD modeling based on the set of Dyson-Schwinger equations truncated to ladder-rainbow level. This covariant approach to hadron physics accommodates quark confinement and implements the QCD one-loop renormalization group behavior. We compare the dressed quark propagator, pseudoscalar and vector meson masses as a function of quark mass, and the ϱ → ππ coupling to recent lattice-QCD data. The error in the Gell-Mann-Oakes-Renner relation with increasing quark mass is quantified by comparison to the exact pseudoscalar mass relation as evaluated within the ladder-rainbow Dyson-Schwinger model.
- Publication:
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Progress in Particle and Nuclear Physics
- Pub Date:
- 2003
- DOI:
- 10.1016/S0146-6410(03)00024-3
- arXiv:
- arXiv:nucl-th/0301040
- Bibcode:
- 2003PrPNP..50..305T
- Keywords:
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- Nuclear Theory;
- High Energy Physics - Phenomenology
- E-Print:
- Presented at the International School on Nuclear Physics, 24th course: Quarks in Nuclei, Erice, Sicily, September 2002