Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2003-01-10
Prog.Part.Nucl.Phys. 50 (2003) 305-315
Physics
Nuclear Physics
Nuclear Theory
Presented at the International School on Nuclear Physics, 24th course: Quarks in Nuclei, Erice, Sicily, September 2002; to be
Scientific paper
10.1016/S0146-6410(03)00024-3
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 rho -> pi pi 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.
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