Insights into the quark-gluon vertex from lattice QCD and meson spectroscopy

Abstract

By comparing successful quark-gluon vertex interaction models with the corresponding interaction extracted from lattice-QCD data on the quark's propagator, we identify common qualitative features which could be important to tune future interaction models beyond the rainbow ladder approximation. Clearly, a quantitative comparison is conceptually not simple, but qualitatively the results suggest that a realistic interaction should be relatively broad with a strong support at about $0.4-0.6$~GeV and infrared-finite.

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• Interplay of dynamical and explicit chiral symmetry breaking effects on a quark
• The impact of transverse Slavnov-Taylor identities on dynamical chiral symmetry breaking
• The Podolsky propagator in gap and bound-state equations
• Contemporary continuum QCD approaches to excited hadrons
• The Charm and Beauty of Strong Interactions
• Heavy-meson chiral Lagrangians, effective flavored couplings, SU(4) flavor breaking and their consequences