Consequences Of Fully Dressing Quark-Gluon Vertex Function With Two-Point Gluon Lines

Abstract

We extend recent studies of the effects of quark-gluon vertex dressing upon the solutions of the Dyson-Schwinger equation for the quark propagator. A momentum delta function is used to represent the dominant infrared strength of the effective gluon propagator so that the resulting integral equations become algebraic. The quark-gluon vertex is constructed from the complete set of diagrams involving only 2-point gluon lines. The additional diagrams, including those with crossed gluon lines, are shown to make an important contribution to the DSE solutions for the quark propagator, because of their large color factors and the rapid growth in their number.

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• Aspects of open-flavour mesons in a comprehensive DSBSE study
• Effects of a dressed quark-gluon vertex in pseudoscalar heavy-light mesons
• First look at heavy-light mesons with a dressed quark-gluon vertex
• Light-quarkonium spectra and orbital-angular-momentum decomposition in a Bethe-Salpeter-equation approach
• Diquark bound states with a completely crossed ladder truncation
• 1/Nc Expansion in QCD: Double-Line Counting Rules and the Undeservingly Discarded U(1) Ghost