%0 Journal Article
%A Llanes Estrada, Felipe José
%A Fischer, CS
%A Alkofer, R
%T Semiperturbative construction for the quark-gluon vertex
%D 2006
%@ 0920-5632
%U https://hdl.handle.net/20.500.14352/50839
%X We construct a model for the quark-gluon vertex of Landau gauge QCD. This is of twofold interest: on the one hand the quark-gluon interaction is at the heart of quark confinement, on the other hand it is a central element in hadron phenomenology based on QCD Greens functions. We employ the non-Abelian one-loop diagram in perturbation theory, which is of order N-c. As a novelty we replace the tree-level quark and gluon propagators in this diagram by their dressed counterparts solving the Dyson-Schwinger equations. The N.-suppressed Abelian diagram is an order of magnitude smaller in various kinematics. We also study the effect of ghost dressing factors on the vertex obtaining a construction in good agreement with recent low-momentum lattice calculations.
%~