Towards a self-consistent solution of the Landau gauge quark-gluon   vertex Dyson-Schwinger equation
  The quark-gluon vertex in Landau gauge QCD is investigated in the Dyson-Schwinger approach. The aim is to obtain a fully self-consistent solution of the quark propagator and the quark-gluon vertex Dyson-Schwinger equation (DSE) in the vacuum using the gluon propagator as input from other calculations. The truncation scheme used in an earlier study is systematically improved and the first decisive step towards a full solution is presented. First results for the quark propagator with a fully dressed quark-gluon vertex in a truncation that incorporates all twelve vertex tensor-structures are shown. 
Andreas Windisch, Markus Hopfer and Reinhard Alkofer
hep-ph hep-th