The three-gluon vertex in Landau gauge

Understand

We present the first Dyson-Schwinger calculation of the three-gluon vertex in Landau-gauge QCD in which its full covariant structure is back-coupled self-consistently.

• We truncate a Bose-symmetrized version of the DSE at the level of one-loop diagrams, model the four-gluon vertex, and neglect terms that contain non-primitively divergent n-point functions; the ghost-gluon vertex is taken bare to good approximation.
• Fit functions for the ghost and gluon propagators that interpolate between scaling and decoupling are presented.
• In all aspects of our study Bose symmetry is manifest, from the truncation to the basis decomposition and to the momentum invariants.