Another look at the Landau gauge three-gluon vertex

TL;DR

This study uses large-volume lattice QCD simulations to analyze the Landau gauge three-gluon vertex, focusing on low-energy behavior and lattice artefacts, providing insights into infrared ghost dominance.

Contribution

It offers a detailed lattice QCD analysis of the three-gluon vertex with large volumes and statistical ensembles, emphasizing low-energy behavior and artefact evaluation.

Findings

Insights into the low-energy behavior of the three-gluon vertex.

Assessment of lattice artefacts in the vertex computation.

Discussion on the infrared ghost dominance evidence.

Abstract

We revisit the computation of the three-gluon vertex in the Landau gauge using lattice QCD simulations with large physical volumes of $\sim$ (6.5 fm)$^ 4$ and $\sim$ (8 fm)$^ 4$ and large statistical ensembles. For the kinematical configuration analysed, that is described by a unique form factor, an evaluation of the lattice artefacts is also performed. Particular attention is given to the low energy behaviour of vertex and its connection with evidence (or lack of it) of infrared ghost dominance.