We present novel lattice results for the form factors of the quenched three-gluon vertex of QCD, in two special kinematic configurations that depend on a single momentum scale. We consider three form factors, two associated with a classical tensor structure and one without tree-level counterpart, exhibiting markedly different infrared behaviors. Specifically, while the former display the typical suppression driven by a negative logarithmic singularity at the origin, the latter saturates at a small negative constant. These exceptional features are analyzed within the Schwinger-Dyson framework, with the aid of special relations obtained from the Slavnov-Taylor identities of the theory. The emerging picture of the underlying dynamics is thoroughly corroborated by the lattice results, both qualitatively as well as quantitatively.
@article{arxiv.2102.04959,
title = {Infrared facets of the three-gluon vertex},
author = {A. C. Aguilar and F. De Soto and M. N. Ferreira and J. Papavassiliou and J. Rodríguez-Quintero},
journal= {arXiv preprint arXiv:2102.04959},
year = {2021}
}