@Article{Aguilar_etal2023,
author="Aguilar, A. C.
and Ferreira, M. N.
and Iba{\~{n}}ez, D.
and Papavassiliou, J.",
title="Schwinger displacement of the quark-gluon vertex",
journal="European Physical Journal C",
year="2023",
volume="83",
number="10",
pages="967 - 22pp",
abstract="The action of the Schwinger mechanism in pure Yang-Mills theories endows gluons with an effective mass, and, at the same time, induces a measurable displacement to the Ward identity satisfied by the three-gluon vertex. In the present work we turn to Quantum Chromodynamics with two light quark flavors, and explore the appearance of this characteristic displacement at the level of the quark-gluon vertex. When the Schwinger mechanism is activated, this vertex acquires massless poles, whose momentum-dependent residues are determined by a set of coupled integral equations. The main effect of these residues is to displace the Ward identity obeyed by the pole-free part of the vertex, causing modifications to its form factors, and especially the one associated with the tree-level tensor. The comparison between the available lattice data for this form factor and the Ward identity prediction reveals a marked deviation, which is completely compatible with the theoretical expectation for the attendant residue. This analysis corroborates further the self-consistency of this mass-generating scenario in the general context of real-world strong interactions.",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=6080), last updated on Fri, 26 Apr 2024 13:49:18 +0000",
doi="10.1140/epjc/s10052-023-12103-8",
opturl="https://arxiv.org/abs/2308.16297",
opturl="https://doi.org/10.1140/epjc/s10052-023-12103-8"
}