Gauge Sector Dynamics in QCD

TL;DR

This paper reviews recent advances in understanding the nonperturbative gauge sector of QCD, focusing on phenomena like gluon mass generation, coupling stabilization, and vertex suppression, using continuum Schwinger methods and lattice results.

Contribution

It provides a comprehensive overview of recent progress in analyzing QCD's gauge sector through Schwinger function methods and lattice simulations, highlighting key nonperturbative phenomena.

Findings

Gluon mass generation via Schwinger mechanism

Infrared suppression of the three-gluon vertex

Stabilization of the gauge coupling in the infrared

Abstract

The dynamics of the gauge sector of QCD give rise to nonperturbative phenomena that are crucial for the internal consistency of the theory; most notably, they account for the generation of a gluon mass through the action of the Schwinger mechanism, the taming of the Landau pole and the ensuing stabilization of the gauge coupling, and the infrared suppression of the three-gluon vertex. In the present work, we review some key advances in the ongoing investigation of this sector within the framework of the continuum Schwinger function methods, supplemented by results obtained from lattice simulations.