Gauge Symmetry Beyond Perturbation Theory: BRST and anti-BRST Structure, Background Fields, and Infrared Dynamics of Yang--Mills Theory
This paper provides a comprehensive functional framework for non-Abelian gauge theories that utilizes BRST and anti-BRST symmetries within background field gauges to construct a unique, gauge-invariant, and process-independent effective charge for Yang-Mills theory, thereby offering a unified description of its dynamics from the ultraviolet to the infrared regime where dynamical mass generation occurs.