Another Perturbative Expansion in Nonabelian Gauge Theory

We consider a new perturbation scheme in nonabelian gauge theory. Pure Yang-Mills theory in three dimensions is taken as a concrete example. The zerothorder in the perturbative expansion is given by BF theory coupled to a Stückelberglike field. The effective coupling for the expansion can be small in the infrared regime, which implies that nonperturbative treatment of Yang-Mills theory may Perturbation theory has been successful in quantum field theory when the effective coupling is small in the energy region considered: two main examples are provided by electroweak theory in the accessible energy range and quantum chromodynamics (QCD) in the regime of deep inelastic scattering. However, naive