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 zeroth-order in the perturbative expansion is given by BF theory coupled to a Stuckelberg-like field. The effective coupling for the ex pansion can be small in the infrared regime, which implies that nonper turbative treatment of Yang-Mills theory may be partially reduced to t hat of BF theory.