VIRTUAL PHOTON EFFECTS IN D=3 BORN-INFELD THEORY

One-loop effects due to virtual gauge field propagation in 2 + 1-dimen sional Born-Infeld theory are investigated. Although this field theory model is not power counting renormalizable, it can be consistently in terpreted as an effective field theory. We derive the one-loop effecti ve action in this framework. Halpern's field strength's formulation is then applied to derive an effective description for the interaction b etween magnetically charged particles, when the gauge field dynamics i s determined by a Born-Infeld action. We compare the results with thos e of the Maxwell theory. (C) 1998 Elsevier Science B.V.