NONTRIVIAL INFRARED STRUCTURE IN (2-DIMENSIONAL QUANTUM ELECTRODYNAMICS(1))

We show that the gauge-fermion interaction in multiflavor (2 + 1)-dime nsional quantum electrodynamics with a finite infrared cutoff is respo nsible for non-Fermi-liquid behavior in the infrared, in the sense of leading to the existence of a nontrivial fixed point at zero momentum, as well as to a significant slowing down of the running of the coupli ng at intermediate scales as compared with previous analyses on the su bject. Both these Features constitute deviations from Fermi-liquid the ory. Our discussion is based on the leading-1/N resummed solution for the wave-function renormalization of the Schwinger-Dyson equations. Th e present work completes and confirms the expectations of an earlier w ork by two of the authors (I.J.R.A. and N.E.M.) on the nontrivial infr ared structure of the theory.