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VOLUME 58 (1993) | ISSUE 10 | PAGE 785
Critical behavior of 3D electrodynamics
Three-dimensional QED with N four-component fermions is analyzed in the leading and succeeding orders of a \/N expansion, in the approach of Appelquist et ah As the gauge parameter increases, the interval of N values in which a dynamic mass is generated shrinks markedly. In the Landau gauge, for exmple, a dynamic breaking of chiral symmetry occurs at N < 3.31, and in the Feynman gauge a dynamic mass is not generated at all.