Curing Fermion Mass Gauge Variance in QED${}_{2+1}$

Abstract

The problem of the gauge dependence of the fermion mass in the Maxwell-Chern-Simons QED${}_{2+1}$ is revisited. Using Proca mass term as an intermediate infrared regulator we are demonstrating gauge-invariance of the fermion mass shell in QED${}_{2+1}$ in all orders of the perturbation theory.

Comments: 6 pages, to appear in Phys. Lett. B