BRST GAUGE-FIXING AND REGULARIZATION

In the presence of consistent regulators, the standard procedure of BR ST gauge fixing (or moving from one gauge to another) can require non- trivial modifications. These modifications occur at the quantum level, and gauges exist which are only well-defined when quantum mechanical modifications are correctly taken into account. We illustrate how this phenomenon manifests itself in the solvable case of two-dimensional b osonization in the path integral formalism. As a by-product, we show h ow to derive smooth bosonization in Batalin-Vilkovisky Lagrangian BRST quantization.