Abstract
The BRST symmetry for the free bosonic string in the Beltrami parametrization is gauged via a Noether procedure. The resulting local BRST symmetry is characterized by a (localized) differential algebra which is shown to be isomorphic to the (global) BRST algebra one starts from. The corresponding locally invariant gauge-fixed action which exhibits the factorization property is constructed, and a form for the (perturbative BRST current-algebra) anomaly, associated with the localized differential algebra is given. The equivalence between the Noether localization procedure presented here and a procedure which mimics the direct “geometrical” gauging of the BRST symmetry for the Yang-Mills theory is shown.
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