A Derivation of the BRST Operator for Non-Critical W-Strings

Abstract

We derive the recently proposed BRST charge for non-critical W strings from a Lagragian approach. The basic observation is that, despite appearances, the combination of two classical ``matter'' and ``Toda'' w_3 systems leads to a closed modified gauge algebra, which is of the so-called soft type. Based on these observations, a novel way to construct critical W_3 strings is given.

TEX file, pp14, UG-8/92, CERN-TH.6647/92,LBL-32806

References in corpus (2)

• The $W_3$-string spectrum
• New Realisations of W Algebras and W Strings

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