Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Canonical BRST Quantisation of Worldsheet Gravities   We reformulate the BRST quantisation of chiral Virasoro and $W_3$ worldsheet
gravities. Our approach follows directly the classic BRST formulation of
Yang-Mills theory in employing a derivative gauge condition instead of the
conventional conformal gauge condition, supplemented by an introduction of
momenta in order to put the ghost action back into first-order form. The
consequence of these simple changes is a considerable simplification of the
BRST formulation, the evaluation of anomalies and the expression of Wess-Zumino
consistency conditions. In particular, the transformation rules of all fields
now constitute a canonical transformation generated by the BRST operator $Q$,
and we obtain in this reformulation a new result that the anomaly in the BRST
Ward identity is obtained by application of the anomalous operator $Q^2$,
calculated using operator products, to the gauge fermion.

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The categories of this paper are: eess
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The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph
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The categories of this paper are: nlin
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The categories of this paper are: astro-ph
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The categories of this paper are: physics
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The categories of this paper are: plasm-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: cs
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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg