BRST operators for W algebras
arXiv:0802.3781 · doi:10.1063/1.2940333
Abstract
The study of quantum Lie algebras motivates a use of non-canonical ghosts and anti-ghosts for non-linear algebras, like W-algebras. This leads, for the W_3 and W_3^(2) algebras, to the BRST operator having the conventional cubic form.
15 pages, revised version, to appear in J. Math. Phys