Fehér, L., O'Raifeartaigh, L., Ruelle, P., Tsutsui, I. and Wipf, A. (1991) On Hamiltonian Reductions of the WessZuminoNovikovWitten Theories. (Preprint)
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Abstract
The structure of Hamiltonian symmetry reductions of the WessZuminoNovikovWitten (WZNW) theories by first class KacMoody (KM) constraints is analyzed in detail. Lie algebraic conditions are given for ensuring the presence of exact integrability, conformal invariance and Wsymmetry in the reduced theories. A Lagrangean, gauged WZNW implementation of the reduction is established in the general case and thereby the path integral as well as the BRST formalism are set up for studying the quantum version of the reduction. The general results are applied to a number of examples. In particular, a Walgebra is associated to each embedding of sl(2) into the simple Lie algebras by using purely first class constraints. The primary fields of these Walgebras are manifestly given by the sl(2) embeddings, but it is also shown that there is an sl(2) embedding present in every polynomial and primary KM reduction and that the W^l_nalgebras have a hidden sl(2) structure too. New generalized Toda theories are found whose chiral algebras are the Walgebras based on the halfintegral sl(2) embeddings, and the Wsymmetry of the effective action of those generalized Toda theories associated with the integral gradings is exhibited explicitly.
Item Type:  Article 

Divisions:  School of Theoretical Physics > Preprints 
Date Deposited:  19 Jun 2018 14:14 
Last Modified:  24 Jun 2024 00:35 
URI:  https://dair.dias.ie/id/eprint/754 
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