Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1992-02-02
Phys.Rev.D47:4546-4566,1993
Physics
High Energy Physics
High Energy Physics - Theory
42 pages
Scientific paper
10.1103/PhysRevD.47.4546
The Wess-Zumino-Witten (WZW) theory has a global symmetry denoted by $G_L\otimes G_R$. In the standard gauged WZW theory, vector gauge fields (\ie\ with vector gauge couplings) are in the adjoint representation of the subgroup $H \subset G$. In this paper, we show that, in the conformal limit in two dimensions, there is a gauged WZW theory where the gauge fields are chiral and belong to the subgroups $H_L$ and $H_R$ where $H_L$ and $H_R$ can be different groups. In the special case where $H_L=H_R$, the theory is equivalent to vector gauged WZW theory. For general groups $H_L$ and $H_R$, an examination of the correlation functions (or more precisely, conformal blocks) shows that the chiral gauged WZW theory is equivalent to $(G/H)_L\otimes (G/H)_R$ coset models in conformal field theory. The equivalence of the vector gauged WZW theory and the corresponding $G/H$ coset theory then follows.
Chung Stephen-wei
Henry Tye S.-H.
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