Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1997-06-22
Physics
High Energy Physics
High Energy Physics - Theory
29 pages, LaTeX file. Final version appearing in Duke Mathematical Journal. Only copy-editing changes have been made
Scientific paper
We apply the general theory of tensor products of modules for a vertex operator algebra developed in our papers hep-th/9309076, hep-th/9309159, hep-th/9401119, q-alg/9505018, q-alg/9505019 and q-alg/9505020 to the case of the Wess-Zumino-Novikov-Witten models and related models in conformal field theory. We show that for the category of modules for a vertex operator algebra containing a subalgebra isomorphic to a tensor product of rational vertex operator algebras associated to affine Lie algebras, the intertwining operators among the modules have the associativity property, the category has a natural structure of vertex tensor category, and a number of related results hold. We obtain, as a corollary and special case, a construction of the previously-studied braided tensor category structure on the category of finite direct sums of standard (integrable highest weight) modules of a fixed positive integral level for an affine Lie algebra.
Huang Yi-Zhi
Lepowsky James
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