Journal
NUCLEAR PHYSICS B
Volume 843, Issue 1, Pages 344-361Publisher
ELSEVIER
DOI: 10.1016/j.nuclphysb.2010.09.006
Keywords
String theory; T-duality; High spin limits
Categories
Funding
- TH-Division at CERN
- NSF
- Division Of Physics
- Direct For Mathematical & Physical Scien [0855515] Funding Source: National Science Foundation
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The action of the non-abelian T-dual of the WZW model is related to an appropriate gauged WZW action via a limiting procedure. We extend this type of equivalence to other sigma-models with non-abelian isometrics and their non-abelian T-duals, focusing on Principal Chiral models. We reinforce and refine this equivalence by arguing that the non-abelian T-duals are the effective backgrounds describing states of an appropriate parent theory corresponding to divergently large highest weight representations. The proof involves carrying out a subtle limiting procedure in the group representations and relating them to appropriate limits in the corresponding backgrounds. We illustrate the general method by providing several non-trivial examples. (C) 2010 Elsevier B.V. All rights reserved.
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