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arXiv · 1404.3748

The all-loop non-Abelian Thirring model and its RG flow

Georgios Itsios·Konstadinos Sfetsos·Konstadinos Siampos
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Abstract

We analyze the renormalization group flow in a recently constructed class of integrable sigma-models which interpolate between WZW current algebra models and the non-Abelian T-duals of PCM for a simple group G. They are characterized by the integer level k of the current algebra, a deformation parameter lambda and they exhibit a remarkable invariance involving the inversion of lambda. We compute the beta-function for lambda to leading order in 1/k. Based on agreement with previous results for the exact beta-function of the non-Abelian bosonized Thirring model and matching global symmetries, we state that our integrable models are the resummed version (capturing all counterterms in perturbation theory) of the non-Abelian bosonized Thirring model for a simple group G. Finally, we present an analogous treatment in a simple example of a closely related class of models interpolating between gauged WZW coset CFTs and the non-Abelian T-duals of PCM for the coset G/H.

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Georgios Itsios, Konstadinos Sfetsos, Konstadinos Siampos. 2014-05-06. The all-loop non-Abelian Thirring model and its RG flow. https://doi.org/10.1016/j.physletb.2014.04.061

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