Integrable sigma models and 2-loop RG flow

@article{Hoare2019IntegrableSM,
  title={Integrable sigma models and 2-loop RG flow},
  author={Ben Hoare and Nat Levine and Arkady A. Tseytlin},
  journal={Journal of High Energy Physics},
  year={2019}
}
Abstract Following arXiv:1907.04737, we continue our investigation of the relation between the renormalizability (with finitely many couplings) and integrability in 2d σ- models. We focus on the “λ-model,” an integrable model associated to a group or symmetric space and containing as special limits a (gauged) WZW model and an “interpolating model” for non-abelian duality. The parameters are the WZ level k and the coupling λ, and the fields are g, valued in a group G, and a 2d vector A± in… 
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