RG flows of integrable σmodels and the twist function
Abstract
In the study of integrable nonlinear σmodels which are assemblies and/or deformations of principal chiral models and/or WZW models, a rational function called the twist function plays a central rôle. For a large class of such models, we show that they are oneloop renormalizable, and that the renormalization group flow equations can be written directly in terms of the twist function in a remarkably simple way. The resulting equation appears to have a universal character when the integrable model is characterized by a twist function.
 Publication:

Journal of High Energy Physics
 Pub Date:
 February 2021
 DOI:
 10.1007/JHEP02(2021)065
 arXiv:
 arXiv:2010.07879
 Bibcode:
 2021JHEP...02..065D
 Keywords:

 Conformal Field Models in String Theory;
 Integrable Field Theories;
 Renormalization Group;
 Sigma Models;
 High Energy Physics  Theory;
 Mathematical Physics;
 Nonlinear Sciences  Exactly Solvable and Integrable Systems
 EPrint:
 v1: 1+47 pages, Latex, v2: JHEP version