Integrable double deformation of the principal chiral model

TL;DR

This paper introduces a new two-parameter family of integrable deformations of the principal chiral model, unifying known models like the Yang-Baxter sigma-model and Wess-Zumino model as special cases.

Contribution

It defines a novel two-parameter integrable deformation framework for the principal chiral model applicable to any compact group.

Findings

Unified description of Yang-Baxter and Wess-Zumino models as limits

New integrable models with two deformation parameters

Potential applications in integrable quantum field theories

Abstract

We define a two-parameter family of integrable deformations of the principal chiral model on an arbitrary compact group. The Yang-Baxter sigma-model and the principal chiral model with a Wess-Zumino term both correspond to limits in which one of the two parameters vanishes.