On Symmetries of Some Massless 2D Field Theories

Abstract

We describe few aspects of the quantum symmetries of some massless two-dimensional field theories. We discuss their relations with recent proposals for the factorized scattering theories of the massless $PC{M}_1$ and $O(3{)}_{\theta =\pi }$ sigma models. We use these symmetries to propose massless factorized S-matrices for the $su(2)$ sigma models with topological terms at any level, alias the $PC{M}_k$ models, and for the $su(2)$-coset massless flows.

arXiv comment13 pages

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