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Article

Dual description of eta-deformed OSP sigma models

Journal of High Energy Physics. 2020. Vol. 2020. No. 12. P. 1-45.
Alfimov M., Feigin B. L., Hoare B., Litvinov A.

We study the dual description of the eta-deformed OSP(N|2m) sigma model in the asymptotically free regime (N > 2m+2). Compared to the case of classical Lie groups, for supergroups there are inequivalent eta-deformations corresponding to different choices of simple roots. For a class of such deformations we propose the system of screening charges depending on a continuous parameter b, which defines the eta-deformed OSP(N|2m) sigma
model in the limit b -> 1 and a certain Toda QFT as b -> 0. In the sigma model regime we show that the leading UV asymptotic of the eta-deformed model coincides with a perturbed Gaussian theory. In the perturbative regime b -> 0 we show that the tree-level two-particle scattering matrix matches the expansion of the trigonometric OSP(N|2m) S-matrix.