Abstract
We write the thermodynamic Bethe ansatz for the massive OSp(2|2) Gross Neveu and sigma models. We find evidence that the GN S matrix proposed by Bassi and Leclair [12] is the correct one. We determine features of the sigma model S matrix, which seem highly unconventional; we conjecture in particular a relation between this sigma model and the complex sine-Gordon model at a particular value of the coupling. We uncover an intriguing duality between the OSp(2|2) GN (resp. sigma) model on the one hand, and the SO(4) sigma (resp. GN model) on the other, somewhat generalizing to the massive case recent results on OSp(4|2). Finally, we write the TBA for the (SUSY version of the) flow into the random bond Ising model proposed by Cabra et al. [43], and conclude that their S matrix cannot be correct.
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Saleur, H., Pozsgay, B. Scattering and duality in the 2 dimensional OSp(2|2) gross neveu and sigma models. J. High Energ. Phys. 2010, 8 (2010). https://doi.org/10.1007/JHEP02(2010)008
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DOI: https://doi.org/10.1007/JHEP02(2010)008