On the S-matrix of the Sub-leading Magnetic Deformation of the Tricritical Ising Model in Two Dimensions
F. Colomo, A. Koubek, G. Mussardo
Abstract
We compute the S-matrix of the Tricritical Ising Model perturbed by the subleading magnetic operator using Smirnov's RSOS reduction of the Izergin-Korepin model. The massive model contains kink excitations which interpolate between two degenerate asymmetric vacua. As a consequence of the different structure of the two vacua, the crossing symmetry is implemented in a non-trivial way. We use finite-size techniques to compare our results with the numerical data obtained by the Truncated Conformal Space Approach and find good agreement.
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