Towards the finite-size spectrum of the mixed-flux AdS3 x S3 x T4 superstring
The scattering matrix of an integrable model determines its finite-size spectrum. In this talk some properties of the mixed-flux AdS3 x S3 x T4 superstring are reviewed, and the exact S-matrix for its world-sheet excitations is proposed. The proposal passes several checks, including comparison with perturbative and semiclassical computations from the string sigma model. The S-matrix is used to conjecture the mirror Thermodynamic Bethe Ansatz equations which encode the finite-size spectrum of the superstring.