Speaker
Alexey Litvinov
(Skoltech)
Description
We study the two-particle approximation of the Ising Field Theory (IFT), formulated in terms of the Bethe–Salpeter (BS) equation. Motivated by the striking structural similarity between BS equation in IFT and the 't Hooft equation in two-dimensional QCD, we develop a new non-perturbative analytical framework inspired by the method of Fateev, Lukyanov, and Zamolodchikov (FLZ). Within this approach, we compute spectral sums and systematically derive the large-n WKB expansion for the Bethe–Salpeter equation, which governs the spectrum of an infinite tower of mesons.
Author
Alexey Litvinov
(Skoltech)
