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OKC/Nordita High-Energy Physics Theory seminar

Exact Four-Point Functions: Genus Expansion, Matrix Model, and Strong Coupling (Unusual Room)

by Till Bargheer (Leibniz Universität Hannover & DESY)

Europe/Stockholm
122:026 (Nordita West) ()

122:026 (Nordita West)

Description
Using integrability, correlation functions of local operators in planar N=4 super Yang-Mills theory can be computed by reconstructing the dual worldsheet from a set of "hexagon" patches via "gluing" (performing complete state sums over mirror Bethe states). After reviewing this general procedure, I will explain how it can be used to compute a certain class of four-point correlators as an exact function of the coupling at any order in the 1/Nc genus expansion, and how the resulting series in some cases can be re-summed via a suitable matrix model to recover the full Nc dependence. If time permits, I will also comment on the strong-coupling limit of these correlators.