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

OKC/Nordita High-Energy Physics Theory seminar

Monday 02 December 2019
from 13:15
to 14:00 at
122:026 (Nordita West)

Speaker :

Till Bargheer (Leibniz Universität Hannover & DESY)

Abstract :

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.