Holographic correlation functions of hexagon Wilson loops with one local operator

TL;DR

This paper computes the leading-order holographic correlation function of a hexagon Wilson loop with a local operator in the strong-coupling regime, revealing dependence on conformal cross-ratios and extending understanding beyond scattering amplitude interpretations.

Contribution

It introduces a new class of minimal surface solutions for hexagon Wilson loops and calculates their correlation with a local operator at strong coupling.

Findings

Correlation function expressed in terms of three conformal ratios.

Leading-order semiclassical approximation results obtained.

Analysis includes regular and boosted irregular hexagon configurations.

Abstract

We consider the ratio of the correlation function of an hexagon light-like Wilson loop with one local operator over the expectation value of the Wilson loop within the strong-coupling regime of the AdS/CFT correspondence. We choose the hexagon Wilson loop within a class of minimal solutions obtained by cutting and gluing light-like quadrangle loops. These surfaces do not have an interpretation in terms of dual scattering amplitudes but they still exhibit general features of the mixed correlation function. In the case of a regular null hexagon conformal symmetry constrains the space-time dependence of the correlator up to a function of three conformal cross-ratios. We obtain the leading-order contribution to the correlation function in the semiclassical approximation of large string tension, and express the result in terms of three conformal ratios in the case where the local operator is taken to be the dilaton. We include the analysis of an irregular Wilson loop obtained after a boost of the regular hexagon.