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arXiv 1812.04593hep-th
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半BPS威尔逊圈上的关联函数:扰动和扰动

Correlation Functions on the Half-BPS Wilson Loop: Perturbation and Hexagonalization

Naoki Kiryu, Shota Komatsu

摘要:

本文计算了弱耦合下${\cal N}$ = 4超Yang-Mills理论中$1/2$-BPS威尔逊圈上被保护基色的关联函数。我们首先在平面极限中的一个环上进行直接微扰计算,并给出一般两点、三点和四点函数的显式公式。两点和三点函数以及特殊运动学中的四点函数的结果与arXiv:1802.05201中进行的定位计算完全一致。然后,我们分析的结果,鉴于可积性为基础的方法称为“六边形”,这是以前介绍的关联函数的情况下,威尔逊圈的研究。在这种方法中,将相关器分解为称为“六边形”的基本构建块,并通过对中间状态求和将它们重新粘在一起。通过比较,我们推测威尔逊圈上的关联函数可以通过收缩具有边界态的六边形来计算,其中每个边界态代表威尔逊圈的一段。作为一个副产品,我们预测的大电荷渐近的结构常数的威尔逊圈。在此过程中,我们完善了最初在arXiv:1706.02989中提出的基于可积性的方法对威尔逊圈上的一般非BPS结构常数的猜想。

英文摘要:

We compute correlation functions of protected primaries on the $1/2$-BPS Wilson loop in ${\cal N}$ = 4 super Yang-Mills theory at weak coupling. We first perform direct perturbative computation at one loop in the planar limit and present explicit formulae for general two-, three- and four-point functions. The results for two- and three-point functions as well as four-point functions in special kinematics are in perfect agreement with the localization computation performed in arXiv:1802.05201. We then analyze the results in view of the integrability-based approach called "hexagonalization", which was introduced previously to study the correlation functions in the absence of the Wilson loop. In this approach, one decomposes the correlator into fundamental building blocks called "hexagons", and glues them back together by summing over the intermediate states. Through the comparison, we conjecture that the correlation functions on the Wilson loop can be computed by contracting hexagons with boundary states, where each boundary state represents a segment of the Wilson loop. As a byproduct, we make predictions for the large-charge asymptotics of the structure constants on the Wilson loop. Along the way, we refine the conjecture for the integrability-based approach to the general non-BPS structure constants on the Wilson loop, proposed originally in arXiv:1706.02989.

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