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arXiv 2007.15049hep-thmath-phmath.MPnlin.SI
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$χ$ CFT $_4$中精确可解的单迹四点关联函数

Exactly solvable single-trace four point correlators in $χ$CFT$_4$

Sergey Derkachov, Enrico Olivucci

摘要:

本文研究了手征共形场论($χ$ CFT $_4$)中作为$γ$变形$\mathcal{N}=4$ SYM理论的双标度极限而产生的一类广泛的平面单迹四点关联函数。在平面(t 'Hooft)极限中,每个这样的关联函数由单个费曼积分描述,该费曼积分具有正方形晶格“渔网”和/或汤川顶点的蜂窝晶格的体拓扑。利用具有$SO(1,5)$对称性的可精确求解的自旋链磁体实现了任意环上这类Feynmann积分的计算。在本文中,我们详细解释了我们最近的信中提出的磁铁模型的解决方案,我们得到了一个通用的公式表示的Feynman积分的频谱上的分离变量的磁铁,为任何数量的标量和费米子场在相应的相关。仅对于标量场的特殊选择,我们的公式再现了B. Basso和L.狄克逊的渔网积分。

英文摘要:

In this paper we study a wide class of planar single-trace four point correlators in the chiral conformal field theory ($χ$CFT$_4$) arising as a double scaling limit of the $γ$-deformed $\mathcal{N}=4$ SYM theory. In the planar (t'Hooft) limit, each of such correlators is described by a single Feynman integral having the bulk topology of a square lattice "fishnet" and/or of an honeycomb lattice of Yukawa vertices. The computation of this class of Feynmann integrals at any loop is achieved by means of an exactly-solvable spin chain magnet with $SO(1,5)$ symmetry. In this paper we explain in detail the solution of the magnet model as presented in our recent letter and we obtain a general formula for the representation of the Feynman integrals over the spectrum of the separated variables of the magnet, for any number of scalar and fermionic fields in the corresponding correlator. For the particular choice of scalar fields only, our formula reproduces the conjecture of B. Basso and L. Dixon for the fishnet integrals.

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