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arXiv 1702.03283hep-th
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S-矩阵奇异性与CFT关联函数

S-matrix singularities and CFT correlation functions

Carlos Cardona, Yu-tin Huang

摘要:

本文研究了四维平坦空间S-矩阵与Pasterski等人提出的二维CFT之间的对应关系,证明了如果在每个顶点上施加质量守恒,则n点立方图的因子分解奇点可以再现AdS Witten图.如果我们把四维S-矩阵看作是一个紧致化的无质量的五维理论,那么这样的构型自然会出现。这种识别使我们能够重写无质量的S-矩阵的CHY公式,其中的分解奇点被重新解释为黎曼球的分解极限。在这种情况下,地图被重铸成2d/2d对应的形式。

英文摘要:

In this note, we explore the correspondence between four-dimensional flat space S-matrix and two-dimensional CFT proposed by Pasterski et al. We demonstrate that the factorization singularities of an n-point cubic diagram reproduces the AdS Witten diagrams if mass conservation is imposed at each vertex. Such configuration arises naturally if we consider the 4-dimensional S-matrix as a compactified massless 5-dimensional theory. This identification allows us to rewrite the massless S-matrix in the CHY formulation, where the factorization singularities are re-interpreted as factorization limits of a Riemann sphere. In this light, the map is recast into a form of 2d/2d correspondence.

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