论文标题
Sagex关于散射幅度的评论，第11章：软定理和天体振幅
The SAGEX Review on Scattering Amplitudes, Chapter 11: Soft Theorems and Celestial Amplitudes
论文作者
论文摘要
由于它们在对撞机物理学中物理可观察物中的计算中的重要作用，因此对散射幅度的软限制进行了广泛的研究。这些运动学限制中发生的普遍分解已被证明与与渐近或大型仪表对称性相关的保护定律有关。这种联系使人们对仪表和重力理论的对称性有了更深入的了解，并在促进本质的基础上重新理解了散射幅度的重新理解，这使得表现出了二维全球形式的结合态对称性。重铸或天体振幅具有保形场理论相关函数的许多特性，该函数提出了通往渐近平面时间全息描述的途径。在这篇综述中，我们将这些相互联系的发展考虑到我们对软定理，渐近对称性和保形场理论的理解，侧重于天体振幅的结构和对称性及其全息解释。
The soft limits of scattering amplitudes have been extensively studied due to their essential role in the computation of physical observables in collider physics. The universal factorisation that occurs in these kinematic limits has been shown to be related to conservation laws associated with asymptotic, or large, gauge symmetries. This connection has led to a deeper understanding of the symmetries of gauge and gravitational theories and to a reformulation of scattering amplitudes in a basis of boost eigenstates which makes manifest the two-dimensional global conformal symmetry of the celestial sphere. The recast, or celestial, amplitudes possess many of the properties of conformal field theory correlation functions which has suggested a path towards a holographic description of asymptotically flat spacetimes. In this review we consider these interconnected developments in our understanding of soft theorems, asymptotic symmetries and conformal field theory with a focus on the structure and symmetries of the celestial amplitudes and their holographic interpretation.
