论文标题
在循环的天体振幅上，仪表理论和重力
On loop celestial amplitudes for gauge theory and gravity
论文作者
论文摘要
Minkowski空间中无质量颗粒的散射幅度可以通过将动量空间振幅转化为零无穷大的天体球体上的相关函数来以形式表达。在本文中，我们研究了环级和重力子的天体振幅。我们专注于携带全毛和单肌外线的理性振幅。由于这些幅度是有限的，因此它们提供了Yang-Mills和重力理论的天体振幅的具体例子。我们给出了四个和五点功能的明确示例，并评论更高点振幅。
Scattering amplitudes of massless particles in Minkowski space can be expressed in a conformal basis by Mellin transforming the momentum space amplitudes to correlation functions on the celestial sphere at null infinity. In this paper, we study celestial amplitudes of loop level gluons and gravitons. We focus on the rational amplitudes that carry all-plus and single-minus external helicities. Because these amplitudes are finite, they provide a concrete example of celestial amplitudes of Yang- Mills and gravity theory beyond tree level. We give explicit examples of four and five point functions and comment on higher point amplitudes.
