2 papers
hep-th2024
Loop corrections versus marginal deformation in celestial holography
Song He, Pujian Mao, Xin-Cheng Mao
Four-dimensional all-loop amplitudes in QED and gravity exhibit universal Infrared (IR) singularities with a factorization structure. This structure is governed by tree amplitudes…
hep-th2024
Kinematic numerators from the worldsheet: cubic trees from labelled trees
Song He, Linghui Hou, Jintian Tian +1
In this note we revisit the problem of explicitly computing tree-level scattering amplitudes in various theories in any dimension from worldsheet formulas. The latter are known to…