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arXiv · 2107.03240

Infrared photons and asymptotic symmetries

Zhengwen Liu·Pujian Mao
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Abstract

S-matrix elements exhibit universal factorization when multiple infrared photons are emitted in scattering processes. We explicitly show that the leading soft factorization of tree-level amplitudes with the emission of any number of soft photons can be interpreted as the Ward identity of the asymptotic symmetry of gauge theory.

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Zhengwen Liu, Pujian Mao. 2021-10-06. Infrared photons and asymptotic symmetries. https://doi.org/10.1016/j.physletb.2021.136698

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