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  • Letter
  • Open Access

Loop corrections versus marginal deformations in celestial holography

Song He1,2,4,5,*, Pujian Mao3,†, and Xin-Cheng Mao4,‡

  • *Contact author: hesong@jlu.edu.cn
  • †Contact author: pjmao@tju.edu.cn
  • ‡Contact author: maoxc1120@mails.jlu.edu.cn
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Phys. Rev. D 110, L081901 – Published 9 October, 2024

DOI: https://doi.org/10.1103/PhysRevD.110.L081901

Abstract

Four-dimensional all-loop amplitudes in quantum electrodynamics and gravity exhibit universal IR singularities with a factorization structure. This structure is governed by tree amplitudes and a universal IR-divergent factor representing the exchange of soft particles between external lines. This Letter offers a precise dual interpretation of these universal IR-divergent factors within celestial holography. Considering the tree amplitude as the foundation of the celestial conformal field theory (CCFT), these universal factors correspond to marginal deformations with a double-current construction in the CCFT. Remarkably, a novel geometric representation of these deformations through topological gauging provides an exact description of transitions within bulk vacuum moduli spaces which extends the celestial holography beyond the perturbative level. Our findings establish a concrete dictionary for celestial holography and offer a holographic lens to understand loop corrections in scattering amplitudes.

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Phys. Rev. D 110, L081901– Published 9 October, 2024
  • Received 17 July 2023
  • Accepted 19 September 2024
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