1/L 2 corrected soft photon theorem from a CFT3 Ward identity

Nabamita Banerjee (Indian Institute of Science Education & Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal, Madhya Pradesh, 420 066, India) ; Karan Fernandes (Center of Astronomy and Gravitation, National Taiwan Normal University, Taipei, 11677, Taiwan) ; Arpita Mitra (Physics Division, National Center for Theoretical Sciences, Taipei, 10617, Taiwan; Department of Physics, Pohang University of Science and Technology, Pohang, 37673, Korea)

Classical soft theorems applied to probe scattering processes on AdS4 spacetimes predict the existence of perturbative 1/L 2 corrections to the soft photon and soft graviton factors of asymptotically flat spacetimes. In this paper, we establish that the 1/L 2 corrected soft photon theorem can be derived from a large N CFT3 Ward identity. We derive a perturbed soft photon mode operator on a flat spacetime patch in global AdS4 in terms of an integrated expression of the boundary CFT current. Using the same in the CFT3 Ward identity, we recover the 1/L 2 corrected soft photon factor derived from classical soft theorems.

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      "value": "Classical soft theorems applied to probe scattering processes on AdS4 spacetimes predict the existence of perturbative 1/L 2 corrections to the soft photon and soft graviton factors of asymptotically flat spacetimes. In this paper, we establish that the 1/L 2 corrected soft photon theorem can be derived from a large N CFT3 Ward identity. We derive a perturbed soft photon mode operator on a flat spacetime patch in global AdS4 in terms of an integrated expression of the boundary CFT current. Using the same in the CFT3 Ward identity, we recover the 1/L 2 corrected soft photon factor derived from classical soft theorems."
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Published on:
13 April 2023
Publisher:
Springer
Published in:
Journal of High Energy Physics , Volume 2023 (2023)
Issue 4
Pages 1-29
DOI:
https://doi.org/10.1007/JHEP04(2023)055
arXiv:
2209.06802
Copyrights:
The Author(s)
Licence:
CC-BY-4.0

Fulltext files: