Abstract
Classical soft theorems applied to probe scattering processes on AdS4 spacetimes predict the existence of perturbative 1/L2 corrections to the soft photon and soft graviton factors of asymptotically flat spacetimes. In this paper, we establish that the 1/L2 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/L2 corrected soft photon factor derived from classical soft theorems.
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Banerjee, N., Fernandes, K. & Mitra, A. 1/L2 corrected soft photon theorem from a CFT3 Ward identity. J. High Energ. Phys. 2023, 55 (2023). https://doi.org/10.1007/JHEP04(2023)055
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DOI: https://doi.org/10.1007/JHEP04(2023)055