1/L2 corrected soft photon theorem from a CFT3 Ward identity
Nabamita Banerjee, Karan Fernandes, Arpita Mitra
Abstract
A bstract Classical soft theorems applied to probe scattering processes on AdS 4 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 CFT 3 Ward identity. We derive a perturbed soft photon mode operator on a flat spacetime patch in global AdS 4 in terms of an integrated expression of the boundary CFT current. Using the same in the CFT 3 Ward identity, we recover the 1 /L 2 corrected soft photon factor derived from classical soft theorems.
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PhysicsGravitonPhotonSoft photonMathematical physicsOperator (biology)SpacetimeIdentity (music)Quantum electrodynamicsQuantum mechanicsGravitationTranscription factorGeneRepressorBiochemistryBremsstrahlungAcousticsChemistryBlack Holes and Theoretical PhysicsCosmology and Gravitation TheoriesPulsars and Gravitational Waves Research