Celestial soft currents at one-loop and their OPEs

Understand

Conformally soft operators and their associated soft theorems on the celestial sphere encode the low energy behaviour of bulk scattering amplitudes.

• They lead to an infinite dimensional symmetry algebra of the celestial CFT at tree-level.
• In this paper, we introduce new operators in the celestial CFT in order to extend the definition of conformally soft currents to include one-loop effects.
• We then compute their OPEs with other operators in the theory.