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2021

Holographic Symmetry Algebras for Gauge Theory and Gravity

Guevara, Alfredo, Himwich, Elizabeth, Pate, Monica et al.

Understand

All 4D gauge and gravitational theories in asymptotically flat spacetimes contain an infinite number of non-trivial symmetries.

They can be succinctly characterized by generalized 2D currents acting on the celestial sphere.
A complete classification of these symmetries and their algebras is an open problem.
Here we construct two towers of such 2D currents from positive-helicity photons, gluons, or gravitons with integer conformal weights.