Title: Missing Corner in the Sky: Massless Three-Point Celestial Amplitudes

Speaker: Wenjie Ma（BIMSA）

Time: 14:00 on Wednesday, September 20, 2023

Location: Physics Building 106

Abstract: In this talk, I will present our recent results of the study of the massless three-point celestial amplitudes in Minkowski space. We found that when expanding in the (shadow) conformal basis for the incoming (outgoing) particle wave functions, the amplitudes take the standard form of correlators in two-dimensional conformal field theory. In particular, the three-point celestial gluon amplitudes take the form of a three-point function of a spin-one current with two spin-one primary operators, which strongly supports the relation between soft spinning particles and conserved currents. Moreover, the three-point celestial amplitudes of one graviton and two massless scalars take the form of a correlation function involving a primary operator of conformal weight one and spin two, whose level-one descendent is the supertranslation current.