Speaker: Kevin Costello (Perimeter)

Title: On the associativity of one loop corrections to the celestial OPE

Abstract: The celestial holography program suggests that collinear singularities in gauge theory and gravity can form the OPE coefficients of a two-dimensional CFT. We investigate whether known one-loop corrections to QCD collinear singularities satisfy the associativity conditions of an OPE. We find they do not, but that associativity can be restored for certain gauge groups by a certain Green-Schwarz mechanism. This is joint work with Natalie Paquette.


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