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Title:听Celestial holography and twistors

Abstract:The celestial holography program aims to describe scattering amplitudes of gauge theory and gravity in terms of a conformal field theory living on the celestial sphere.听 I will explain an approach to celestial holography based on twistors, which recasts it in a formulation much closer to ordinary holography.听 I will also discuss the role of gauge anomalies on twistor space, and a Green-Schwarz mechanism, in celestial holography at loop-level. This is joint with Natalie Paquette.

Seminar Physique Math茅matique
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