PIRSA:20100066

Video URL

https://pirsa.org/20100066

Asymptotic symmetries and celestial CFT

Donnay, L. (2020). Asymptotic symmetries and celestial CFT . Perimeter Institute for Theoretical Physics. https://pirsa.org/20100066

Donnay, Laura. Asymptotic symmetries and celestial CFT . Perimeter Institute for Theoretical Physics, Oct. 27, 2020, https://pirsa.org/20100066 

          @misc{ scivideos_PIRSA:20100066,
            doi = {10.48660/20100066},
            url = {https://pirsa.org/20100066},
            author = {Donnay, Laura},
            keywords = {Quantum Fields and Strings},
            language = {en},
            title = {Asymptotic symmetries and celestial CFT },
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2020},
            month = {oct},
            note = {PIRSA:20100066 see, \url{https://scivideos.org/index.php/pirsa/20100066}}
          }

Laura Donnay SISSA International School for Advanced Studies

Talk numberPIRSA:20100066
DOI10.48660/20100066
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

Universal relationships between asymptotic symmetries, QFT soft theorems, and low energy observables have reinvigorated attempts at flat space holography. In this talk, I will review recent advances in the celestial holography proposal, where the 4d S-matrix is reconsidered as a 2d correlator on the celestial sphere at null infinity. In this framework, asymptotic particle states are characterized by the point at which they enter or exit the celestial sphere as well as their SL(2,C) Lorentz quantum numbers: namely their conformal scaling dimension and spin instead of the energy and momentum. I will present a unified treatment of conformally soft Goldstone modes which arise when spin-one or spin-two conformal primary wavefunctions become pure gauge for certain integer values of the conformal dimension.