PIRSA:19090026

Spacetime and higher-spin symmetries in the de Sitter S-matrix

Neiman, Y. (2019). Spacetime and higher-spin symmetries in the de Sitter S-matrix. Perimeter Institute. https://pirsa.org/19090026

Neiman, Yasha. Spacetime and higher-spin symmetries in the de Sitter S-matrix. Perimeter Institute, Sep. 05, 2019, https://pirsa.org/19090026 

          @misc{ pirsa_PIRSA:19090026,
            doi = {10.48660/19090026},
            url = {https://pirsa.org/19090026},
            author = {Neiman, Yasha},
            keywords = {Quantum Gravity},
            language = {en},
            title = {Spacetime and higher-spin symmetries in the de Sitter S-matrix},
            publisher = {Perimeter Institute},
            year = {2019},
            month = {sep},
            note = {PIRSA:19090026 see, \url{https://pirsa.org}}
          }

Yasha Neiman Okinawa Institute of Science and Technology Graduate University

DOI 10.48660/19090026
Collection
Talk Type Scientific Series
Subject

Abstract

I will discuss the problem of an observer's S-matrix in de Sitter space, i.e. the mapping between fields on the initial and final horizons of a de Sitter static patch. I will show how the S-matrix of free massless fields can be packaged in a spinor-helicity language. This involves “cheating” the static patch’s painfully low symmetry, by relating each horizon separately to global, de Sitter-invariant data.

I will then discuss the important special case of higher-spin gravity in de Sitter, and argue that higher-spin symmetry prevents any corrections to the free S-matrix, except in the “soft" sector of zero frequencies.