Spacetime and higher-spin symmetries in the de Sitter S-matrix
APA
Neiman, Y. (2019). Spacetime and higher-spin symmetries in the de Sitter S-matrix. Perimeter Institute. https://pirsa.org/19090026
MLA
Neiman, Yasha. Spacetime and higher-spin symmetries in the de Sitter S-matrix. Perimeter Institute, Sep. 05, 2019, https://pirsa.org/19090026
BibTex
@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}} }
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.