Bootstrapping Inflationary Correlators

PIRSA ID: 19110148
Série : Particle Physics
Event Type: Seminar
Domaine(s) scientifique(s) :
Particle Physics
Date de fin :
Speaker(s):
  • Hayden Lee, Harvard University

The central idea of the bootstrap philosophy is to constrain observables directly from consistency conditions alone, bypassing the intricacies of the Lagrangian formalism. In this talk, I will adopt this viewpoint and describe a boundary-centric approach to determine cosmological correlators, following a perspective familiar from the modern studies of scattering amplitudes. Specifically, I will describe the symmetries and singularities of three- and four-point functions in de Sitter space and inflation, and explain how these principles can be used to fully determine the final answer without reference to bulk time evolution. I will also highlight spectroscopic features encoded in these correlators, relevant for the search of primordial non-Gaussianity in future cosmological observations.