29 July 2019 to 2 August 2019
Northeastern University
US/Eastern timezone

Bootstrapping Inflationary Correlators

29 Jul 2019, 17:00
20m
West Village G 106 (Northeastern University)

West Village G 106

Northeastern University

Oral Presentation Field & String Theory Field & String Theory

Speaker

Hayden Lee

Description

The central idea of the bootstrap approach is to constrain observables directly from consistency conditions, eschewing the complexity of the Lagrangian formalism. In this talk, I will adopt this viewpoint and discuss how the structure of correlation functions in inflation is controlled by (approximate) conformal symmetry and singularities, focusing on three- and four-point functions at tree level. In particular, I will describe classes of differential operators that shift the masses and spins of external/internal particles, allowing general inflationary correlators to be written in terms of a few seed functions. I will also highlight spectroscopic signatures encoded in these correlators, which can be searched for in future cosmological observations.

Primary author

Hayden Lee

Co-authors

Nima Arkani-Hamed (IAS) Daniel Baumann Guilherme Pimentel

Presentation Materials