Select All
PIRSA:23020060

A UV/EFT Correspondence for Cosmology

APA

Melville, S. (2023). A UV/EFT Correspondence for Cosmology. Perimeter Institute for Theoretical Physics. https://pirsa.org/23020060

Scott Melville University of Cambridge

Talk numberPIRSA:23020060
Source RepositoryPIRSA
Collection

Abstract

Experimental searches for new fundamental physics are increasingly adopting an Effective Field Theory (EFT) approach, in which the phenomenological effects of the underlying high-energy (UV) physics are parametrised by a series of EFT coefficients that can be readily compared with data.
While pragmatically useful, this begs the question: what UV information can be extracted from our measurements of these EFT coefficients?
In this talk, I will describe how scattering amplitudes techniques ("sum rules") can establish precise connections between EFT coefficients and the underlying UV physics.
In particular, I will focus on recent progress in applying these techniques in cosmology, where they have been used to connect our large-scale measurements of dark energy, gravitational waves and the CMB with properties of the underlying UV completion.

Zoom Link: https://pitp.zoom.us/j/99740767444?pwd=OTMxWlVDYitSTXdKdmlFRWxhdGl1dz09