# A UV/EFT Correspondence for Cosmology

### APA

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

### MLA

Melville, Scott. A UV/EFT Correspondence for Cosmology. Perimeter Institute, Feb. 22, 2023, https://pirsa.org/23020060

### BibTex

@misc{ pirsa_23020060, doi = {10.48660/23020060}, url = {https://pirsa.org/23020060}, author = {Melville, Scott}, keywords = {Quantum Gravity}, language = {en}, title = {A UV/EFT Correspondence for Cosmology}, publisher = {Perimeter Institute}, year = {2023}, month = {feb}, note = {PIRSA:23020060 see, \url{https://pirsa.org}} }

Scott Melville University of Cambridge

## 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