PIRSA:23020060

A UV/EFT Correspondence for Cosmology

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

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

          @misc{ pirsa_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

Talk number PIRSA:23020060
DOI 10.48660/23020060
Collection
Talk Type Scientific Series
Subject

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