PIRSA:26060046

Video URL

https://pirsa.org/26060046

New physics in old places

Plestid, R. (2026). New physics in old places. Perimeter Institute for Theoretical Physics. https://pirsa.org/26060046

Plestid, Ryan. New physics in old places. Perimeter Institute for Theoretical Physics, Jun. 01, 2026, https://pirsa.org/26060046 

          @misc{ scivideos_PIRSA:26060046,
            doi = {10.48660/26060046},
            url = {https://pirsa.org/26060046},
            author = {Plestid, Ryan},
            keywords = {Other Physics},
            language = {en},
            title = {New physics in old places},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2026},
            month = {jun},
            note = {PIRSA:26060046 see, \url{https://scivideos.org/pirsa/26060046}}
          }

Ryan Plestid California Institute of Technology (Caltech)

Talk numberPIRSA:26060046
DOI10.48660/26060046
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

"Low-energy" experiments involving atoms and/or nuclei have deep connections to open questions in particle physics: the nature of dark matter, the origin of neutrino mass, and CP-violation in the lepton sector. Processes of interest include neutrino-nucleus scattering, coherent muon conversion on nuclei, and superallowed beta decays. Many of these observables have been studied for decades, but never at the level of precision that current experiment demands. In this talk I will explain how (new) modern tools from effective field theory allow us to deliver sharp theoretical predictions for (old) low-energy observables relevant for modern fundamental physics. As a concrete example I will outline how to control multi-loop "long-distance" QED corrections to superallowed beta decays to obtain 100 ppm theoretical precision, and explain how this relates to tests of first-row CKM unitarity.