NPA Seminar: Ryan Plestid, Caltech, “Effective field theory for QED corrections to beta decay”

Event time: 
Wednesday, May 8, 2024 - 1:00pm to 2:00pm
Wright Lab (), WL-216 (Conference Room) See map
272 Whitney Avenue
New Haven, CT 06511
Event description: 

Precision beta decay experiments require high order QED corrections including the (very large) effects of the nuclear Coulomb field. In this talk I will present new work that explains how to construct a low-energy effective field theory for long-distance QED effects in beta decay. I will explain how:

1) The Fermi function arrises from a re-summation of leading loop diagrams.
2) Radiative corrections can be systematically organized and partially resummed using renormalization group techniques.
3) How these corrections relate to recently observed tension in first-row CKM unitarity.

Host: David Moore

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