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Nov 6 2023

High Energy Physics Seminar-“On Field theory of the Fermi function” with Prof. Richard Hill

Physics Seminar

November 6, 2023

11:00 AM - 12:00 PM


SES 2418

Physics Seminar

Title: “On Field theory of the Fermi function”

Abstract: The Fermi function F ( Z, E ) accounts for QED corrections to beta decays that are enhanced at either small electron velocity β or large nuclear charge Z. For precision applications, the Fermi function must be combined with other radiative corrections and with scale- and scheme-dependent hadronic matrix elements. We formulate the Fermi function as a field theory object and present a new factorization formula for QED radiative corrections to beta decays. We provide new results for the anomalous dimension of the corresponding effective operator complete through three loops, and resum perturbative logarithms and π-enhancements with renormalization group methods. Our results are important for tests of fundamental physics with precision beta decay and related processes.


Physics Office

Date posted

Oct 20, 2023

Date updated

Oct 20, 2023