Superallowed beta decays in effective field theory

Jun 11, 2025, 5:10 PM
20m
Langdon

Langdon

Parallel session presentation Nuclear Structure for Neutrinos and Astrophysics Nuclear Structure for Neutrinos and Astrophysics

Speaker

Wouter Dekens (INT, University of Washington)

Description

Testing the Standard Model (SM) prediction of unitarity of the Cabibbo-Kobayashi-Maskawa matrix in principle allows us to probe beyond- the-SM physics to very high energy scales. However, making the most out of these very precise measurements requires controlling theory predictions at a similar level of accuracy. In this talk, I will focus on the SM prediction for the nuclear beta decays that determine the up-down CKM element, one of the inputs to the unitarity test. I will outline how a framework based on effective field theory methods can pave the way towards well-controlled uncertainties, paying particular attention to the derivation of hadronic interactions at low energies and the required nuclear matrix elements.

Primary author

Wouter Dekens (INT, University of Washington)

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