Date/Time: Wed Nov 27 2024 at 12:30<br/><br/>Location: Theory Room/Remote<br/><br/>Speaker: Wouter Dekens (INT)<br/><br/>Title: Scrutinizing the Cabibbo Angle Anomaly<br/><br/>Abstract: Recent developments have revealed a discrepancy between the measurements of the elements of the Cabibbo-Kobayashi-Maskawa matrix and the unitarity relation predicted by the Standard Model (SM). This so-called Cabibbo-Angle Anomaly (CAA) could point to new physics or be due to underestimated uncertainties in the SM description. To investigate the latter option, I will focus on the SM prediction of neutron and nuclear beta decays, which determine the CKM element Vud. I will outline how a framework based on effective field theory methods can pave the way toward well-controlled uncertainties, once combined with many-body calculations. In the second part of the talk, I will explore the possibility that the CAA is due to beyond-the-SM physics. I will describe a model-independent analysis that takes into account a variety of measurements, ranging from low-energy experiments to collider probes, and illustrate the simplest new-physics scenarios that can explain the CAA.
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Remote Connection:
https://ubc.zoom.us/j/62535266430?pwd=THVrUzhMdjAyVkNnM05OUWRZYUppZz09
Meeting ID: 625 3526 6430
Passcode: 307647
<br/><br/>Note special time!<br/><br/>______________________________<br/><br/>Detailed information available can be found at <a href='https://www.triumf.ca/research-program/lectures-conferences/upcoming-seminars-lectures'>https://www.triumf.ca/research-program/lectures-conferences/upcoming-seminars-lectures</a> <br/><br/>