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Paper detail

First row CKM unitarity

In this talk I briefly review the precision test of the first row CKM unitarity, focusing mainly on $V_{ud}$ and $V_{us}$ extracted from pion, kaon, neutron and superallowed nuclear beta decays. I will discuss the current status of several important Standard Model theory inputs to these processes, and the need for future improvements.

preprint2022arXivOpen access
Chien-Yeah Seng
hep-exhep-phnucl-exhep-latnucl-th
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Chien-Yeah Seng

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