V_ud and V_us: CKM 2010 working group I summary
Tommaso Spadaro, Albert Young
TL;DR
This paper reviews the current status of CKM matrix tests and weak coupling universality, highlighting recent experimental updates and their implications for new physics constraints.
Contribution
It provides an updated summary of CKM matrix elements, lepton flavor violation tests, and K-Kbar mixing, emphasizing recent high-precision measurements and their theoretical significance.
Findings
Updated CKM matrix element values
Constraints on new physics models from precision tests
Progress in lepton flavor-violation and K-Kbar mixing measurements
Abstract
The present status of universality tests of the weak couplings for quarks and leptons is reviewed, with updated information for the muon lifetime and for first-row inputs in the CKM matrix. We discuss the impact of this high-precision SM test in constraining new physics models. We also discuss a precise lepton flavor-violation test from leptonic K decays and recent progress in K-Kbar mixing.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · Medical Imaging Techniques and Applications