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V_ud and V_us: CKM 2010 working group I summary

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arxiv 1112.0238 v1 pith:H5QDVGIC submitted 2011-12-01 hep-ex

V_ud and V_us: CKM 2010 working group I summary

classification hep-ex
keywords discusstestconstrainingcouplingsdecaysfirst-rowflavor-violationgroup
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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