V_ud and V_us: CKM 2010 working group I summary
arXiv:1112.0238
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.
Proceedings of CKM2010, the 6th International Workshop on the CKM Unitarity Triangle, University of Warwick, UK, 6-10 September 2010. Corresponding authors: A. Young (aryoung@ncsu.edu) and T. Spadaro (tommaso.spadaro@lnf.infn.it). 25 pages, 12 figures