Using data collected with the BaBar detector at PEP-II at SLAC, we report on
several tau lepton measurements that are used to determine the modulus of the
Cabibbo-Kobayashi-Maskawa matrix element Vus, and to check the Standard Model
predictions of lepton universality and CPT conservation.Comment: To appear in the proceedings of the 2010 ICHEP meeting, 6 pages, 1
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