Measurements of charged current lepton universality and |Vus| using tau lepton decays to e-ν̄eντ, μ -ν̄μντ, π-ντ, and K -ντ

Using 467 fb ―1 of e + e ― annihilation data collected with the BABAR detector, we measure B(τ ― →μ ― ν μ ν τ ) B(τ ― →e ― ν e ν τ ) = ( 0 .9 796 ± 0 .0016 ± 0.0036), B(τ ― →π ― ν τ ) B(τ ― →e ― ν e ν τ ) (0.5945 ± 0.0014 ± 0.0061), and B(τ ― →K ― ν τ ) B(τ ― →e ― ν e ν τ ) = (0.03882 ± 0.00032 ± 0.00057), where the uncertainties are statistical and systematic, respectively. From these precision τ measurements, we test the standard model assumption of μ ― e and T — μ charge current lepton universality and provide determinations of |V us | experimentally independent of the decay of a kaon.