Karlsruhe 2011 – scientific programme
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T: Fachverband Teilchenphysik
T 10: QCD (Theorie) I
T 10.9: Talk
Wednesday, March 30, 2011, 18:45–19:00, 30.23: 10-1
Determination of αs from tau decays at O(αs4) — •Jorge Mondejar Marin and Konstantin Chetyrkin — Institut für Theoretische Teilchenphysik, Karlsruhe Institut of Technology, 76128, Karlsruhe, Germany
We extract a numerical value for αs from the decay rate of a tau lepton into non-strange hadrons. We use the O(αs4) result for the vector correlator, and evaluate αs using either the MS or an effective-charge scheme.