Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2006-10-10
Int.J.Mod.Phys. A21 (2006) 5660-5666
Physics
High Energy Physics
High Energy Physics - Experiment
Presented at Charm 2006, International Workshop on Tau-Charm Physics, June 05-07 2006, Beijing, China
Scientific paper
10.1142/S0217751X06034872
Some recent $\tau$-physics results are presented from the BaBar and Belle experiments at the SLAC and KEK B factories, which produce copious numbers of $\tau$-lepton pairs. Measurements of the tau mass and lifetime allow to test lepton universality and CPT invariance, while searches for lepton-flavour violation in tau decays are powerful ways to look for physics beyond the Standard Model. In semihadronic, non-strange tau decays, the vector hadronic final state is particularly important in helping determine the hadronic corrections to the anomalous magnetic moment of the muon, while studies of strange final states are the best available ways to measure the CKM matrix element $V_{\rm us}$ and the mass of the strange quark.
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