Abstract
In little more than two years of operation the four LEP experiments have produced a wealth of results on τ lepton production and decay at the Z0 resonance. Cross section and forward-backward charge asymmetry measurements agree well with Standard Model expectations and, along with similar measurements from hadronic and other leptonic Z0 decays, permit extraction of electroweak parameters such as sin2 θW and constrain the value of the top quark mass in the Standard Model. New measurements of the τ lifetime and of the branching ratios for inclusive and many exclusive decays equal or better the precision of previous measurements. Measurements from LEP also confirm nonzero values for the average τ polarization and for the forward/backward τ polarization asymmetry, providing independent determinations of electroweak parameters. In addition, searches have been carried out for new phenomena in tau production and decay, such as lepton flavor violation and CP violation, but so far no evidence for such effects has emerged.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call