Measurement of the Tau Lepton Polarisation at LEP2
arXiv:0710.1368 · doi:10.1016/j.physletb.2007.10.022
Abstract
A first measurement of the average polarisation P_tau of tau leptons produced in e+e- annihilation at energies significantly above the Z resonance is presented. The polarisation is determined from the kinematic spectra of tau hadronic decays. The measured value P_tau = -0.164 +/- 0.125 is consistent with the Standard Model prediction for the mean LEP energy of 197 GeV.
arXiv comment17 pages, 5 figures, Accepted by Phys. Lett. B
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