Measurement of the Tau Lepton Polarisation at LEP2

Details Measurement of the Tau Lepton Polarisation at LEP2 Measurement of the Tau Lepton Polarisation at LEP2

2007-10-06

arxiv.org/abs/0710.1368v1

Phys.Lett.B659:65-73,2008

Physics

High Energy Physics

High Energy Physics - Experiment

17 pages, 5 figures, Accepted by Phys. Lett. B

Scientific paper

10.1016/j.physletb.2007.10.022

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.

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