par Abdallah, Jalal Mohamad;Bertrand, Daniel ; [et al.]
Référence Physics letters. Section B, 659, page (65-73)
Publication Publié, 2008
Article révisé par les pairs
Résumé : A first measurement of the average polarisation Pτ 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 Pτ = - 0.164 ± 0.125 is consistent with the Standard Model prediction for the mean LEP energy of 197 GeV. © 2007 Elsevier B.V. All rights reserved.