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.
J. ABDALLAH, P. ABREU, W. ADAM, P. ADZIC, T. ALBRECHT, R. ALEMANY-FERNANDEZ, et al. (2008). Measurement of the tau lepton polarisation at LEP2. PHYSICS LETTERS. SECTION B, 659, 65-73 [10.1016/j.physletb.2007.10.022].
Measurement of the tau lepton polarisation at LEP2
NAVARRIA, FRANCESCO LUIGI;PAIANO, SIMONE;PERROTTA, ANDREA;ROVELLI, TIZIANO;
2008
Abstract
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.File in questo prodotto:
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