A measurement of τ polarization in Z0 decays

Adriani, O. ; Aguilar-Benitez, M. ; Ahlen, S. ; Gurtu, A. ; et., al (1992) A measurement of τ polarization in Z0 decays Physics Letters B, 294 (3-4). pp. 466-478. ISSN 0370-2693

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Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0370-2693(92)91549-O


The polarization of τ leptons produced in e+e- → τ+ τ-(γ) is measured using a sample of 8977 τ+ τ- pairs collected near the peak of the Z0 resonance. A polarization of −0.132±0.026(stat)±0.021(syst.) is determined. This corresponds to a ratio of the vector to the axial-vector coupling constants of the τ lepton to the weak neutral current of gV τ V /g τ Aeff = 0.067±0.017. This leads to a value of the effective sin2θw at the Z0 resonance of sin2θeff= 0.2326±0.0043.

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ID Code:83337
Deposited On:20 Feb 2012 06:19
Last Modified:20 Feb 2012 06:19

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