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Measurement of the tau polarization at LEP

ALEPH Collaboration, The and Heister, A. and Bouhova-Thacker, Evelina and Bowdery, Christopher and Finch, Alexander and Foster, Frank and Hughes, Gareth and Jones, Roger (2001) Measurement of the tau polarization at LEP. European Physical Journal C: Particles and Fields, 20 (3). pp. 401-430. ISSN 1434-6044

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Abstract

The polarisation of τ 's produced in Z decay is measured using 160 pb −1 of data accumulated at LEP by the ALEPH detector between 1990 and 1995. The variation of the polarisation with polar angle yields the two parameters Ae=0.1504±0.0068 and Aτ=0.1451±0.0059 which are consistent with the hypothesis of e- τ universality. Assuming universality, the value Ae-τ=0.1474±0.0045 is obtained from which the effective weak mixing angle sin2θeffW=0.23147±0.00057 is derived.

Item Type: Article
Journal or Publication Title: European Physical Journal C: Particles and Fields
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 63930
Deposited By: ep_importer_pure
Deposited On: 07 May 2013 11:02
Refereed?: Yes
Published?: Published
Last Modified: 21 Sep 2017 05:34
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/63930

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