Correlation measurements in Z→τ+τ− and the τ neutrino helicity

Buskulic, D. and Finch, Alexander (1994) Correlation measurements in Z→τ+τ− and the τ neutrino helicity. Physics Letters B, 321 (1-2). pp. 168-176. ISSN 0370-2693

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Using data collected with the ALEPH detector at LEP correlations between the decay products of the τ+ and τ− produced in the decay of the Z have been measured. The measurements performed in the decays τ→πν and τ→ϱν place limits on deviations from the Standard Model. These are given by the parameter ζ with ζ = −1 for the Standard Model. The measured values are ζπ = −0.95 ± 0.11 ± 0.05 and ζϱ = −1.03 ± 0.11 ± 0.05. For models which predict ζπ = ζϱ = ζ — interpreted as the average τ neutrino helicity — the measurement is ζ = −0.99 ± 0.07 ± 0.04.

Item Type: Journal Article
Journal or Publication Title: Physics Letters B
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100/3106
Departments: Faculty of Science and Technology > Physics
ID Code: 64100
Deposited By: ep_importer_pure
Deposited On: 08 May 2013 15:31
Refereed?: Yes
Published?: Published
Last Modified: 01 Jan 2020 08:27

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