Measurement of the polarization of tau leptons produced in Z decays

ALEPH Collaboration (1991) Measurement of the polarization of tau leptons produced in Z decays. Physics Letters B, 265 (3-4). pp. 430-444. ISSN 0370-2693

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Abstract

The polarization of τ leptons produced in the reaction e+e−→τ+τ− at the Z resonance has been measured using the τ decay modes eνeντ, μνμντ, πντ, ϱντ, and a1ντ. The mean value obtained is Pτ = −0.152±0.045, indicating that parity is violated in the neutral current process e+e− → τ+τ−. The result corresponds to a ratio of a neutral current vector and axial vector coupling constants of the τ lepton and a value of the electroweak mixing parameter sin2θw(M2Z) = 0.2302 ± 0.0058.

Item Type:
Journal Article
Journal or Publication Title:
Physics Letters B
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
?? NUCLEAR AND HIGH ENERGY PHYSICS ??
ID Code:
63792
Deposited By:
Deposited On:
07 May 2013 13:47
Refereed?:
Yes
Published?:
Published
Last Modified:
18 Sep 2023 00:40