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Scientific article
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English

Measurement of the lifetime of the tau lepton

Contributors

L3 Collaboration

Collaborators

Achard, Pablo; Ambrosi, Giovanni; Bourquin, Maurice; Braccini, Saverio; Chamizo Llatas, Maria; Deglon, Patrick; Extermann, Pierre; Field, John; Kienzle, Maria-Novella; Pohl, Martin; Sciarrino, Deborah

Published in

Physics letters. B, vol. 479, no. 1-3, p. 67-78

Publication date

2000

Abstract

The tau lepton lifetime is measured with the L3 detector at LEP using the complete data taken at centre-of-mass energies around the Z pole resulting in ττ=293.2±2.0(stat.)±1.5(syst.fs. The comparison of this result with the muon lifetime supports lepton universality of the weak charged current at the level of six per mille. Assuming lepton universality, the value of the strong coupling constant, αs is found to be αs(mτ2) = 0.319 ± 0.015 (exp) ± 0.014 (theory).

UNIGE affiliation entities

Citation (ISO format)

L3 Collaboration. Measurement of the lifetime of the tau lepton. In: Physics letters. B, 2000, vol. 479, n° 1-3, p. 67–78. doi: 10.1016/S0370-2693(00)00347-6

Main files (1)

Article (Published version)

Identifiers

Additional URL for this publication

http://www.sciencedirect.com/science/article/pii/S0370269300003476

Journal ISSN

0370-2693
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311downloads

Technical informations

Creation

16/01/2015 18:30:00

First validation

16/01/2015 18:30:00

Update

13/10/2025 21:42:55

Status update

14/03/2023 22:56:08

Last indexation

10/11/2026 17:15:45
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