A precise measurement of the tau lepton lifetime

Buskulic, D. and Finch, Alexander (1992) A precise measurement of the tau lepton lifetime. Physics Letters B, 297 (3-4). pp. 432-448. ISSN 0370-2693

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Three different techniques are used to measure the mean decay length of the τ lepton with a high precision vertex detector in a sample of 11 800 τ pairs coming from Z decays, collected in1991 by ALEPH at LEP. Events in which both τ's decay into one charged track are analyzed using two largely independent methods. Displaced vertices in three-prong decays yield another independent measurement. The derived lifetime is 295.5 ± 5.9 ± 3.1 fs, using mτ = 1777.1 ± 0.5 MeV/c2. Including previous (1989–1990) ALEPH measurements, the combined τ lifetime is 294.7 ± 5.4 ± 3.0 fs.

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: 64117
Deposited By: ep_importer_pure
Deposited On: 07 May 2013 14:01
Refereed?: Yes
Published?: Published
Last Modified: 01 Jan 2020 08:27
URI: https://eprints.lancs.ac.uk/id/eprint/64117

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