Improved measurement of the lifetime of the τ lepton

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Issue Date
1996-05-09
Author
Wilson, Graham Wallace
OPAL Collaboration
Alexander, G.
Allison, J.
Altekamp, N.
Ametewee, K.
Anderson, K. J.
Anderson, S.
Arcelli, S.
Asai, S.
Axen, D.
Azuelos, G.
Ball, A. H.
Barberio, E.
Publisher
Elsevier
Type
Article
Article Version
Scholarly/refereed, publisher version
Rights
This article is published by Elsevier under a Creative Commons Attribution License and available electronically from http://www.sciencedirect.com/science/article/pii/0370269396002559.
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Abstract
A new measurement of the τ lifetime is presented. It uses data collected with the Opal detector during 1994, which almost doubles the size of the Opal τ sample. Two statistically independent techniques are used: an impact parameter analysis of one-prong decay tracks and a fit to the decay length distribution of three-prong decays. The lifetime obtained from the 1994 data by combining the results of these methods is τ(τ) = 289.7 ± 2.5 (stat)± 1.5 (sys) fs. When combined with the previous Opal τ lifetime measurement the improved τ lifetime is τ(τ) = 289.2 ± 1.7 (stat.) ± 1.2 (sys.) fs.
URI
http://hdl.handle.net/1808/17627
DOI
https://doi.org/10.1016/0370-2693(96)00255-9
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Citation
Alexander, G. (1996). "Improved measurement of the lifetime of the τ lepton." Physics Letters B, 374(4):341-350. http://www.dx.doi.org/10.1016/0370-2693(96)00255-9.

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This article is published by Elsevier under a Creative Commons Attribution License and available electronically from http://www.sciencedirect.com/science/article/pii/0370269396002559.
Except where otherwise noted, this item's license is described as: This article is published by Elsevier under a Creative Commons Attribution License and available electronically from http://www.sciencedirect.com/science/article/pii/0370269396002559.