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Improved measurement of the lifetime of the τ lepton
Wilson, Graham Wallace OPAL Collaboration Alexander, G. Allison, J. Altekamp, N. Ametewee, K. Anderson, K. J. Anderson, S. Arcelli, S. Asai, S.
Wilson, Graham Wallace
OPAL Collaboration
Alexander, G.
Allison, J.
Altekamp, N.
Ametewee, K.
Anderson, K. J.
Anderson, S.
Arcelli, S.
Asai, S.
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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.
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1996-05-09
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Elsevier
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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.