Review of tau lifetime measurements
Abstract
The measurements of the mean lifetime of the tau lepton are reviewed. The conditions for measuring the lifetime at various e+e- colliders are compared and the analysis methods are briefly described. The new developments since the previous Workshop on Tau Lepton Physics are listed. The world average is tautau = 290.5 +- 1.0 fs. The LEP experiments dominate this average and have analyzed nearly all of their data. In anticipation of the next era of precision measurements at CLEO and the b factories, the important sources of systematic errors and the treatment of systematic biases are discussed.
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