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Updated measurement of the tau lepton lifetime

Research output: Contribution to journalJournal article


Journal publication date1997
JournalPhysics Letters B
Journal number3-4
Number of pages11
Original languageEnglish


A new measurement of the mean lifetime of the τ lepton is presented. Three different analysis methods are applied to a sample of 90 000 τ pairs, collected in 1993 and 1994 with the ALEPH detector at LEP. The average of this measurement and those previously published by ALEPH is ττ = 290.1 ± 1.5 ± 1.1 fs.