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Updated measurement of the average B hadron lifetime

Research output: Contribution to journalJournal article


<mark>Journal publication date</mark>1992
<mark>Journal</mark>Physics Letters B
Number of pages13
<mark>Original language</mark>English


An improved measurement of the average lifetime of b hadrons has been performed with the ALEPH detector. From a sample of 260 000 hadronic Z0 decays, recorded during the 1991 LEP run with the silicon vertex detector fully operational, a fit to the impact parameter distribution of lepton tracks coming from semileptonic decays yields an average b hadron lifetime of 1.49 ± 0.03 ± 0.06 ps.