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A Precise measurement of the average b hadron lifetime

Research output: Contribution to journalJournal article

Published

Journal publication date1996
JournalPhysics Letters B
Journal number2
Volume369
Number of pages12
Pages151-162
Original languageEnglish

Abstract

An improved measurement of the average b hadron lifetime is performed using a sample of 1.5 million hadronic Z decays, collected during the 1991–1993 runs of ALEPH, with the silicon vertex detector fully operational. This uses the three-dimensional impact parameter distribution of lepton tracks coming from semileptonic b decays and yields an average b hadron lifetime of 1.533 ± 0.013 ± 0.022 ps.