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A Precise measurement of the average b hadron lifetime

Research output: Contribution to journalJournal article

Published
<mark>Journal publication date</mark>1996
<mark>Journal</mark>Physics Letters B
Issue number2
Volume369
Number of pages12
Pages (from-to)151-162
<mark>State</mark>Published
<mark>Original language</mark>English

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.