Measurement of the average lifetime of b hadrons

Acciarri, M. ; Achard, P. ; Adriani, O. ; Aguilar-Benitez, M. ; Gurtu, A. ; et., al (1993) Measurement of the average lifetime of b hadrons Physics Letters B, 317 (3). pp. 474-484. ISSN 0370-2693

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The average lifetime of b hadrons has been measured using the L3 detector at LEP, running at √ s ≈ MZ. A b-enriched sample was obtained from 432538 hadronic Z events collected in 1990 and 1991 by tagging electrons and muons from semileptonic b hadron decays. From maximum likelihood fits to the electron and muon impact parameter distributions, the average b hadron lifetime was measured to be Τb = (1535 ± 35 ± 28) fs, where the first error is statistical and the second includes both the experimental and the theoretical systematic uncertainties.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:84331
Deposited On:25 Feb 2012 05:06
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