Measurement of |Vub| using b hadron semileptonic decay

Bailey, Ian Richard and Kartvelishvili, Vakhtang (2001) Measurement of |Vub| using b hadron semileptonic decay. European Physical Journal C: Particles and Fields, 21 (3). pp. 399-410. ISSN 1434-6044

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Abstract

The magnitude of the CKM matrix element |Vub| is determined by measuring the inclusive charmless semileptonic branching fraction of beauty hadrons at OPAL based on b→Xuℓν event topology and kinematics. This analysis uses OPAL data collected between 1991 and 1995, which correspond to about four million hadronic Z decays. We measure Br( b→Xuℓν) to be (1.63±0.53+0.55−0.62)×10−3. The first uncertainty is the statistical error and the second is the systematic error. From this analysis, |Vub| is determined to be: |Vub| = (4.00 ± 0.65(stat)+0.67−0.76(sys) ± 0.19(HQE)) × 10−3. The last error represents the theoretical uncertainties related to the extraction of |Vub| from Br( b→Xuℓν) using the Heavy Quark Expansion.

Item Type:
Journal Article
Journal or Publication Title:
European Physical Journal C: Particles and Fields
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2201
Subjects:
ID Code:
82930
Deposited By:
Deposited On:
16 Nov 2016 11:08
Refereed?:
Yes
Published?:
Published
Last Modified:
15 Jul 2020 06:26