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Determination of |V(ub)| from the measurement of the inclusive charmless semileptonic branching ratio of b hadrons

ALEPH Collaboration, The and Barate, R. and Bowdery, Christopher and Colrain, Paul and Finch, Alexander and Foster, Frank and Hughes, Gareth and Jones, Roger and Williams, Mark (1999) Determination of |V(ub)| from the measurement of the inclusive charmless semileptonic branching ratio of b hadrons. The European Physical Journal C (EPJ C) - Particles and Fields, 6 (4). pp. 555-574. ISSN 1434-6052

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Abstract

From a study of the kinematic properties of the final state produced in the semileptonic decays b→Xℓνℓ , the inclusive charmless semileptonic branching ratio of b hadrons is measured. With a sample of 3.6 million hadronic Z decays recorded between 1992 and 1995 with the ALEPH detector at LEP, the value Br(b→Xuℓνℓ) is determined to be (1.73±0.55stat±0.55syst)×10−3 , where Xu represents any charmless hadronic state and b is a mixture of b hadrons weighted by their production rates. This measurement yields the result |Vub|2=(18.68±5.94stat±5.94syst±1.45HQE)×10−6, where the last error comes from the conversion of the branching ratio to the CKM matrix element squared.

Item Type: Article
Journal or Publication Title: The European Physical Journal C (EPJ C) - Particles and Fields
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 63982
Deposited By: ep_importer_pure
Deposited On: 13 May 2013 09:58
Refereed?: Yes
Published?: Published
Last Modified: 08 Sep 2017 00:28
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/63982

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