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A Measurement of the b quark mass from hadronic Z decays

ALEPH Collaboration, The and Barate, R. and Bowdery, Christopher and Finch, Alexander and Foster, Frank and Hughes, Gareth and Jones, Roger (2000) A Measurement of the b quark mass from hadronic Z decays. European Physical Journal C: Particles and Fields, 18 (1). pp. 1-13. ISSN 1434-6044

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Hadronic Z decay data taken with the ALEPH detector at LEP1 are used to measure the three-jet rate as well as moments of various event-shape variables. The ratios of the observables obtained from b-tagged events and from an inclusive sample are determined. The mass of the b quark is extracted from a fit to the measured ratios using a next-to-leading order prediction including mass effects. Taking the first moment of the y3 distribution, which is the observable with the smallest hadronization corrections and systematic uncertainties, the result is mb(MZ)=[3.27±0.22(stat)±0.22(exp)±0.38(had)±0.16(theo)]\gevcc. The measured ratio is alternatively employed to test the flavour independence of the strong coupling constant for b and light quarks.

Item Type: Journal Article
Journal or Publication Title: European Physical Journal C: Particles and Fields
Departments: Faculty of Science and Technology > Physics
ID Code: 63940
Deposited By: ep_importer_pure
Deposited On: 08 May 2013 11:24
Refereed?: Yes
Published?: Published
Last Modified: 13 Jun 2018 04:01
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