A measurement of the b-quark mass from hadronic Z decays

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...

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Bibliographic Details
Published inThe European physical journal. C, Particles and fields Vol. 18; no. 1; pp. 1 - 13
Main Author Barate et al, R.
Format Journal Article
LanguageEnglish
Published Heidelberg Springer Nature B.V 01.12.2000
Springer Verlag (Germany)
Subjects
Flavors
High Energy Physics - Experiment
Physics
Quarks
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Summary: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 \(y_3\) distribution, which is the observable with the smallest hadronization corrections and systematic uncertainties, the result isThe measured ratio is alternatively employed to test the flavour independence of the strong coupling constant for b and light quarks.
ISSN:1434-6044
1434-6052
DOI:10.1007/s100520000533