2000
DOI: 10.1007/s100520000533
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A measurement of the b-quark mass from hadronic Z decays

Abstract: 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 s… Show more

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Cited by 29 publications
(1 citation statement)
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“…The jet rates (especially the Durham and Cambridge algorithms and certain members of the JADE family) are among the few observables for which the pure NLO calculation gives a reasonable description of the distribution (cf table 3 of [88]). One particularly interesting set of NLO studies makes use of the three-jet rate as a function of y cut (this is just the integral of the distribution of y 23 ) in events with primary b-quarks as compared to light-quark events [176][177][178][179][180] (some of the analyses use other observables, such as the four-jet rate or the thrust). Using NLO calculations which account for massive quarks [181][182][183] makes it possible, in such studies, to extract a value for the b mass at a renormalization scale of M Z , giving first evidence of the (expected) running of the b-quark mass, since all the analyses find M b (M Z ) in the range 2.6-3.3 GeV (with rather variable estimates of the theoretical error).…”
Section: Other Perturbative Studiesmentioning
confidence: 99%
“…The jet rates (especially the Durham and Cambridge algorithms and certain members of the JADE family) are among the few observables for which the pure NLO calculation gives a reasonable description of the distribution (cf table 3 of [88]). One particularly interesting set of NLO studies makes use of the three-jet rate as a function of y cut (this is just the integral of the distribution of y 23 ) in events with primary b-quarks as compared to light-quark events [176][177][178][179][180] (some of the analyses use other observables, such as the four-jet rate or the thrust). Using NLO calculations which account for massive quarks [181][182][183] makes it possible, in such studies, to extract a value for the b mass at a renormalization scale of M Z , giving first evidence of the (expected) running of the b-quark mass, since all the analyses find M b (M Z ) in the range 2.6-3.3 GeV (with rather variable estimates of the theoretical error).…”
Section: Other Perturbative Studiesmentioning
confidence: 99%