Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - A Measurement of the b quark mass from hadronic Z decays
AU - ALEPH Collaboration, The
AU - Barate, R.
AU - Bowdery, Christopher
AU - Finch, Alexander
AU - Foster, Frank
AU - Hughes, Gareth
AU - Jones, Roger
PY - 2000/12
Y1 - 2000/12
N2 - 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.
AB - 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.
U2 - 10.1007/s100520000533
DO - 10.1007/s100520000533
M3 - Journal article
VL - 18
SP - 1
EP - 13
JO - European Physical Journal C: Particles and Fields
JF - European Physical Journal C: Particles and Fields
SN - 1434-6044
IS - 1
ER -