Measurement of the running b-quark mass using e(+)e(-) -> b(b)over-barg events
We have studied the determination of the running b-quark mass, mb(MZ), using Z0 decays into 3 or more hadronic jets. We calculated the ratio of ≥ 3-jet fractions in e+e- → bb̄ versus e-e- qlq̄l (ql = u or d or s) events at next-to-leading order in perturbative QCD using six different infra-red- and...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
1999
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| Summary: | We have studied the determination of the running b-quark mass, mb(MZ), using Z0 decays into 3 or more hadronic jets. We calculated the ratio of ≥ 3-jet fractions in e+e- → bb̄ versus e-e- qlq̄l (ql = u or d or s) events at next-to-leading order in perturbative QCD using six different infra-red- and collinear-safe jet-finding algorithms. We compared with corresponding measurements from the SLD Collaboration and found a significant algorithm-dependence of the fitted mb(MZ) value. Our best estimate, taking correlations into account, is mb(MZ) = 2.56 ± 0.27 (stat.) -0.38+0.28 (syst.) -1.48+0.49 (theor.) GeV/c2. © 1999 Published by Elsevier Science B.V. All rights reserved. |
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