| Jahr | 2000 |
| Autor(en) | R. Barate et al. |
| Titel | A Measurement of the b-quark Mass from hadronic Z Decays |
| KIP-Nummer | HD-KIP 00-111 |
| KIP-Gruppe(n) | ALEPH |
| Dokumentart | Paper |
| Quelle | Eur. Phys. J.C. (2000) |
| Abstract (en) | 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 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)] GeV/c2 . The measured ratio is alternatively employed to test the flavour independence of the strong coupling constant for b and light quarks. |
| URL | pdf-link |
| URL | link |
