Test of the flavour independence of αs

, ALEPH Collaboration (1995) Test of the flavour independence of αs. Physics Letters B, 355 (1-2). pp. 381-393. ISSN 0370-2693

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Using about 950000 hadronic events collected during 1991 and 1992 with the ALEPH detector, the ratios and have been measured in order to test the flavour independence of the strong coupling constant αs. The analysis is based on event-shape variables using the full hadronic sample, two b-quark samples enriched by lepton tagging and lifetime tagging, and a light-quark sample enriched by lifetime antitagging. The combined results are rb = 1.002±0.023 and ruds = 0.971 ± 0.023.

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Journal Article
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Physics Letters B
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09 May 2013 14:22
Last Modified:
21 Nov 2022 23:42