Using about 950000 hadronic events collected during 1991 and 1992 with the ALEPH detector, the ratios rb = αs b αs udsc and ruds = αs uds αs cb 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.

Buskulic, D., Casper, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., et al. (1995). Test of the flavour independence of αs. PHYSICS LETTERS. SECTION B, 355(1-2), 381-393 [10.1016/0370-2693(95)00713-U].

Test of the flavour independence of αs

CARPINELLI, Massimo;
1995

Abstract

Using about 950000 hadronic events collected during 1991 and 1992 with the ALEPH detector, the ratios rb = αs b αs udsc and ruds = αs uds αs cb 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.
Articolo in rivista - Articolo scientifico
Physics
English
1995
355
1-2
381
393
none
Buskulic, D., Casper, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., et al. (1995). Test of the flavour independence of αs. PHYSICS LETTERS. SECTION B, 355(1-2), 381-393 [10.1016/0370-2693(95)00713-U].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390316
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