Using about 950000 hadronic events collected during 1991 and 1992 with the ALEPH detector, the ratios r(b) = alpha(s)(b)/alpha(s)(udsc) and r(uds) = alpha(s)(uds)/alpha(s)(cb) have been measured in order to test the flavour independence of the strong coupling constant alpha(s). 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 r(b) = 1.002 +/- 0.023 and r(uds) = 0.971 +/- 0.023.

Test of the Flavor Independence of Alpha(s) / Focardi, E., Casper, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J.P., Minard, M.N., Odier, P., Pietrzyk, B., Ariztizabal, F., Chmeissani, M., Crespo, J.M., Efthymiopoulos, I., Fernandez, E., Fernandezbosman, M., Gaitan, V., Garrido, L.I., Martinez, M., Orteu, S., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 355:(1995), pp. 381-393. [10.1016/0370-2693(95)00713-U]

Test of the Flavor Independence of Alpha(s)

FOCARDI, ETTORE;CIULLI, VITALIANO;
1995

Abstract

Using about 950000 hadronic events collected during 1991 and 1992 with the ALEPH detector, the ratios r(b) = alpha(s)(b)/alpha(s)(udsc) and r(uds) = alpha(s)(uds)/alpha(s)(cb) have been measured in order to test the flavour independence of the strong coupling constant alpha(s). 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 r(b) = 1.002 +/- 0.023 and r(uds) = 0.971 +/- 0.023.
1995
355
381
393
Focardi, Ettore; Casper, D.; Debonis, I.; Decamp, D.; Ghez, P.; Goy, C.; Lees, J. P.; Minard, M. N.; Odier, P.; Pietrzyk, B.; Ariztizabal, F.; Chmeiss...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/770629
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