Measurement of the strong coupling constant α"S for bottom quarks at the Z^0 resonance - L3 Collaboration; Adeva, B.; Adriani, O.; Aguilar-Benitez, M.; Akbari, H.; Alcaraz, J.; Aloisio, A.; Alverson, G.; Arefiev, A.; Bay, A.; Biland, A.; Bohm, A.; et al. (Elsevier)
We have measured the ratio of the strong coupling constants α"s for bottom quarks and light quarks at the Z^0 resonance, in order to test the flavour independence of the strong interaction. The coupling strength α"s has been determined from the fraction of events with three jets, measured for a sample of all hardronic events, and for inclusive muon and electron events. The b purity is evaluated to be 22% for the first data set and 87% for the inclusive lepton sample. We find α"s(b)α"s(udsc)=1.00+/- 0.05 (stat.)+/-0.06 (syst.).
http://linkinghub.elsevier.com/retrieve/pii/0370-2693(91)90118-A
Keywords: U