Hadronization properties of b quarks compared to light quarks in e+e- -> q qbar from 183 to 200 GeV

Details Hadronization properties of b quarks compared to light quarks in e+e- -> q qbar from 183 to 200 GeV Hadronization properties of b quarks compared to light quarks in e+e- -> q qbar from 183 to 200 GeV

2001-03-15

arxiv.org/abs/hep-ex/0103022v1

Phys.Lett.B479:118-128,2000; Erratum-ibid.B492:398,2000

Physics

High Energy Physics

High Energy Physics - Experiment

13 pages, 2 figures

Scientific paper

10.1016/S0370-2693(00)00312-9

The DELPHI detector at LEP has collected 54 pb^{-1} of data at a centre-of-mass energy around 183 GeV during 1997, 158 pb^{-1} around 189 GeV during 1998, and 187 pb^{-1} between 192 and 200 GeV during 1999. These data were used to measure the average charged particle multiplicity in e+e- -> b bbar events, _{bb}, and the difference delta_{bl} between _{bb} and the multiplicity, _{ll}, in generic light quark (u,d,s) events: delta_{bl}(183 GeV) = 4.55 +/- 1.31 (stat) +/- 0.73 (syst) delta_{bl}(189 GeV) = 4.43 +/- 0.85 (stat) +/- 0.61 (syst) delta_{bl}(200 GeV) = 3.39 +/- 0.89 (stat) +/- 1.01 (syst). This result is consistent with QCD predictions, while it is inconsistent with calculations assuming that the multiplicity accompanying the decay of a heavy quark is independent of the mass of the quark itself.

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