Abstract
Measurements of R-b, the ratio of the b (b) over bar cross-section to the q (q) over bar cross-section in e(+)e(-) collisions, are presented. The data were collected by the OPAL experiment at LEP at centre-of-mass energies between 182 and 209 GeV Lepton, lifetime and event-shape information is used to tag events containing b quarks with high efficiency. The data are compatible with the Standard Model expectation. The mean ratio of the eight measurements reported here to the Standard Model prediction is 1.055 +/- 0.031 +/- 0.037, where the first error is statistical and the second systematic. (c) 2005 Elsevier B.V. All rights reserved.
Original language | English |
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Pages (from-to) | 212-225 |
Number of pages | 14 |
Journal | Physics Letters B |
Volume | 609 |
DOIs | |
Publication status | Published - 10 Mar 2005 |