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arXiv · hep-ex/0410034

Measurement of Rb in e+e- Collisions at 182 - 209 GeV

The OPAL Collaboration·G. Abbiendi
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Abstract

Measurements of Rb, the ratio of the bbbar cross-section to the qqbar 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 GeV 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.

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The OPAL Collaboration, G. Abbiendi. 2004-10-13. Measurement of Rb in e+e- Collisions at 182 - 209 GeV. https://doi.org/10.1016/j.physletb.2005.01.031

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