Acciarri, M. ; Achard, P. ; Adriani, O. ; Gurtu, A. ; et., al (2000) Measurements of the bb̅ production cross section and forward-backward asymmetry at centre-of-mass energies above the Z pole at LEP Physics Letters B, 485 (1-3). pp. 71-84. ISSN 0370-2693
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/S0370-2693(00)00676-6
Abstract
The measurements of Rb= σ(e+e− → bb̅)/ σ(e+e− → qq̅) and of the b quark forward-backward charge asymmetry, Afbb, at centre-of-mass energies above the Z pole are described. The measurement of Rb is performed at √s between 130 and 189 GeV using a b-tagging method that exploits the relatively large decay length of b-hadrons. The measurement of Afbb is performed using the large statistics event sample collected at √s = 189 GeV with a lepton-tag analysis based on the selection of prompt muons and electrons. The results at √s = 189 GeV are Rb = 0.163±0.013(stat.)±0.005(syst.), Abfb = 0.61±0.18(stat.)±0.09(syst.).
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 83403 |
| Deposited On: | 21 Feb 2012 07:30 |
| Last Modified: | 21 Feb 2012 07:30 |
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