Elsevier

Physics Letters B

Volume 335, Issues 3–4, 8 September 1994, Pages 542-553
Physics Letters B

Measurement of the B0B0 mixing parameter and the Z → bb forward-backward asymmetry

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Abstract

We have measured the time integrated B0B0 mixing parameter and the forward-backward asymmetry in the process e+e → bb using hadronic events containing muons or electrons. The data sample corresponds to 1,044,000 hadronic decays of the Z. From a fit to the momentum and transverse momentum distributions for single lepton and dilepton events, we have determined the B0B0 mixing parameter to be χB = 0.123 ± 0.012 (stat.) ± 0.008 (sys.), and the bb forward-backward asymmetry at the effective center-of-mass energy √s = 91.30 GeV to be Abb = 0.087 ± 0.011 (stat.) ± 0.004 (sys.) This measurement corresponds to a value of the effective electroweak mixing angle of sin2θw = 0.2335 ± 0.0021.

Cited by (0)

1

Supported by the German Bundesministerium für Forschung und Technologie.

2

Supported by the Hungarian OTKA fund under contract number 2970.

3

Also supported by CONICET and Universidad Nacional de La Plata, CC 67, 1900 La Plata, Argentina.

4

Deceased.