Measurement of the forward-backward asymmetry of charm and bottom quarks at theZ pole usingD *� mesons

FB , h a v e been measured by the four LEP experiments at centre-of-mass energies close to the Z boson mass, using a variety o f h e a vy avour identication techniques and analysis methods. The procedure adopted to combine these measurements is described here. It takes into account the statistical and systematic correlations among the measurements and their interdependences in a 2 minimisation. The procedure is illustrated using published measurements.

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Measurement of the b forward-backward asymmetry and mixing using high-p⊥ leptons

Buskulic¹,

Debonis²,

Décamp³

et al. 1996

Physics Letters B

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The B0 - B0 average mixing parameter χ and b forward-backward asymmetry A0FB (b) are measured from a sample of about 4 200 000 Z -> qq events recorded with the ALEPH detector at LEP in the years 1990-1995. High transverse momentum electrons and muons produced in b semileptonic decays provide the tag of the quark flavour and of its charge. The average mixing parameter and the pole b asymmetry are measured to be χ = 0.1246 +/- 0.0051stat +/- 0.0052syst, A0FB (b) = 0.1008 +/- 0.0043stat +/- 0.0028syst. The value of sin2θeffW = 0.23198 +/- 0.00092 is extracted from the asymmetry measurement

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Measurement of the forward-backward asymmetry of charm and bottom quarks at theZ pole usingD *� mesons

Cited by 5 publications

References 15 publications

Heavy-flavour production asymmetry

Heavy-flavour production asymmetry

Combining heavy flavour electroweak measurements at LEP

Measurement of the b forward-backward asymmetry and mixing using high-p⊥ leptons

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