A new measurement of the forward-backward asymmetry in Z→ bView the MathML source decays is presented. Hadrons from b decays are tagged using their long lifetimes. The b quark charge and direction are reconstructed with a hemisphere charge algorithm. The asymmetry and reconstructed b hemisphere charge are measured in the 69 pb−1 of data collected by ALEPH during 1991, 1992 and 1993. They are used to extract sin2θWeff, which is determined to be 0.2315 ± 0.0016 (stat.) ± 0.0009 (syst.), corresponding to an AFBb of 0.0992 ± 0.0084 (stat.) ± 0.0046 (syst.).
A measurement of AFBb in lifetime tagged heavy flavour Z decays / D. Buskulic;D. Casper;I. De Bonis;D. Decamp;P. Ghez;C. Goy;J.-P. Lees;M.-N. Minard;P. Odier;B. Pietrzyk. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - ELETTRONICO. - 335:(1994), pp. 99-108. [10.1016/0370-2693(94)91564-4]
A measurement of AFBb in lifetime tagged heavy flavour Z decays
FOCARDI, ETTORE;
1994
Abstract
A new measurement of the forward-backward asymmetry in Z→ bView the MathML source decays is presented. Hadrons from b decays are tagged using their long lifetimes. The b quark charge and direction are reconstructed with a hemisphere charge algorithm. The asymmetry and reconstructed b hemisphere charge are measured in the 69 pb−1 of data collected by ALEPH during 1991, 1992 and 1993. They are used to extract sin2θWeff, which is determined to be 0.2315 ± 0.0016 (stat.) ± 0.0009 (syst.), corresponding to an AFBb of 0.0992 ± 0.0084 (stat.) ± 0.0046 (syst.).
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