A new measurement of the forward-backward asymmetry in Z→ bb 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 sin2θW eff, which is determined to be 0.2315 ± 0.0016 (stat.) ± 0.0009 (syst.), corresponding to an AFB b of 0.0992 ± 0.0084 (stat.) ± 0.0046 (syst.).

Buskulic, D., Casper, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., et al. (1994). A measurement of AFB b in lifetime tagged heavy flavour Z decays. PHYSICS LETTERS. SECTION B, 335(1), 99-108 [10.1016/0370-2693(94)91564-4].

A measurement of AFB b in lifetime tagged heavy flavour Z decays

CARPINELLI, Massimo;
1994

Abstract

A new measurement of the forward-backward asymmetry in Z→ bb 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 sin2θW eff, which is determined to be 0.2315 ± 0.0016 (stat.) ± 0.0009 (syst.), corresponding to an AFB b of 0.0992 ± 0.0084 (stat.) ± 0.0046 (syst.).
Articolo in rivista - Articolo scientifico
Physics
English
1994
335
1
99
108
none
Buskulic, D., Casper, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., et al. (1994). A measurement of AFB b in lifetime tagged heavy flavour Z decays. PHYSICS LETTERS. SECTION B, 335(1), 99-108 [10.1016/0370-2693(94)91564-4].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390391
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