A new measurement of the forward-backward asymmetry in Z -> b bbar 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 sin^2(theta(w)eff), which is determined to be 0.2315 +/- 0.0016 (stat.) +/- 0.0009 (syst.), corresponding to an A(FB)b of 0.00992 +/- 0.0084 (stat.) +/- 0.0046 (stat.).

D., B., D., C., I., D., D., D., P., G., C., G., et al. (1994). A Measurement of A(FB)(b) In Lifetime Tagged Heavy Flavor Z Decays. PHYSICS LETTERS. SECTION B, 335(1), 99-108 [10.1016/0370-2693(94)91564-4].

A Measurement of A(FB)(b) In Lifetime Tagged Heavy Flavor Z Decays

BOTTIGLI, UBALDO;CIOCCI, MARIA AGNESE;MARROCCHESI, PIER SIMONE;
1994-01-01

Abstract

A new measurement of the forward-backward asymmetry in Z -> b bbar 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 sin^2(theta(w)eff), which is determined to be 0.2315 +/- 0.0016 (stat.) +/- 0.0009 (syst.), corresponding to an A(FB)b of 0.00992 +/- 0.0084 (stat.) +/- 0.0046 (stat.).
1994
D., B., D., C., I., D., D., D., P., G., C., G., et al. (1994). A Measurement of A(FB)(b) In Lifetime Tagged Heavy Flavor 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/11365/36628
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