An improved measurement of the forward-backward asymmetry in decays is presented, based on a sample of 4.1 million hadronic Z decays collected by ALEPH between 1991 and 1995. Data are analysed as a function of polar angle of the event axis and b purity. The event tagging efficiency and mean b-jet hemisphere charge are measured directly from data. From the measured forward-backward jet charge asymmetry, the b quark asymmetry at is determined to be: . In the context of the Standard Model this corresponds to a value of the effective weak mixing angle of .

Determination of AFBb using jet charge measurements in Z decays / R., B., D., B., D., D., P., G., C., G., J. P., L., A., L., E., M., M. N., M., J. Y., N., B., P., R., A., G., B., M. P., C., M., C., J. M., C., M., D., E., F., M., F.B., Garrido, L.l., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 426:(1998), pp. 217-230. [10.1016/S0370-2693(98)00345-1]

Determination of AFBb using jet charge measurements in Z decays

GREGORIO, ANNA;BOSISIO, LUCIANO;GIANNINI, GIANROSSANO;
1998-01-01

Abstract

An improved measurement of the forward-backward asymmetry in decays is presented, based on a sample of 4.1 million hadronic Z decays collected by ALEPH between 1991 and 1995. Data are analysed as a function of polar angle of the event axis and b purity. The event tagging efficiency and mean b-jet hemisphere charge are measured directly from data. From the measured forward-backward jet charge asymmetry, the b quark asymmetry at is determined to be: . In the context of the Standard Model this corresponds to a value of the effective weak mixing angle of .
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2563009
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