Measurements of the b quark forward-backward asymmetry around the Z0 peak using jet charge and vertex charge

The OPAL Collaboration

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19 Scopus citations

Abstract

The b quark forward-backward asymmetry has been measured using approximately four million hadronic Z0 decays collected with the OPAL detector at LEP. Both jet charge and vertex charge were used to estimate whether the b quark was produced in the forward or backward thrust hemisphere. The measured values corrected to the hadron-level thrust axis are AFB b = 0.041 ±0.021 ±0.002 √s = 89.44 GeV AFB b = 0.0994 ±0.0052 ±0.0044 √s = 91.21 GeV AFB b = 0.145 ±0.017 ±0.007 √s = 92.91 GeV where in each case the first error is statistical and the second systematic. Within the framework of the Standard Model these measurements correspond to an effective weak mixing angle of sin2 θW eff,e = 0.2308 ± 0.0013. The measurements are in agreement with the Standard Model and other measurements at LEP.

Original languageEnglish
Pages (from-to)385-396
Number of pages12
JournalZeitschrift fur Physik C-Particles and Fields
Volume75
Issue number3
DOIs
StatePublished - 1 Jun 1997
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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