First Measurement of the Left-Right Charge Asymmetry in Hadronic Z Boson Decays and a New Determination of sin^2(theta_eff)

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dc.creatorSLD Collaboration
dc.creatorAbe, K.
dc.creatorAbe, K.
dc.creatorAbt, I.
dc.date1996-09-29
dc.date.accessioned2026-07-07T12:02:14Z
dc.date.available2026-07-07T12:02:14Z
dc.descriptionWe present the first measurement of the left-right charge asymmetry A_Q^{obs} in hadronic Z boson decays. This was performed at E_cm = 91.27 GeV with the SLD at the SLAC Linear Collider with a polarized electron beam. Using 89838 events, we obtain A_Q^{obs}=0.225+-0.056+-0.019 which leads to a measurement of the electron left-right asymmetry parameter, A_e=0.162+-0.041+-0.014, and sin^2(theta_eff)=0.2297+-0.0052 +-0.0018. Also, the A_Q^{obs} measurement combined with the left-right cross section asymmetry determines A_e independently of the value of the electron-beam polarization.
dc.description14 pages, RevTeX document with 1 eps (included) figure. Also available in gzip-compressed postscript form (64 Kb) at ftp://ftp.slac.stanford.edu/users/morris/qlr_preprint.ps.gz and /afs/slac.stanford.edu/public/users/morris/qlr_preprint.ps.gz. Uncompressed postscript file (244 Kb) available to DECNET users as SLC: :USER_DISK_SLC1:[MORRIS]qlr_preprint.ps
dc.identifierhttps://arxiv.org/abs/hep-ex/9609019
dc.identifierhttp://arxiv.org/abs/hep-ex/9609019
dc.identifierPhys.Rev.Lett.78:17-21,1997
dc.identifierdoi:10.1103/PhysRevLett.78.17
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/207369
dc.subjectHigh Energy Physics - Experiment
dc.titleFirst Measurement of the Left-Right Charge Asymmetry in Hadronic Z Boson Decays and a New Determination of sin^2(theta_eff)
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