  We 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.

High Energy Physics - Experiment