The forward-backward asymmetry for charm quarks at the Z pole

From 1.4 million hadronic Z decays collected by the ALEPHdetector at LEP, an enriched sample of Z → cc events is extracted by requiring the presence of a high momentum D∗±. The charm quarkforward-backward charge asymmetry at the Z pole is measured to be AFB0.c = (8.0 ± 2.4) % corresponding to an effective electroweak mixing angle of sin2θWeff = 0.2302 ± 0.0054.