European Laboratory for Particle Physics (cern) the Forward-backward Asymmetry for Charm Quarks at the Z the Aleph Collaboration

The data set collected with the ALEPH detector from 1991 to 1995 at LEP has been analysed to measure the charm forward-backward asymmetry at the Z. Out of a total of 4.1 million hadronic Z decays, about 36000 high momentum D * + , D + and D 0 decays were reconstructed, of which 80% originate from Z → c¯ c events. The forward-backward asymmetry was measured at three energy points: