A measurement of the forward-backward asymmetry of\(e^ + e^ - \to c\bar c\) and\(e^ + e^ - \to b\bar b\) at centre of mass energies on and near theZ0 peak usingD*± mesons
1993
A measurement is presented of the forwardbackward asymmetry of the processes\(e^ + e^ + \to c\bar c\) and\(e^ + e^ + \to b\bar b\) at centre of mass energies near 91 GeV. Decays of theZ0 into charm and bottom quarks are identified using 6507 chargedD* mesons, reconstructed in the decaysD*±→D0π±→(K∓π±)π±,D*±→D0π±→(K∓π±π0)π± andD*±→D0π±→(K∓π±π∓π±)π±. Thec quark asymmetry on theZ0 peak is measured to be
$$A_{FB}^c = 0.052 \pm 0.028(stat.) \pm 0.012(sys.).$$
The energy dependence of the asymmetry has been investigated at energies close to theZ0 peak. Consistency with the predictions of the Standard Model is found.
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