Measurement of the forward-backward asymmetries for charm- and bottom-quark pair productions at <√s>=58GeV with electron tagging

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We have measured, with electron tagging, the forward-backward asymmetries of charm- and bottom-quark pair productions at <√s >=58.01GeV, based on 23,783 hadronic events selected from a data sample of 197pb⁻¹ taken with the TOPAZ detector at TRISTAN. The measured forward-backward asymmetries are AFBᶜ = -0.49 ± 0.20(stat.) ± 0.08 (sys.) and AFBᵇ = -0.64 ± 0.35(stat.) ± 0.13 (sys.), which are consistent with the standard model predictions.