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

Abstract

We have measured, with electron tagging, the forward-backward asymmetries of charm- and bottom-quark pair productions at $<\sqrt{s}>$=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 $A_{FB}^c=-0.49\pm 0.20(stat.)\pm 0.08(sys.)$ and $A_{FB}^b=-0.64\pm 0.35(stat.)\pm 0.13(sys.)$, which are consistent with the standard model predictions.

19 pages, Latex format (article), 5 figures included. to be published in Phys. Lett. B