Abstract
We present the calculation of top quark mass corrections to three-jet rates in electron-positron annihilation at center of mass energies of 60 and 206 GeV. Furthermore, we also calculate the effects of quark-antiquark interactions on QCD model for three-jet rates. We extract the strong coupling constant, αs, through our results from the massive three-jet rate and the massless one. We observe that the effect of t quark on three jet rate does not contribute significantly to the calculations of strong coupling constant and we can ignore this effect in higher energies.
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