Observations Concerning the Magnitude of t t Threshold Effects on Electroweak Parameters
Abstract
We discuss a recent analysis of tt threshold effects and its implications for the determination of electroweak parameters. We show that the new formulation, when applied to the parameter for mt≈158~GeV, gives a result of similar magnitude to those previously obtained. In fact, it is quite close to our ``resonance'' calculation. We also present a simple estimate of the size of the threshold effects based on an elementary Bohr-atom model of tt resonances.
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