Observations Concerning the Magnitude of t \bar{t} Threshold Effects on Electroweak Parameters

Details Observations Concerning the Magnitude of t \bar{t} Threshold Effects on Electroweak Parameters Observations Concerning the Magnitude of t \bar{t} Threshold Effects on Electroweak Parameters

1994-01-12

arxiv.org/abs/hep-ph/9401243v1

Phys.Rev. D51 (1995) 3803-3810

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, latex, DESY 93-194, NYU-Th-93/12/01

Scientific paper

10.1103/PhysRevD.51.3803

We discuss a recent analysis of $t\bar{t}$ threshold effects and its implications for the determination of electroweak parameters. We show that the new formulation, when applied to the $\rho$ parameter for $m_t\approx158$~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 $t\bar{t}$ resonances.

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