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

Bernd A. Kniehl; Alberto Sirlin

doi:10.1103/PhysRevD.51.3803

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

高能物理 - 唯象学 2009-10-28 v1

作者: Bernd A. Kniehl , Alberto Sirlin

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摘要

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.

引用

@article{arxiv.hep-ph/9401243,
  title  = {Observations Concerning the Magnitude of t \bar{t} Threshold Effects on Electroweak Parameters},
  author = {Bernd A. Kniehl and Alberto Sirlin},
  journal= {arXiv preprint arXiv:hep-ph/9401243},
  year   = {2009}
}

备注

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

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