Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-09-14
Phys.Lett.B344:359-364,1995
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, Latex [ uses epsfig.sty, 3 figures not included ] A complete postscript file, including figures, is available via an
Scientific paper
10.1016/0370-2693(94)01568-W
The partial decay rate $\Gamma(Z\to b\bar{b})$ is significantly influenced by the mass of the top quark due to electroweak radiative corrections. The leading $\sim m_t^2$ and the next-to-leading contribution $\sim \ln m_t^2$ are known to be numerically of similar size. In this work we calculate the QCD corrections to the logarithmic correction using the heavy top mass expansion. The ${\cal O} (\alpha\as \ln m_t^2)$ corrections are of the same order as the QCD corrections to the quadratic top mass term, but of different sign.
Kwiatkowski A. A.
Steinhauser Matthias
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