$Ø(\GF^2\Mt^4)$ Electroweak Radiative Corrections to the $\PZ\Pb\Pbbar$ Vertex

Details $Ø(\GF^2\Mt^4)$ Electroweak Radiative Corrections to the $\PZ\Pb\Pbbar$ Vertex $Ø(\GF^2\Mt^4)$ Electroweak Radiative Corrections to the $\PZ\Pb\Pbbar$ Vertex

1993-05-17

arxiv.org/abs/hep-ph/9305273v1

Z.Phys.C60:193-198,1993

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 3 figures (postscript files attached), Latex, CERN-TH.6874/93

Scientific paper

10.1007/BF01650447

The leading heavy-top two-loop corrections to the \Zbb~vertex are determined from a direct evaluation of the corresponding Feynman diagrams in the large \Mt~limit. %The calculation is done in the naive %dimensional regularization scheme with anticommuting $\ga_5$. The leading one-loop top-mass effect is enhanced by $[1+\GF\Mt^2(9-\pi^2/3)/(8\pi^2\sqrt{2})]$. Our calculation confirms a recent result of Barbieri et al.

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