Calculation of two-loop top-quark and Higgs-boson corrections in the electroweak Standard Model

Details Calculation of two-loop top-quark and Higgs-boson corrections in the electroweak Standard Model Calculation of two-loop top-quark and Higgs-boson corrections in the electroweak Standard Model

1996-11-27

arxiv.org/abs/hep-ph/9611445v1

Nucl.Instrum.Meth.A389:318-322,1997

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, to appear in the Proceedings of AIHENP'96, Lausanne, Sept. 2-6, 1996. The paper is also available via www at http:/

Scientific paper

10.1016/S0168-9002(97)00116-2

A combination of algebraical and numerical techniques for calculating two-loop top-quark and Higgs-boson corrections to electroweak precision observables like $\Delta r$ or the $\rho$-parameter is presented. The renormalization is performed within the on-shell scheme. The results of the calculations are valid for arbitrary values of $m_t$, $M_H$ and of the gauge-boson masses. An example is treated where the full result is compared to the result obtained via an expansion up to next-to-leading order in $m_t$. As an application, results for the Higgs-mass dependent top-contributions to $\Delta r$ are given.

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