On the scheme dependence of the Electroweak radiative corrections

Abstract

We study the scheme dependence of the two-loop expression for the $\rho$-parameter of the Standard Model in the heavy $t$-quark mass limit $m_t\gg m_w$. In the $\ms$-scheme the two-loop electroweak correction to the $\mathcal{O}(m_t^2)$ term in $\dr$ is found greater than the QCD $\as$-correction.

arXiv comment9 pages (Latex) + 4 figures (Postscr.), Preprint PITT-TH-94-04