Triviality, perturbation theory and $Z\to b \overline b$

Details Triviality, perturbation theory and $Z\to b \overline b$ Triviality, perturbation theory and $Z\to b \overline b$

1994-06-12

arxiv.org/abs/hep-ph/9406290v1

Phys.Lett. B335 (1994) 470-478

Physics

High Energy Physics

High Energy Physics - Phenomenology

12pages (incl. figs.), TIT/HEP--258,CERN-TH.7287/94

Scientific paper

10.1016/0370-2693(94)90379-4

We compute the large-$m_t$ contributions to the $Zb\overline b$ vertex in the Standard Model non-perturbatively using both the $1/\nc$ and the $1/\nf$ expansions. Triviality and its consequences for the perturbative result are systematically analyzed. In particular, we point out that the effect of triviality is already important at the two-loop level for a heavy Higgs ($600\gev

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