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Triviality, perturbation theory and $Z \to b\overline{b}$
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 trivialit...
| Autores principales: | , |
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| Lenguaje: | eng |
| Publicado: |
1994
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/0370-2693(94)90379-4 http://cds.cern.ch/record/264383 |
| Sumario: | 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<M_H<1\tev) even when the top mass is below 200\gev. |
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