Virtual Top-Quark Effects on the {ital H}{r_arrow}{ital b}{bar {ital b}} Decay at Next-to-Leading Order in QCD
Journal Article
·
· Physical Review Letters
- Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut), Foehringer Ring 6, 80805 Munich (Germany)
By means of a heavy-top-quark effective Lagrangian, we calculate the three-loop corrections of O({alpha}{sup 2}{sub s}G{sub F}M{sup 2}{sub t}) to the H{r_arrow}b{bar b} partial decay width of the standard-model Higgs boson with intermediate mass M{sub H}{lt}2M{sub t}. We take advantage of a soft-Higgs theorem to construct the relevant coefficient functions. We present our result both in the {ovr MS} and on-shell schemes of mass renormalization. The {ovr MS} formulation turns out to be favorable with regard to the convergence behavior. We also test a recent idea concerning the na{umlt i}ve nonabelianization of QCD. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 475303
- Journal Information:
- Physical Review Letters, Vol. 78, Issue 4; Other Information: PBD: Jan 1997
- Country of Publication:
- United States
- Language:
- English
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