Onset of strong interactions in the Higgs sector of the standard model: [ital H][r arrow][ital f[bar f]] at two loops
Journal Article
·
· Physical Review Letters; (United States)
- Department of Physics, University of Wisconsin, 1150 University Avenue, Madison, Wisconsin 53706 (United States) II. Institut fuer Theoretische Physik, Universitaet Hamburg, Luruper Chaussee 149, 22761 Hamburg (Germany)
We present the dominant two-loop [ital O]([ital G][sub [ital F]][sup 2][ital M][sub [ital H]][sup 4]) electroweak corrections to the fermionic decay widths of a high-mass Higgs boson in the standard model. The corrections are negative and quite significant, and are larger in magnitude than the one-loop electroweak corrections for [ital M][sub [ital H]][approx gt]400 GeV. This indicates the onset of a breakdown of perturbation theory in the Higgs sector of the standard model at a surprisingly low value of the Higgs-boson mass.
- DOE Contract Number:
- AC02-76ER00881
- OSTI ID:
- 7206846
- Journal Information:
- Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 72:16; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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