Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-03-03
Mod.Phys.Lett. A14 (1999) 721-732
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTeX file, 9 page, 2 eps figures, some changes included
Scientific paper
The upper bound on the mass of the lightest Higgs boson is provided in the supersymmetric standard model with multi-Higgs doublets, up to two-loop order. Relatively large corrections are expected from the experimentally unconstrained extra Yukawa couplings. We calculate it including the two-loop leading-log contributions as a function of the scale $\Lambda$, below which the theory remains perturbative. Even for $\Lambda=10^{4}$ GeV, we obtain the upper bound of 140 GeV, which is heavier than that of the MSSM by 10 GeV.
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