Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-12-10
J.Phys.Conf.Ser.259:012055,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, 3 figures, presented at PASCOS 2010, the 16th International Symposium on Particles, Strings and Cosmology, to appear
Scientific paper
10.1088/1742-6596/259/1/012055
We consider a Two-Higgs-Doublet Model (2HDM) constrained by the condition that assures cancellation of quadratic divergences up to the leading two-loop order. Regions in the parameter space consistent with existing experimental constraints and with the cancellation condition are determined. The possibility for CP violation in the scalar potential is discussed and regions of \tan_\beta-M_{H^\pm} with substantial amount of CP violation are found. The model allows to ameliorate the little hierarchy problem by lifting the minimal scalar Higgs boson mass and by suppressing the quadratic corrections to scalar masses. The cutoff originating from the naturality arguments is therefore lifted from ~0.6 TeV in the Standard Model to ~2.5 TeV in the 2HDM, depending on the mass of the lightest scalar.
Grzadkowski Bohdan
Osland Per
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