2012/01/31 by Jae Sik Lee, Apostolos Pilaftsis · 1 citation
Physics and Astronomy · #hep-ph
paper · pdf · doi:10.1103/physrevd.86.035004
27 pages, 5 eps figures, to appear in Phys. Rev. D
arxiv created 2012/08/06 · arxiv updated 2015/06/03
We study the Higgs-boson mass spectrum of a classical scale-invariant realization of the two-Higgs-doublet model (SI-2HDM). The classical scale symmetry of the theory is explicitly broken by quantum loop effects due to gauge interactions, Higgs self-couplings and top-quark Yukawa couplings. We determine the allowed parameter space compatible with perturbative unitarity and electroweak precision data. Taking into account the LEP and the recent LHC exclusion limits on a Standard-Model-like Higgs boson HSM, we obtain rather strict constraints on the mass spectrum of the heavy Higgs sector of the SI-2HDM. In particular, if MHSM ∼ 125 GeV, the SI-2HDM strongly favours scenarios, in which at least one of the non-standard neutral Higgs bosons has a mass close to 400 GeV and is generically degenerate with the charged Higgs boson, whilst the third neutral Higgs scalar is lighter than ~ 500 GeV.