Resumo

DIAZ-CRUZ, J.L.  e  ROSADO, A.. Electroweak-Higgs unification in the two Higgs doublet model: masses and couplings of the neutral and charged Higgs bosons. Rev. mex. fis. [online]. 2007, vol.53, n.5, pp.396-406. ISSN 0035-001X.

We obtain the mass spectrum and the Higgs self-couplings of the two Higgs doublet model (THDM) in an alternative unification scenario where the parameters of the Higgs potential λ_i (i = 1, 2, 3, 4, 5) are determined by imposing their unification on the electroweak gauge couplings. An attractive feature of this scenario is the possibility of determining the Higgs boson masses by evolving the from the λ_i electroweak-Higgs unification scale M_GH down to the electroweak scale. The unification condition for the gauge (1, 2) and Higgs couplings is written as 1 = 2 =ƒ(λ_i), where 1 = _Y, and k_Y isthe normalization constant. Two variants for the unification condition are discussed: Scenario I is defined through the linear relation: 1 = 2 = k_H(i) λ_i (M_GH), while Scenario II assumes a quadratic relation = = k_H(i) λ_i (M_GH). In Scenario I, by setting ad hoc -k_H (5) = (4) = (3) = k_H (2) = k_H(1) = 1, taking tan β = 1 and using the standard normalization (k_Y = 5/3), we obtain the following spectrum for the Higgs boson masses: _h°= 109.1 GeV, _H°= 123.2 GeV, _A°= 115.5 GeV, and _H± = 80.3 GeV, with similar results for other normalizations such as k_Y = 3/2 and k_Y = 7/4.

Palavras-chave : Electroweak-Higgs unification; Higgs boson masses and couplings; Two Higgs doublet model.

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