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The three- and four-Higgs couplings in the general two-Higgs-doublet model
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We apply the unitarity bounds and the bounded-from-below (BFB) bounds to the most general scalar potential of the two-Higgs-doublet model (2HDM). We do this in the Higgs basis, i.e. in the basis for the scalar doublets where only one doublet has vacuum expectation value. In this way we obtain bounds on the scalar masses and couplings that are valid for all 2HDMs. We compare those bounds to the analogous bounds that we have obtained for other simple extensions of the Standard Model (SM), namely the 2HDM extended by one scalar singlet and the extension of the SM through two scalar singlets.
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Cited by 2 Pith papers
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Seesaw neutrinos with one right-handed singlet field and a second Higgs doublet
In the one-singlet seesaw plus two-Higgs-doublet model, the neutrino Yukawa couplings can be expressed analytically through the measured neutrino masses, the PMNS matrix, and only two free parameters, phi' and lambda_D.
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Higgs masses and couplings in the general 2HDM with unitarity bounds
In the general 2HDM with unitarity, bounded-from-below, and T parameter constraints, the Higgs triple coupling ranges up to 1.6 times the SM value and can be negative, while the quartic coupling remains positive and r...
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