A model with two inert scalar doublets

Machado, A. C. B.; Pleitez, V.

doi:10.1016/j.aop.2015.10.017

Cited by 18 publications

(25 citation statements)

References 73 publications

(123 reference statements)

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“…Hence, the issue of the number of scalars is added to the generation problem: How many scalars? The interesting possibility is that this number is equal to the number of fermion generations, i.e., three [30]. Although in the context of the SM, the introduction of three doublets is well motivated, e.g., for implementing CP violation [31] and/or dark matter candidates [32], in models with larger gauge symmetries, a given number of scalar multiplets is not necessarily well motivated.…”

Section: Introductionmentioning

confidence: 99%

Dirac neutrinos in an SU(2) left-right symmetric model

2020

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We propose a left-right symmetric model, with the scalar sector consisting of two doublets and several bidoublets, in which neutrinos remain as Dirac fermions in all orders in perturbation theory. Although with only two bidoublets the neutrino masses still need a ne-tuning, this is not the case when a third bidoublet is added. One of the scalar doublets may be inert, since the left-right symmetry forbids it to couple with fermions.

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Section: Introductionmentioning

confidence: 99%

Dirac neutrinos in an SU(2) left-right symmetric model

2020

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“…Here we will extend the model of Ref. [14] by adding three right-handed sterile neutrinos, N 1R transforming as singlet, and N d = (N 2R , N 3R ) transforming as doublets of S 3 , and two real scalar singlets of SU (2) (Y = 0) but doublets of S 3 , ζ d = (ζ 1 , ζ 2 ). See the other quantum numbers in Table I.…”

Section: The Modelmentioning

confidence: 99%

Lepton masses and mixing in a scotogenic model

et al. 2020

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We consider an extension of the standard model with three Higgs doublet model and S3 × Z2 discrete symmetries. Two of the scalar doublets are inert due to the Z2 symmetry. We have calculated all the mass spectra in the scalar and lepton sectors and accommodated the leptonic mixing matrix as well. We also show that the model has scalar and pseudoscalar candidates to dark matter. Constraints on the parameters of the model coming from the decay µ → eγ were considered and we found signals between the current and the upcoming experimental limits, and from that decay we can predict the one-loop µ → eeē channel.

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“…: V,-vol studied in different contexts, both in the quark [37][38][39][40][41][42][43][44][45][46] and lepton sectors [47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64], due to its simplicity and predictivity, as well as in the scalar sector [65][66][67][68][69][70][71][72] where more predictions arise. More recently, there have been also studies of dark matter candidates in models with S 3 symmetry [73][74][75][76][77][78].…”

Section: Introductionmentioning

confidence: 99%

Scalar and gauge sectors in the 3-Higgs Doublet Model under the $$S_3$$ symmetry

2021

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We analyse the Higgs sector of an $$S_3$$ S 3 model with three Higgs doublets and no CP violation. After electroweak breaking there are nine physical Higgs bosons, one of which corresponds to the Standard Model one. We study the scalar and gauge sectors of this model, taking into account the conditions set by the minimisation and stability of the potential. We calculate the masses, trilinear and quartic Higgs-Higgs, and Higgs-gauge couplings. We consider two possible alignment scenarios, where only one of the three neutral scalars has couplings to the gauge bosons and corresponds to the SM Higgs, and whose trilinear and quartic couplings reduce exactly to the SM ones. We also obtain numerically the allowed parameter space for the scalar masses in each of the alignment scenarios. We use the calculated trilinear and quartic couplings to find the analytical structure of the one-loop neutral scalar mass matrix, without fermionic contributions. We show that it is possible to have a compact mass spectrum where the contribution to the oblique parameters might be small. We explore some scenarios for the loop contributions to the neutral scalar masses.

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A model with two inert scalar doublets

Cited by 18 publications

References 73 publications

Dirac neutrinos in an SU(2) left-right symmetric model

Dirac neutrinos in an SU(2) left-right symmetric model

Lepton masses and mixing in a scotogenic model

Scalar and gauge sectors in the 3-Higgs Doublet Model under the $$S_3$$ symmetry

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