Generating lepton masses and mixings with a heavy vector doublet

Hernández, A. E. Cárcamo; Vignatti, Jonatan; Zerwekh, Alfonso R.

doi:10.1088/1361-6471/ab4499

J. Phys. G: Nucl. Part. Phys.

2019

DOI: 10.1088/1361-6471/ab4499

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Generating lepton masses and mixings with a heavy vector doublet

A. E. Cárcamo Hernández

Jonatan Vignatti

Alfonso R. Zerwekh

Abstract: We construct a viable extension of the SM with a heavy vector in the fundamental SU (2) L representation and nine SM singlet scalar fields, consistent with the current SM fermion mass spectrum and fermionic mixing parameters. The small masses for the active neutrinos are generated from radiative seesaw mechanism at one loop level mediated by the neutral components of the heavy vector as well as by the left handed Majorana neutrinos. We carry out an analysis of the predictions in the lepton sector, where the mo… Show more

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Cited by 10 publications

(1 citation statement)

References 225 publications

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“…There are four solutions for m 1,2 , but they give the same value of m2 i j and the same absolute values of m 1,2,3 thus we only consider in detail the solution in Eqs (26). and(27).…”

mentioning

confidence: 99%

$$U(1)_{B-L}$$ extension of the standard model with $$S_3$$ symmetry

Vien

Long²,

Hernández

2020

Eur. Phys. J. C

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We propose a renormalizable $$B-L$$B-L Standard Model (SM) extension based on $$S_3$$S3 symmetry which successfully accommodates the observed fermion mass spectra and flavor mixing patterns as well as the CP violating phases. The small masses for the light active neutrinos are generated through a type I seesaw mechanism. The obtained physical parameters in the lepton sector are well consistent with the global fit of neutrino oscillations (Esteban et al. in J High Energy Phys 01:106, 2019) for both normal and inverted neutrino mass orderings. The model also predicts effective neutrino mass parameters of $${\langle m_{ee}\rangle }= {1.02\times 10^{-2}}\,{\mathrm {eV}},\, m_{\beta }= {1.25}\times 10^{-2}\,{\mathrm {eV}}$$⟨mee⟩=1.02×10-2eV,mβ=1.25×10-2eV for normal hierarchy (NH) and $${\langle m_{ee}\rangle } ={5.03}\times 10^{-2}\, {\mathrm {eV}},\, m_{\beta } ={5.05}\times 10^{-2}\, {\mathrm {eV}}$$⟨mee⟩=5.03×10-2eV,mβ=5.05×10-2eV for inverted hierarchy (IH) which are all well consistent with the future large and ultra-low background liquid scintillator detectors which has been discussed in Ref. (Zhao et al. in Chin Phys C 41(5):053001, 2017) or the limit of the effective neutrino mass can be reached by the planning of future experiments. The model results are consistent with and successfully accommodate the recent experimental values of the physical observables of the quark sector, including the six quark masses, the quark mixing angles and the CP violating phase in the quark sector.

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“…There are four solutions for m 1,2 , but they give the same value of m2 i j and the same absolute values of m 1,2,3 thus we only consider in detail the solution in Eqs (26). and(27).…”

mentioning

confidence: 99%

$$U(1)_{B-L}$$ extension of the standard model with $$S_3$$ symmetry

Vien

Long²,

Hernández

2020

Eur. Phys. J. C

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Probing left-handed heavy neutral leptons in the Vector Scotogenic Model

Paulo Areyuna,

Zamora-Saa,

Zerwekh

2024

J. High Energ. Phys.

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In this work, we consider an extension to the Standard Model composed by a Massive Vector Doublet under SU(2)L and a Left-handed Heavy Neutral Lepton. We study the production of these exotic leptons with the Same Flavor Opposite Sign standard lepton pair, and jets, considering Drell-Yan and Vector Boson Fusion as independent cases. We find that for the latter, the dilepton angular distribution is different enough from the background to use it as a smoking-gun for our model. Based on this fact, we establish limits on the parameter space considering previous experimental searches in this final state.

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Fermion mass hierarchy and g − 2 anomalies in an extended 3HDM Model

Hernández

Kovalenko

Maniatis³

et al. 2021

J. High Energ. Phys.

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We propose an extension of the three-Higgs-doublet model (3HDM), where the Standard Model (SM) particle content is enlarged by the inclusion of two inert SU2L scalar doublets, three inert and two active electrically neutral gauge singlet scalars, charged vector like fermions and Majorana neutrinos. These additional particles are introduced to generate the SM fermion mass hierarchy from a sequential loop suppression mechanism. In our model the top and exotic fermion masses appear at tree level, whereas the remaining fermions get their masses radiatively. Specifically, bottom, charm, tau and muon masses appear at 1-loop; the masses for the light up, down and strange quarks as well as for the electron at 2-loop and masses for the light active neutrinos at 3-loop. Our model successfully accounts for SM fermion masses and mixings and accommodates the observed Dark Matter relic density, the electron and muon anomalous magnetic moments, as well the constraints arising from charged Lepton Flavor Violating (LFV) processes. The proposed model predicts charged LFV decays within the reach of forthcoming experiments.

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Generating lepton masses and mixings with a heavy vector doublet

Cited by 10 publications

References 225 publications

$$U(1)_{B-L}$$ extension of the standard model with $$S_3$$ symmetry

$$U(1)_{B-L}$$ extension of the standard model with $$S_3$$ symmetry

Probing left-handed heavy neutral leptons in the Vector Scotogenic Model

Fermion mass hierarchy and g − 2 anomalies in an extended 3HDM Model

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