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The simplest 3-3-1 model
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abstract
A simple extension of the Standard Model (SM), based on the gauge group $SU(3)_C\otimes SU(3)_L\otimes U(1)_Y$ with $Y$ being the hypercharge, is considered. We show that, by imposing an approximate global $SU(2)_L\times SU(2)_R$ custodial symmetry at the SM energy scale, the $Z-Z'$ mixing is absent at tree level and the value of the $\rho$ parameter can be kept close to one. Tree-level flavor-changing neutral currents are also reduced to three particles, namely $Z'$, a CP-odd Higgs and a CP-even Higgs. The model predicts new leptons with electric charges of $\pm 1/2e$ and new quarks with $\pm 1/6e$ charges as well as new gauge and scalar bosons with $\pm 1/2e$ charges. Electric charge conservation requires that one of them must be stable. Their masses are unfortunately free parameters.
Forward citations
Cited by 2 Pith papers
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Natural neutrino sector in a 331-model with Froggatt-Nielsen mechanism
Adding right-handed neutrinos to the Froggatt-Nielsen 331 model realizes a double seesaw with sub-eV active neutrinos, keV sterile neutrinos, and TeV-scale heavy neutrinos that fits oscillation data in three benchmark points.
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Probing axion in the DFSZ model
With right-handed neutrinos, DFSZ PQ charges depend only on PQ_φ; for m_A≈130 GeV, m_H±≈155 GeV and v_u∼few GeV the trilinear modifier κ_λ lies inside current experimental limits.
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