Guardado en:
| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2501.17914 |
| Etiquetas: |
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- We propose a scale-invariant model with the 3-3-1-1 gauge symmetry that features universal seesaw for all fermion masses. The discrete remnant of the gauge group, the matter parity, stabilizes a fermionic dark matter candidate. The scalar sector contains two triplets, the minimum number to break the 3-3-1 symmetry, and two scalar singlets. With the help of additional vector-like quarks, the universal implementation of the see-saw mechanism across all fermion sectors provides a partial explanation for the observed hierarchy of masses for charged leptons, neutrinos, and quarks. We identify the lightest $ P_M $-odd fermion, $ f_\mathrm{d} $, as a viable dark matter candidate. This fermion satisfies the relic density constraint and the spin-independent constraints within the mass range $ 160 \, \textrm{GeV} \lesssim m_{f_\mathrm{d}} \lesssim 520$ GeV . This range depends on the symmetry-breaking scale $ v_χ$ with a lower bound $ v_χ\gtrsim 3.6$ TeV due to LEP bounds on the $ ρ_0 $ parameter. Spin-independent scattering cross-sections for $ f_\mathrm{d} $ align with experimental limits from LZ and PandaX-4T, with some regions of the parameter space nearing the sensitivity of upcoming experiments, such as XLZD and PandaX-xT, which offers promising opportunities for detection.