2025/01/29 by Alex G. Dias, Dias, Alex G., Kristjan Kannike +9 · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Scientific Research and Discoveries
paper · pdf · doi:10.48550/arxiv.2501.17914
openalex publication_date 2025/01/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 PM -odd fermion, fd , as a viable dark matter candidate. This fermion satisfies the relic density constraint and the spin-independent constraints within the mass range 160 \textrmGeV \lesssim mfd \lesssim 520 GeV . This range depends on the symmetry-breaking scale vχ with a lower bound vχ\gtrsim 3.6 TeV due to LEP bounds on the ρ0 parameter. Spin-independent scattering cross-sections for fd 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.