The 3-3-1 model with right-handed neutrinos supplies a natural sub-MeV dark matter candidate as a gravitationally massive pseudo-Goldstone boson whose relic density is set by freeze-in at low reheating temperatures.
$\mbox{SU}(3)_L \otimes \mbox{U}(1)_N$ and $\mbox{SU}(4)_L \otimes \mbox{U}(1)_N$ gauge models with right-handed neutrinos
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abstract
Pisano and Pleitez have introduced an interesting $\mbox{SU}(3)_C \otimes \mbox{SU}(3)_L \otimes \mbox{U}(1)_N$ gauge model which has the property that gauge anomaly cancellation requires the number of generations to be a multiple of 3. We consider generalizing that model to incorporate right-handed neutrinos. We find that there exists a non-trivial generalization of the Pisano-Pleitez model with right-handed neutrinos which is actually simpler than the original model in that symmetry breaking can be achieved with just three $\mbox{SU}(3)_L$ triplets (rather than 3 $\mbox{SU}(3)_L$ triplets and a sextet). We also consider a gauge model based on $\mbox{SU}(3)_C\otimes \mbox{SU}(4)_L \otimes \mbox{U}(1)_N$ symmetry. Both of these new models also have the feature that the anomalies cancel only when the number of generations is divisible by 3.
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Scalar contributions to oblique parameters in the 331RHN model yield an upper limit ω ≲ 10 TeV dominated by the T parameter.
A singlet scalar leptoquark in the 331LHN model can fully account for the muon anomalous magnetic moment discrepancy with mass above 1.8 TeV (or 6 TeV using 2025 data) while obeying LFV constraints and showing suppressed LHC signals.
citing papers explorer
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The 3-3-1 Model: a natural framework for sub-MeV dark matter
The 3-3-1 model with right-handed neutrinos supplies a natural sub-MeV dark matter candidate as a gravitationally massive pseudo-Goldstone boson whose relic density is set by freeze-in at low reheating temperatures.
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Scalar contributions from $331RHN$ minimal model to oblique parameters
Scalar contributions to oblique parameters in the 331RHN model yield an upper limit ω ≲ 10 TeV dominated by the T parameter.
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Probing muon anomaly and lepton flavor violation with scalar leptoquarks in the 331LHN model
A singlet scalar leptoquark in the 331LHN model can fully account for the muon anomalous magnetic moment discrepancy with mass above 1.8 TeV (or 6 TeV using 2025 data) while obeying LFV constraints and showing suppressed LHC signals.