Axion dark matter in a $3-3-1$ model

Abstract

Slightly extending a right-handed neutrino version of the $3-3-1$ model, we show that it is not only possible to solve the strong CP problem but also to give the total dark matter abundance reported by the Planck collaboration. Specifically, we consider the possibility of introducing a $3-3-1$ scalar singlet to implement a gravity stable Peccei-Quinn mechanism in this model. Remarkably, for allowed regions of the parameter space, the arising axions with masses $m_a\approx$ meV can both make up the total dark matter relic density through non-thermal production mechanisms and be very close to the region to be explored by the IAXO helioscope.

21 pages, 4 figures

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• Fermion Mass Hierarchy and Double Seesaw Mechanism in a 3-3-1 Model with an Axion
• On the Higgs spectra of the 3-3-1 model
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• Dynamical Symmetry Breaking and Fermion Mass Hierarchy in the Scale-Invariant 3-3-1 Model
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• Rare Kaon Decay to Missing Energy: Implications of the NA62 Result for a $Z^{\prime }$ Model
• The CP violation and scalar dark matter in a 331 model
• Maximal value for trilinear Higgs coupling in a 3-3-1 EFT
• Brazilian Community Report on Dark Matter
• Dark matter in the scale-invariant 3-3-1-1 model
• Theoretical and Experimental Constraints on ${\mathbb{Z}}_{2n}$ Multi-Component Dark Matter Models