ALP-portal majorana dark matter

Abstract

Axion like particles(ALPs) and right handed neutrinos~(RHNs) are two well-motivated dark matter(DM) candidates. However, these two particles have a completely different origin. Axion was proposed to solve the Strong CP problem, whereas RHNs were introduced to explain light neutrino masses through seesaw mechanisms. We study the case of ALP portal RHN DM taking into account existing constraints on ALPs. We consider the leading effective operators mediating interactions between the ALP and SM particles and three RHNs to generate light neutrino masses through type-I seesaw. Further, ALP-RHN neutrino coupling is introduced to generalize the model which is restricted by the relic density and indirect detection constraint.

arXiv comment18 pages, 6 figures, Matched with the published version

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• A Leptonic ALP Portal to the Dark Sector
• Searching for heavy neutral leptons coupled to axion-like particles at the LHC far detectors and SHiP
• ALPs and HNLs at LHC and Muon Colliders: Uncovering New Couplings and Signals
• Relaxing Limits from Big Bang Nucleosynthesis on Heavy Neutral Leptons with Axion-like Particles
• Resonant ALP-Portal Dark Matter Annihilation as a Solution to the $B^{\pm }\to K^{\pm }\nu \bar{\nu }$ Excess
• Axion Portal to Scalar Dark Matter: Unveiling Stabilizing Symmetry Footprints
• Pseudo scalar dark matter in a generic U$(1{)}_X$ model