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arXiv · 2411.18973

Testable Flavored TeV-scale Resonant Leptogenesis with MeV-GeV Dark Matter in a Neutrinophilic 2HDM

Peisi Huang·Kairui Zhang
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Abstract

We explore flavored resonant leptogenesis embedded in a neutrinophilic 2HDM. Successful leptogenesis is achieved by the very mildly degenerate two heavier right-handed neutrinos (RHNs), $N_2$ and $N_3$, with mass splitting of only $ΔM_{32}/M_2 \sim \mathcal{O}(0.1\%-1\%)$. The lightest RHN, with MeV-GeV-scale mass, lies below the sphaleron freeze-out temperature and remains stable, serving as a dark matter candidate. The model enables TeV-scale leptogenesis while avoiding the extreme mass degeneracy plagued conventional resonant leptogenesis. Baryon asymmetry, neutrino masses, and potentially the dark matter relic density can be addressed within a unified and experimentally testable framework.

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Peisi Huang, Kairui Zhang. 2025-05-23. Testable Flavored TeV-scale Resonant Leptogenesis with MeV-GeV Dark Matter in a Neutrinophilic 2HDM. https://doi.org/10.1103/b5sk-5f3d

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