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

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 $\Delta M_{32}/M_2\sim \mathcal{O}(0.1\%-1\%)$. 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.

10 pages with 6 figures; aligned withe the version accpeted in PRD

References in corpus (12)

• Leptogenesis
• The Sphaleron Rate in the Minimal Standard Model
• NuFit-6.0: Updated global analysis of three-flavor neutrino oscillations
• A possible symmetry of the $\nu$MSM
• The Forward Physics Facility: Sites, Experiments, and Physics Potential
• Flavour Covariant Transport Equations: an Application to Resonant Leptogenesis
• Probing Physics Beyond the Standard Model: Limits from BBN and the CMB Independently and Combined
• SENSEI: First Direct-Detection Results on sub-GeV Dark Matter from SENSEI at SNOLAB
• Kadanoff-Baym Approach to Flavour Mixing and Oscillations in Resonant Leptogenesis
• Soft L_e-L_mu-L_tau flavour symmetry breaking and sterile neutrino keV Dark Matter
• On Resonant Leptogenesis
• Prospects for Light Dark Matter Searches at Large-Volume Neutrino Detectors

Cited by in corpus (2)

• WIMP Dark Matter from a Natural Discrete Gauge Symmetry in the Standard Model
• Cosmological Probes of Lepton Parity Freeze-in Dark Matter: $\Delta N_{\mathrm{eff}}$ & Gravitational Waves