Dark Matter-Driven Low-Scale Leptogenesis via Neutrino Portal

Abstract

We propose a novel framework for low-scale leptogenesis within an extension of the Standard Model (SM) that includes three SU(2) singlet right-handed neutrinos, a singlet charged neutral fermion, and a real scalar field. In this setup, the CP asymmetry arises through a rich interplay of mechanisms, including two-body decays of the lightest right-handed neutrino into leptons and Higgs or into dark-sector particles, as well as multiple 2 -> 2 scattering processes involving visible and dark states. Crucially, the CP-violating phases originate not only from conventional vertex and self-energy corrections but also from novel interference effects mediated by the dark sector, which significantly enrich the sources of asymmetry. A distinctive feature of our model is the direct connection between the dark sector and leptogenesis, providing a unified explanation for both the matter-antimatter asymmetry and DM abundance. This connection leads to enhanced CP violation in neutrino interactions and predicts new dark-sector particles accessible at the LHC.

References in corpus (48)

• A Theory of Dark Matter
• Oscillating neutrinos and mu --> e, gamma
• A History of Dark Matter
• Freeze-In Production of FIMP Dark Matter
• Leptogenesis
• A lower bound on the right-handed neutrino mass from leptogenesis
• Resonant Leptogenesis
• Leptogenesis for Pedestrians
• Towards a complete theory of thermal leptogenesis in the SM and MSSM
• CP violating decays in leptogenesis scenarios
• Towards the Theory of Cosmological Phase Transitions
• Thermally Generated Gauge Singlet Scalars as Self-Interacting Dark Matter
• Electroweak-Scale Resonant Leptogenesis
• Asymmetric Dark Matter from Leptogenesis
• Scalar Multiplet Dark Matter
• UltraViolet Freeze-in
• Search for heavy neutral leptons in decays of $W$ bosons produced in 13 TeV $pp$ collisions using prompt and displaced signatures with the ATLAS detector
• Freeze-In Dark Matter with Displaced Signatures at Colliders
• Neutrino Portals to Dark Matter
• On the nature of the electroweak phase transition
• LHC-friendly minimal freeze-in models
• Multipartite Interacting Scalar Dark Matter in the light of updated LUX data
• Low-Scale Leptogenesis in the Scotogenic Neutrino Mass Model
• TeV scale leptogenesis, inflaton dark matter and neutrino mass in a scotogenic model
• Baryon number asymmetry and dark matter in the neutrino mass model with an inert doublet
• The Little Review on Leptogenesis
• Leptogenesis and dark matter detection in a TeV scale neutrino mass model with inverted mass hierarchy
• Mass bounds for baryogenesis from particle decays and the inert doublet model
• Search for long-lived heavy neutral leptons with displaced vertices in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Enhancing Dark Matter Annihilation into Neutrinos
• Warm and cold fermionic dark matter via freeze-in
• Natural leptogenesis and neutrino masses with two Higgs doublets
• Type-I Seesaw as the Common Origin of Neutrino Mass, Baryon Asymmetry, and the Electroweak Scale
• Fermion Dark Matter with $N_2$ Leptogenesis in Minimal Scotogenic Model
• Light Dark Matter from Leptogenesis
• Search for heavy neutral leptons in $W^{+}\to {\mu }^{+}{\mu }^{\pm }\text{jet}$ decays
• Scalar dark matter and leptogenesis in the minimal scotogenic model
• Dark Matter: Theoretical Perspectives
• Search for heavy Majorana neutrinos in $e^{\pm }{e}^{\pm }$ and $e^{\pm }{\mu }^{\pm }$ final states via WW scattering in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Mechanism for baryogenesis via feebly interacting massive particles
• Conversion-Driven Leptogenesis: A Testable Theory of Dark Matter and Baryogenesis at the Electroweak Scale
• Freeze-in and Freeze-out of Dark Matter with Charged Long-lived Partners
• On the High $T$ Phase Transition in the Gauged $SU(2)$ Higgs Model
• Dark Matter in the Alternative Left Right Model
• Constraining Hot Dark Matter Sub-Species with Weak Lensing and the Cosmic Microwave Background Radiation
• Leptogenesis from a feebly interacting dark matter sector
• Leptogenesis from Dark Matter Coannihilation
• Genesis of baryon and dark matter asymmetries through ultraviolet scattering freeze-in