Light Dark Matter from Leptogenesis

Abstract

We consider the implications of a shared production mechanism between the baryon asymmetry of the universe and the relic abundance of dark matter, that does not result in matching asymmetries. We present a simple model within a two sector leptogenesis framework, in which right handed sterile neutrinos decay out of equilibrium to both the Standard Model and the dark sector, generating an asymmetry in one and populating the other. This realization naturally accommodates light dark matter in the keV mass scale and above. Interactions in the dark sector may or may not cause the sector to thermalize, leading to interesting phenomenological implications, including hot, warm or cold thermal relic dark matter, while evading cosmological constraints. Under minimal assumptions the model provides a novel non-thermal production mechanism for sterile neutrino dark matter and predicts indirect detection signatures which may address the unexplained 3.5 keV line observed in various galaxy clusters.

13 pages latex, five figures incorporated

References in corpus (30)

• Secluded WIMP Dark Matter
• Leptogenesis
• Asymmetric Dark Matter
• The Dawn of FIMP Dark Matter: A Review of Models and Constraints
• The WIMPless Miracle: Dark Matter Particles without Weak-scale Masses or Weak Interactions
• A lower bound on the mass of Dark Matter particles
• Asymmetric Dark Matter from Leptogenesis
• Decaying Dark Matter can explain the electron/positron excesses
• Hylogenesis: A Unified Origin for Baryonic Visible Matter and Antibaryonic Dark Matter
• Resonant Dark Forces and Small Scale Structure
• Darkogenesis
• Unbroken B-L Symmetry
• US Cosmic Visions: New Ideas in Dark Matter 2017: Community Report
• Interacting Dark Sector and Precision Cosmology
• A Natural Supersymmetric Model with MeV Dark Matter
• Unified origin of baryons and dark matter
• Constraining DM properties with SPI
• INTEGRAL SPI All-Sky View in Soft Gamma Rays: Study of Point Source and Galactic Diffuse Emissions
• Aidnogenesis via Leptogenesis and Dark Sphalerons
• Strongest model-independent bound on the lifetime of Dark Matter
• Cold keV dark matter from decays and scatterings
• Co-Decaying Dark Matter
• Restrictions on parameters of sterile neutrino dark matter from observations of galaxy clusters
• Hidden Sector Hydrogen as Dark Matter: Small-scale Structure Formation Predictions and the Importance of Hyperfine Interactions
• Soft L_e-L_mu-L_tau flavour symmetry breaking and sterile neutrino keV Dark Matter
• Light Dark Matter from the U(1)_X Sector in the NMSSM with Gauge Mediation
• Light Dark Matter, Naturalness, and the Radiative Origin of the Electroweak Scale
• Sterile neutrinos: direct mixing effects versus induced mass matrix of active neutrinos
• A Simple Testable Model of Baryon Number Violation: Baryogenesis, Dark Matter, Neutron-Antineutron Oscillation and Collider Signals
• Origins of Hidden Sector Dark Matter II: Collider Physics

Cited by in corpus (20)

• Light Dark Matter at Neutrino Experiments
• Self-interacting Dark Matter from Primordial Black Holes
• UV Freeze-in in Starobinsky Inflation
• Boosting Freeze-in through Thermalization
• Impact of high-scale Seesaw and Leptogenesis on inflationary tensor perturbations as detectable gravitational waves
• Dark Higgs Dark Matter
• Dark Matter from Exponential Growth
• FIMP Dark Matter from Leptogenesis in Fast Expanding Universe
• Symmetry origin of Baryon Asymmetry, Dark Matter and Neutrino Mass
• Leptogenesis and Dark Matter from Low Scale Seesaw
• Stealth decaying spin-1 dark matter
• Sterile Neutrino Portal Dark Matter in $\nu$THDM
• Asymmetries in Extended Dark Sectors: A Cogenesis Scenario
• Dark matter and low scale leptogenesis in a flavor symmetric neutrino two Higgs doublet model($\nu$2HDM)
• Sub-GeV Dark Matter Direct Detection with Neutrino Observatories
• Minimal effective theory for leptogenesis, dark matter, and neutrino masses
• Gravitational SIMPs
• Dark Matter-Driven Low-Scale Leptogenesis via Neutrino Portal
• Direct Detection and Cosmological Constraints of Dark Matter with Dark Dipoles
• Cogenesis of visible and dark matter in type-I Dirac seesaw