Dark Matter and Leptogenesis from Gravitational Production

Abstract

Since the gravitational interaction is universal, any particle that ever existed, if kinematically accessible, has to be produced through her. We explore the possibility that dark matter is generated purely from gravitational scatterings together with heavy Majorana right-handed neutrinos that are long-lived. Their late decay could inject significant entropy into the thermal bath, diluting both the dark matter abundance and the cosmic baryon asymmetry, thereby imposing various constraints on the reheating dynamics. Additionally to the entropy injection, long-lived right-handed neutrinos could also be responsible for generating the baryon asymmetry through leptogenesis, and hence establish some nontrivial relations between the dark matter and the right-handed properties, and the reheating dynamics

14+5 pages, 6 figures. V2 matches version accepted in JCAP

References in corpus (19)

• The Dawn of FIMP Dark Matter: A Review of Models and Constraints
• The Sphaleron Rate in the Minimal Standard Model
• Gravitational Production of Dark Matter during Reheating
• Leptogenesis in the Universe
• Enhancement of the Dark Matter Abundance Before Reheating: Applications to Gravitino Dark Matter
• Gravitational Effects on Inflaton Decay
• On Thermal Gravitational Contribution to Particle Production and Dark Matter
• How warm are non-thermal relics? Lyman-$\alpha$ bounds on out-of-equilibrium dark matter
• Dark Matter in the Time of Primordial Black Holes
• Gravitational dark matter production: primordial black holes and UV freeze-in
• Bounds on warm dark matter from Schwarzschild primordial black holes
• Effects of reheating on leptogenesis
• Non-thermal leptogenesis and UV freeze-in of dark matter: impact of inflationary reheating
• Gravity-Mediated Dark Matter Annihilation in the Randall-Sundrum Model
• Natural Seesaw and Leptogenesis from Hybrid of High-Scale Type I and TeV-Scale Inverse
• FIMP Dark Matter in Clockwork/Linear Dilaton Extra-Dimensions
• Non-thermal leptogenesis and baryon asymmetry in different neutrino mass models
• Gravitational Dark Matter and Primordial Black Holes
• Gravitational SIMPs

Cited by in corpus (10)

• Gravitational portals in the early Universe
• Rescuing High-Scale Leptogenesis using Primordial Black Holes
• WIMPs, FIMPs, and Inflaton phenomenology via reheating, CMB and $\Delta N_{eff}$
• Gravity as a Portal to Reheating, Leptogenesis and Dark Matter
• Ultraviolet Freeze-in with a Time-dependent Inflaton Decay
• Freeze-in from Preheating
• Cogenesis of Baryon Asymmetry and Gravitational Dark Matter from Primordial Black Holes
• Thermal and nonthermal dark matters with gravitational neutrino reheating
• Non-thermal WIMPy Baryogenesis with Primordial Black Hole
• Gravitational SIMPs