PBH Dark Matter from Ultra-Slow-Roll Inflation in Horndeski Gravity
Analysis
Key Takeaways
- •Investigates Primordial Black Hole (PBH) dark matter within Horndeski gravity.
- •Proposes an ultra-slow-roll phase driven by a cubic Horndeski interaction.
- •Amplifies the curvature power spectrum on small scales, potentially forming asteroid-mass PBHs.
- •PBHs could account for a substantial fraction of dark matter.
- •Predicts potentially observable scalar-induced gravitational-wave signatures.
“The mechanism amplifies the curvature power spectrum on small scales without introducing any feature in the potential, leading to the formation of asteroid-mass PBHs.”