Smooth hybrid inflation in light of ACT DR6 data
Nobuchika Okada, Osamu Seto
Abstract
Smooth hybrid inflation is a hybrid inflation model that is free from topological defects and predicts the density perturbation with the spectral index of about 0.97. We show that the prediction on the spectral index is robust regardless the power of nonrenormalizable terms and meets with the latest results reported by Atacama Cosmology Telescope. Viable scenarios for baryogenesis and dark matter are also discussed.
Topics & Concepts
Inflation (cosmology)Spectral indexSpectral densityPhysicsBaryogenesisPerturbation (astronomy)CosmologyStatistical physicsDark matterIndex (typography)Theoretical physicsNon-GaussianityCosmological perturbation theoryEconometricsEconomicsSpectrum (functional analysis)AttractorFine-tuningPower (physics)Perturbation theory (quantum mechanics)Spectral propertiesClassical mechanicsCosmology and Gravitation TheoriesSolar and Space Plasma DynamicsGeophysics and Gravity Measurements