Cornering Extended Starobinsky Inflation with CMB and SKA

Abstract

Starobinsky inflation is an attractive, fundamental model to explain the Planck measurements, and its higher-order extension may allow us to probe quantum gravity effects. We show that future CMB data combined with the 21cm intensity map from SKA will meaningfully probe such an extended Starobinsky model. A combined analysis will provide a precise measurement and intriguing insight into inflationary dynamics, even accounting for correlations with astrophysical parameters.

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Cited by in corpus (10)

• The $R^2$-Higgs inflation: $R^3$ contribution and preheating after ACT and SPT data
• Optimal, fast, and robust inference of reionization-era cosmology with the 21cmPIE-INN
• Stability investigations of isotropic and anisotropic exponential inflation in the Starobinsky-Bel-Robinson gravity
• SKATR: A Self-Supervised Summary Transformer for SKA
• Baryogenesis in $R^2$-Higgs Inflation: the Gravitational Connection
• Observational Constraints on Extended Starobinsky and Weyl Gravity Model of Inflation
• Stage IV CMB forecasts for warm inflation
• Stability investigations of de Sitter inflationary solutions in power-law extensions of the Starobinsky model
• Inflation in light of ACT/SPT: A new perspective from Weyl gravity
• Echoes of $R^3$ modification and Goldstone preheating in the CMB-BAO landscape