Observational constraints on inflationary models with non-minimally derivative coupling by ACT

Abstract

The most recent data release from the Atacama Cosmology Telescope (ACT) reveals a larger value of the scalar spectral tilt $n_s$, ruling out a broad class of inflationary attractors. In this paper, we consider inflationary models including the power law potential, the hilltop model, the polynomial $\alpha$-attractor and exponential $\alpha -$attractor, with non-minimally derivative coupling in the high friction limit, and show how the models can fit ACT data. We also derive constraints on the model parameters using the latest ACT data.

1 figure, minor changes to match the version published on JCAP

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• Radiative-Corrected Higgs Inflation in Light of the Latest ACT Observations
• Harrison-Zeldovich attractor: From Planck to ACT results
• Induced-Gravity Palatini-Like Higgs Inflation in Supergravity Confronts ACT DR6
• Single-field D-type inflation in the minimal supergravity in light of Planck-ACT-SPT data
• Confronting Inflation and Reheating with Observations: Improved Predictions
• Effect of Moduli Redefinitions on Fibre Inflation
• String-inspired Gauss-Bonnet Gravity Inflation and ACT
• Hamilton-Jacobi analysis of noncanonical inflation in $f(R,T)$ gravity: Constraints from Planck/ACT data, and theoretical bounds
• Constraints on non-canonical chaotic inflation from ACT DR6 and BICEP/Keck data
• Inflationary models in a minimally coupled $f(R,T)$ gravity: Constraints from $Planck$, BICEP/$Keck$, and ACT
• Reconciling the ACT Preference in $f(T)$ Gravity: Inflation and Reheating Constraints
• Mutated hilltop inflation in light of Planck/ACT observations