Observational constraints on inflationary models with non-minimally derivative coupling by ACT
Qing Gao, Y. Qian, Yungui Gong, Zhu Yi
Abstract
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 α-attractor and exponential α-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.
Topics & Concepts
PhysicsCoupling (piping)Observational studyDerivative (finance)Inflation (cosmology)Theoretical physicsParticle physicsEconomicsMedicineFinancial economicsEngineeringPathologyMechanical engineeringCosmology and Gravitation TheoriesGeophysics and Gravity MeasurementsSolar and Space Plasma Dynamics