Constraints on α-attractor inflation and reheating

Abstract

We investigate a constraint on reheating followed by alpha-attractor-type inflation (the E-model and T-model) from an observation of the spectral index n_s. When the energy density of the universe is dominated by an energy component with the cosmic equation-of-state parameter w_{re} during reheating, its e-folding number N_{re} and the reheating temperature T_{re} are bounded depending on w_{re}. When the reheating epoch consists of two phases, where the energy density of the universe is dominated by uniform inflaton field oscillations in the first phase and by relativistic non-thermalised particles in the second phase, we find a constraint on the e-folding number of the first oscillation phase, N_{sc}, depending the parameters of the inflaton potential. For the simplest perturbative reheating scenario, we find the lower bound for a coupling constant of inflaton decay in the E-model and T-model depending on the model parameters. We also find a constraint on the $\alpha$ parameter, α\simgt 0.01, for the T-model and E-model when we assume a broad resonance reheating scenario.

16 pages, 6 figures, Physical Review D in press

References in corpus (8)

• The Standard Model Higgs boson as the inflaton
• Reheating in Inflationary Cosmology: Theory and Applications
• Nonperturbative Dynamics Of Reheating After Inflation: A Review
• The Unity of Cosmological Attractors
• Reheating constraints to inflationary models
• Reheating predictions in single field inflation
• Single-field $\alpha$-attractors
• What can the CMB tell about the microphysics of cosmic reheating?

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