Constraints on Kähler moduli inflation from reheating

Abstract

We present predictions of the Kähler moduli inflation model for the spectral tilt by parametrising the reheating epoch by an effective equation-of-state parameter and the number of e-foldings of reheating; and taking into account the post-inflationary history of the model. This model has an epoch in which the energy density of the universe is dominated by cold moduli particles. We compare our results with data from the PLANCK mission and find that exotic reheating (with effective equation of state $w_{\mathrm{re}}$ greater than 1/3) is required to match the observations. For canonical reheating case with $w_{\mathrm{re}}=0$, we deduce ${\text{log}}_{10}(T_{\mathrm{re}}/10^3\text{GeV})\simeq 1190(n_s-0.956)$. We also analyse our results in the context of observations being planned for the future and their projected sensitivities.

11 pages, 4 figures, updated with minor changes, PRD accepted version

References in corpus (8)

• Reheating in Inflationary Cosmology: Theory and Applications
• CMB-S4 Science Book, First Edition
• Reheating constraints to inflationary models
• Reheating predictions in single field inflation
• Dark Radiation in LARGE Volume Models
• Inflation and the Scale Dependent Spectral Index: Prospects and Strategies
• Inflationary Constraints on Late Time Modulus Dominated Cosmology
• Low reheating temperatures in monomial and binomial inflationary potentials

Cited by in corpus (1)

• CMB constraints on the inflaton couplings and reheating temperature in $\alpha$-attractor inflation