Fibre Inflation and Reheating

Abstract

We present constraints on the reheating era within the string Fibre Inflation scenario, in terms of the effective equation-of-state parameter of the reheating fluid, $w_{reh}$. The results of the analysis, completely independent on the details of the inflaton physics around the vacuum, illustrate the behavior of the number of $e$-foldings during the reheating stage, $N_{reh}$, and of the final reheating temperature, $T_{reh}$, as functions of the scalar spectral index, $n_s$. We analyze our results with respect to the current bounds given by the PLANCK mission data and to upcoming cosmological experiments. We find that large values of the equation-of-state parameter ($w_{reh}>1/3$) are particularly favored as the scalar spectral index is of the order of $n_s\sim 0.9680$, with a ${\sigma }_{n_s}\sim 0.002$ error. Moreover, we compare the behavior of the general reheating functions $N_{reh}$ and $T_{reh}$ in the Fibre Inflation scenario with that extracted by the class of the $\alpha$-attractor models with $\alpha =2$. We find that the corresponding reheating curves are very similar in the two cases.

Accepted to PRD, 8 pages, 8 figures, references updated, some typos corrected

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Cited by in corpus (17)

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• (P)reheating after minimal Plateau Inflation and constraints from CMB
• On Inflationary Scale, Reheating Scale and Pre-BBN Cosmology with Scalar Fields
• Secondary GWs and PBHs in string inflation: formation and detectability
• Reheating and Dark Radiation after Fibre Inflation
• Fitting string inflation to real cosmological data: the Fibre Inflation case
• Constraining Non-thermal Dark Matter by CMB
• Measuring the Inflaton Coupling in the CMB
• Constraints on Kähler moduli inflation from reheating
• LiteBIRD and CMB-S4 Sensitivities to Reheating in Plateau Models of Inflation
• Confronting Kähler moduli inflation with CMB data
• Energy Density, Temperature and Entropy Dynamics in Perturbative Reheating
• Fibre inflation and precision CMB data
• Variable Inflaton Equation of State and Reheating
• Connecting Cosmic Inflation to Particle Physics with LiteBIRD, CMB-S4, EUCLID and SKA
• A Fake Instability in String Inflation
• Confronting Inflation and Reheating with Observations: Improved Predictions