Reheating constraints on K\"ahler Moduli Inflation

TL;DR

This paper investigates how reheating constraints impact Kähler Moduli Inflation by analyzing cosmological evolution and translating spectral index constraints into reheating scenario parameters across observable scales.

Contribution

It extends the analysis of reheating constraints from the pivot scale to all observable scales in Kähler Moduli Inflation, considering various parameters and equations of state.

Findings

Reheating constraints can be derived from Planck data within this inflation model.

The maximum number of e-folds varies across different scales.

The analysis includes effects of the equation of state and potential parameters.

Abstract

The end of inflation is connected to the standard cosmological scenario through reheating. During reheating, the inflaton oscillates around the minimum of the potential and thus decays into the daughter particles that populate the Universe at later times. Using cosmological evolution for observable CMB scales from the time of Hubble crossing to the present time, we translate the constraint on the spectral index $n_s$ from Planck data to the constraint on the reheating scenario in the context of K\"ahler Moduli Inflation. In addition, we extend the de-facto analysis generally done only for the pivot scale to all the observable scales which crossed the Hubble radius during inflation. We study how the maximum number of e-folds varies for different scales, and the effect of the equation of state and potential parameters.