F-term Inflation and RSII Brane Mode

TL;DR

This paper explores hybrid F-term inflation within the RSII brane-world model, constraining parameters with recent observational data, demonstrating compatibility, and analyzing fermionic preheating effects post-inflation.

Contribution

It provides new constraints on the model parameters using latest data and introduces an analytical approach to fermionic preheating without universe expansion.

Findings

Model parameters constrained by Planck 2018 data

Compatibility established between the model and observations

Analytical calculation of fermionic particle occupation numbers

Abstract

Considering hybrid F-term inflation in RSII model and using the most recent data from Planck 2018 and in comparison with Planck 2015and WMAP 9-year , we can obtain some interesting constraints on main parameters of the model. Also, we attain convenient compatibility between this model and observational data. We show that this setup provides a successful hybrid inflation with high enough Reheating Temperature, T_R, to have a successful thermalization. After inflation, particles are created in the process of preheating. Inflaton field(s) oscillated and fermionic field(s) interacted with it in a non-perturbative regime of parametric resonance. We apply theory of fermionic preheating coupling to the inflaton, without expansion of the universe, to calculate the occupation number of created particles analytically, and some interesting results are achieved.