The Dark Universe after Reheating in String Inflation

TL;DR

This paper investigates how string inflation models with fibred Calabi-Yau structures influence dark matter and dark radiation production after reheating, considering various physical constraints to predict dark matter properties.

Contribution

It introduces a detailed analysis of dark matter and dark radiation production in fibred Calabi-Yau string inflation models, highlighting the impact of multiple physical constraints.

Findings

Distinct predictions for dark matter nature based on model constraints

Interplay between inflation, reheating, and supersymmetry breaking affects dark sector outcomes

Insights into dark radiation contributions in string inflation scenarios

Abstract

We study the production of dark matter and dark radiation after reheating in string inflation models where the Calabi-Yau has a fibred structure and the visible sector lives on D3 branes. We show how the interplay between different physical constraints from inflation, reheating, supersymmetry breaking and dark radiation, leads to distinct predictions for the nature of dark matter.