Nonthermal dark matter in mirage mediation

TL;DR

This paper investigates how nonthermal production from modulus decay in mirage-mediation models can lead to neutralinos becoming the dominant dark matter, challenging the standard thermal relic scenario.

Contribution

It demonstrates that nonthermal production from modulus decay can produce neutralino dark matter in mirage-mediation models, expanding the understanding of dark matter origins.

Findings

Nonthermal neutralinos can account for dark matter in certain parameter regions.

Modulus decay significantly alters the standard thermal relic scenario.

Nonthermal production is viable for explaining dark matter abundance.

Abstract

In mirage-mediation models there exists a modulus field whose mass is O(1000) TeV and its late-decay may significantly change the standard thermal relic scenario of the dark matter. We study nonthermal production of the dark matter directly from the modulus decay, and find that for some parameter regions non-thermally produced neutralinos can become the dark matter.