Thermal production of axino Dark Matter

TL;DR

This paper reevaluates the thermal production of axino dark matter, incorporating missed interactions, gluon decay channels, and detailed reheating modeling, resulting in higher predicted axino abundance.

Contribution

It introduces new calculations including previously neglected terms, decay processes, and refined reheating modeling, leading to more accurate axino abundance estimates.

Findings

Axino abundance is a few times larger than earlier estimates.

Inclusion of gluon decay channels significantly impacts production rates.

Refined reheating modeling alters the thermal history calculations.

Abstract

We reconsider thermal production of axinos in the early universe, adding: a) missed terms in the axino interaction; b) production via gluon decays kinematically allowed by thermal masses; c) a precise modeling of reheating. We find an axino abunance a few times larger than previous computations.