Determining Reheating Temperature at Colliders with Axino or Gravitino Dark Matter

TL;DR

This paper proposes a method to determine the reheating temperature of the universe using collider measurements of axino or gravitino dark matter, linking early universe conditions with particle physics data.

Contribution

It introduces a novel approach to infer the reheating temperature from LHC data within supersymmetric models, connecting cosmology and collider physics.

Findings

Reheating temperature T_R can be constrained by collider data.

Upper bounds on axino or gravitino masses are derived.

Method links early universe conditions with particle physics measurements.

Abstract

After a period of inflationary expansion, the Universe reheated and reached full thermal equilibrium at the reheating temperature T_R. In this work we point out that, in the context of effective low-energy supersymmetric models, LHC measurements may allow one to determine T_R as a function of the mass of the dark matter particle assumed to be either an axino or a gravitino. An upper bound on their mass may also be derived.