Determining reheating temperature at colliders with axino or gravitino dark matter

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 and on T _R may also be derived.