Abstract
If some superpartners were in thermal equilibrium in the early universe, and if the lightest superpartner is a cosmologically stable gravitino, then there is a powerful upper bound on the scale of the superpartner masses. Typically the bound is below tens of TeV, often much lower, and has similar parametrics to the WIMP miracle.
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Hall, L.J., Ruderman, J.T. & Volansky, T. A cosmological upper bound on superpartner masses. J. High Energ. Phys. 2015, 94 (2015). https://doi.org/10.1007/JHEP02(2015)094
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DOI: https://doi.org/10.1007/JHEP02(2015)094