Meso-tuned WIMPs and Avoided Deconfinement

Michael Nee

Submitted on 14 November 2022


We discuss the production of dark matter with mass of order 10100 TeV and O(1) couplings to the standard model, a scenario we refer to as the `meso-tuned WIMP'. Given the lack of new physics observed at the LHC, indicating we live in a world with some degree of fine-tuning, this scale is a natural scale to expect new particles to appear. However, dark matter with mass in this range and large couplings is difficult to produce with the observed relic abundance via the usual mechanisms. Here we discuss the non-thermal production of dark matter and show that this mechanism can produce the observed dark matter in this mass range, but requires a specific relationship between the dark matter mass and the reheat temperature. It is shown that the avoided deconfinement model removes the dependence on the reheat temperature and predicts a dark matter candidate which can be tested at the Cherenkov Telescope Array and direct detection experiments, offering a natural setting for meso-tuned WIMP dark matter.


Comment: 6 pages, 2 figures

Subject: High Energy Physics - Phenomenology


Bounds on the parameter space for fixed $\lambda_{\rm eff}=1$. The blue shaded region is excluded by direct detction null results. The light green region shows the bounds from CTA assuming the maximum possible Sommerfeld enhancement, $S\sim200$, while the dark green region shows the CTA bounds when Sommerfeld enhancement is negligible. The ratio $x_r$ required to generate the correct relic abundance is $x_r = 27$.