Getting a THUMP from a WIMP

Understand

Producing an acceptable thermal relic abundance of dark matter with masses $\gg 10^2$ TeV is a challenge.

• We propose a novel mechanism where GeV-scale states establish a tiny thermal relic abundance for dark matter, which is later promoted to ultra massive status by a very light scalar.
• We refer to this dark matter as a THermal Ultra Massive Particle (THUMP).
• Direct detection of THUMPs can be naturally expected due to large scattering cross sections mediated by low mass states that couple THUMPs to the Standard Model.