Speaker
Dr
Marco Hufnagel
(ULB)
Description
We propose a novel mechanism for the production of dark matter (DM) from a thermal bath, based on the idea that DM particles $\chi$ can transform heat bath particles $\psi$: $\chi \psi \rightarrow \chi \chi$. For a small initial abundance of $\chi$ this leads to an exponential growth of the DM number density, in close analogy to other familiar exponential growth processes in nature. We demonstrate that this mechanism complements freeze-in and freeze-out production in a generic way, opening new parameter space to explain the observed DM abundance, and we discuss observational prospects for such scenarios.
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Primary authors
Dr
Marco Hufnagel
(ULB)
Dr
Kai Schmidt-Hoberg
(DESY)
Dr
Torsten Bringmann
(Oslo University)
Dr
Frederik Depta
(T (Phenomenology))
Dr
Joshua Ruderman
