Speaker
Francesco Costa
Description
When the Dark Matter (DM) mass is higher than the maximal temperature of the thermal bath, DM can produced via the freeze-in mechanism with coupling as high as O(1). This leads to an observationally attractive scenario compared to the standard freeze-in couplings that are O(10^−10). In fact, it can be probed by direct detection experiments and at LHC.
We display this mechanism in the scalar DM case. We then present a UV-completed framework where the maximal SM temperature coincides with or is approximately the reheating temperature. We exemplify this in the case of the inflaton primarily decaying into feebly interacting right-handed neutrinos.
