Speaker
Description
Displaced events at colliders are a promising way, and in a large region of the
parameter space the only way, to test dark matter produced via freeze-in. Typical decay lengths as obtained from relic density calculations are way too large to observe anything in our detectors if the freeze-in production happens in a radiation dominated universe. However, after inflation, the universe gets reheated through the decay of the inflaton during a matter dominated era. If the freeze-in production of dark matter happens (partially) during this era, the typical decay lengths involved can become accessible for current detectors. If the observation of such a displaced event happens, the characteristics of this event might provide hints about the pre-BBN universe.
