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While the astrophysical evidence for the existence of dark matter (DM) in our Universe is overwhelming, the particle nature of DM remains mysterious. Recently, there has been a revival in the idea that the DM may be light particle, with a mass well below the electroweak scale.This renaissance has been driven by a variety of factors. On the one hand, many new experimental ideas for directly detecting some of the most frequently discussed ultralight DM candidates, such as axions and dark photons, have been proposed over the past few years. Experimentalists have kept pace with these new ideas, and new ultralight DM experiments are under development. Moreover, new data will allow us to probe the particle nature of DM in an astrophysical context at previously uncharted scales. These measurements may discover or constrain models of ultralight DM such as fuzzy, warm, or self-interacting DM that predict deviations at small astrophysical scales. The CMB may be yet another important probe.

This workshop aims to bring together theorists studying light and ultralight DM models along with experimentalists and astrophysicists focusing on the signatures of such models. A primary goal of the workshop is to make sure that all of these groups of researches are aware of the progress happening across the field. By bringing experimentalists and theorists together we hope to formulate a road-map towards detecting or ruling out some of the most well-motivated light DM models such as axion models.

The workshop will have talks on Monday - Wednesday, but, participants are invited to stay the whole week, if their schedule permits.