Agenda

The particle nature of dark matter is unknown and has been explored through a wide variety of approaches. Intensive searches on so-called weakly interacting massive particles (WIMPs) in the regime of mass m~O(GeV-TeV), which have thermal origin for the relic abundance, have been performed in the last decades and non-detection of the signature provide stringent constraints on such species. 

Regarding these facts, re-consideration of much wider possibilities extending the favored mass region outwards to very light (m<< eV) or very heavy (m>> TeV) directions are required. Detailed considerations of the production mechanisms are crucial for exploring extreme mass dark matter models because existing theoretical models are less predictable than those for WIMPs. Very light/heavy dark matter is also difficult to test with experimental techniques tuned to WIMPs. We need to search for novel signatures especially relying on cosmological and astrophysical probes. 

The purpose of this workshop is to deepen our knowledge by brainstorming discussions on generation mechanisms of superlight and superheavy dark matter particles, along with possibilities for detecting their cosmological and astrophysical signatures by means of multimessenger approaches.