David Cyncynates, University of Washington
Tuesday, February 21, 2023 - 3:00pm
Dark photons are excellent dark matter candidates and offer compelling experimental targets. However, recently it has been shown that the simplest production scenarios (e.g. inflationary production and axion-dark photon conversion) lead to the formation of topological defects rather than nonrelativistic dark matter, substantially restricting the viable parameter space. I will first explain how defect formation constrains dark photon production on a model-independent basis. Then I will present a construction that avoids these constraints by delaying production until very late times, re-opening a large part of the experimentally accessible parameter space and offering additional cosmological signatures.