Black Holes, Nuggets, & Blobs. Oh my!

The past few years have seen a growing interest to explore dark matter candidates that are outside of the standard WIMP / axion paradigms.  A resurgence of macroscopic dark matter candidates have brought with it a mix of whimsical names — primordial black holes, asymmetric dark matter nuggets, and dark blobs — to name a few.  In general the difficulty with macro dark matter is not the observational constraints, which are typically quite sparse and weak, but rather the challenge is finding a well-motivated mechanism for producing gram-sized dark matter objects.  In this talk, I will argue that “dark quark nuggets” are a generic prediction of confining, hidden-sector gauge theories.  I will discuss the phenomenology of these theories, the cosmological production of dark quark nuggets, and their observational probes.