Higgs Cosmology and Dark Matter

Higgs vacuum stability has important consequences for cosmology. In particular, we argue that if the Higgs vacuum is metastable, then the dark matter cannot contain a single black hole of mass less than $10^{15}{\rm g}$ in our entire past light cone. In addition to being the destroyer microscopic black holes, it may be possible that Higgs vacuum decay is a source of primordial black holes during inflation.
Comment: 5 pages, 4 figures. Talk presented at 2nd World Summit: Exploring the Dark Side of the Universe, June 2018, University of Antilles, Guadeloupe