Conveners
Primodial Black Holes
- John Miller (University of Oxford)
Minuscule primordial black holes produced just after inflation can serve as ``time capsules" bringing back energy from the past to a later epoch when they evaporate. As these black holes behave like matter, while the rest of the Universe content behaves like radiation, the mass fraction of these black holes, that is tiny at formation, becomes significant later. If sufficiently small, these...
We argue that if in the next few years LIGO-Virgo-KAGRA interferometers would not detect a sufficient number of events involving light black holes, i.e. with masses smaller than 1.5 solar mass, this would be an unambiguous proof that the primordial black holes in the asteroid mass range are NOT present in the dark matter halo of the Galaxy.
The formation of Primordial black holes is naturally enhanced during the quark-hadron phase transition, because of the softening of the equation of state: at a scale between 1 and 3 solar masses, the threshold is reduced of about 10% with a corresponding abundance of primordial black significantly increased by more than 100 times. We show that a sub-population of primordial black black holes...