Primordial Black Holes, Hawking Radiation and the Early Universe

Details Primordial Black Holes, Hawking Radiation and the Early Universe Primordial Black Holes, Hawking Radiation and the Early Universe

2005-03-27

arxiv.org/abs/hep-ph/0503267v1

Mod.Phys.Lett. A20 (2005) 1573-1576

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 Pages

Scientific paper

10.1142/S0217732305017688

The 511 keV gamma emission from the galactic core may originate from a high concentration ($\sim 10^{22}$) of primordial black holes (PBHs) in the core each of whose Hawking radiation includes $\sim 10^{21}$ positrons per second. The PBHs we consider are taken as near the lightest with longevity greater than the age of the universe (mass $\sim 10^{12}$ kg; Schwarzschild radius $\sim 1$ fm). These PBHs contribute only a small fraction of cold dark matter, $\Omega_{PBH} \sim 10^{-8}$. This speculative hypothesis, if confirmed implies the simultaneous discovery of Hawking radiation and an early universe phase transition.

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