Constraints on Cosmic Strings due to Black Holes Formed from Collapsed Cosmic String Loops

Details Constraints on Cosmic Strings due to Black Holes Formed from Collapsed Cosmic String Loops Constraints on Cosmic Strings due to Black Holes Formed from Collapsed Cosmic String Loops

1993-06-03

arxiv.org/abs/hep-ph/9306221v1

Phys.Rev.D48:2581-2586,1993

Physics

High Energy Physics

High Energy Physics - Phenomenology

(Plain Tex, uses tables.tex -- wrapped lines corrected), 11 pages, FERMILAB-Pub-93/137-A

Scientific paper

10.1103/PhysRevD.48.2581

The cosmological features of primordial black holes formed from collapsed cosmic string loops are studied. Observational restrictions on a population of primordial black holes are used to restrict $f$, the fraction of cosmic string loops which collapse to form black holes, and $\mu$, the cosmic string mass-per-unit-length. Using a realistic model of cosmic strings, we find the strongest restriction on the parameters $f$ and $\mu$ is due to the energy density in $100 MeV$ photons radiated by the black holes. We also find that inert black hole remnants cannot serve as the dark matter. If earlier, crude estimates of $f$ are reliable, our results severely restrict $\mu$, and therefore limit the viability of the cosmic string large-scale structure scenario.

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