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Constraints on the cosmic string loop collapse fraction from primordial black holes

James-Turner, Chloe; Weil, Danton P B; Green, Anne M.; Copeland, Edmund J

Authors

Chloe James-Turner

Danton P B Weil

ANNE GREEN anne.green@nottingham.ac.uk
Professor of Physics



Abstract

A small fraction, f , of cosmic string loops can collapse to form Primordial Black Holes (PBHs). Constraints on the abundance of PBHs can therefore be used to constrain f. We update these calculations, taking into account the PBH extended mass function, and find f < 10 −31 (Gµ/c 2) ^−3/2. This is roughly one order of magnitude tighter than previous constraints. The improvement from the tighter constraints on the abundance of PBHs is partly offset by refinements to the theoretical calculation of the cosmic string loop formation rate.

Journal Article Type Article
Publication Date Jun 23, 2020
Journal Physical Review D
Print ISSN 2470-0010
Electronic ISSN 2470-0029
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 101
Issue 12
Article Number 123526
APA6 Citation James-Turner, C., Weil, D. P. B., Green, A. M., & Copeland, E. J. (2020). Constraints on the cosmic string loop collapse fraction from primordial black holes. Physical Review D, 101(12), https://doi.org/10.1103/physrevd.101.123526
DOI https://doi.org/10.1103/physrevd.101.123526
Keywords Physics and Astronomy (miscellaneous)
Publisher URL https://journals.aps.org/prd/abstract/10.1103/PhysRevD.101.123526

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