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

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.

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), Article 123526. https://doi.org/10.1103/physrevd.101.123526

• Journal Article Type: Article
• Acceptance Date: Jun 11, 2020
• Online Publication Date: Jun 23, 2020
• Publication Date: Jun 23, 2020
• Deposit Date: Jun 23, 2020
• Publicly Available Date: Jun 24, 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
• DOI: https://doi.org/10.1103/physrevd.101.123526
• Keywords: Physics and Astronomy (miscellaneous)
• Public URL: https://nottingham-repository.worktribe.com/output/4705074
• Publisher URL: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.101.123526