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Redshift effects in particle production from Kerr primordial black holes

Cheek, Andrew; Heurtier, Lucien; Perez-Gonzalez, Yuber F.; Turner, Jessica

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Authors

Andrew Cheek



Abstract

When rotating primordial black holes evaporate via Hawking radiation, their rotational energy and mass are dissipated with different dynamics. We investigate the effect of these dynamics on the production of dark radiation—in the form of hot gravitons or vector bosons—and noncold dark matter. Although the production of higher spin particles is enhanced while primordial black holes (PBHs) are rotating, we show that the energy density of dark radiation experiences an extra redshift because their emission effectively halts before PBH evaporation completes. We find that taking this effect into account leads to suppression by a factor of O ( 10 ) of Δ N eff for maximally rotating black holes as compared to previous results. Using the solution of the Friedmann and Boltzmann equations to accurately calculate the evolution of linear perturbations, we revisit the warm dark matter constraints for light candidates produced by evaporation and how these limits vary over black hole spins. Due to the interplay of enhanced production and late dilution, we obtain that higher spin particles are most affected by these bounds.

Citation

Cheek, A., Heurtier, L., Perez-Gonzalez, Y. F., & Turner, J. (2022). Redshift effects in particle production from Kerr primordial black holes. Physical Review D, 106(10), https://doi.org/10.1103/physrevd.106.103012

Journal Article Type Article
Publication Date 2022
Deposit Date Mar 27, 2023
Publicly Available Date Mar 27, 2023
Journal Physical Review D
Print ISSN 2470-0010
Electronic ISSN 2470-0029
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 106
Issue 10
DOI https://doi.org/10.1103/physrevd.106.103012

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Copyright Statement
Reprinted with permission from the American Physical Society: Andrew Cheek, Lucien Heurtier, Yuber F. Perez-Gonzalez, and Jessica Turner (2022) Redshift effects in particle production from Kerr primordial black holes. Physical Review D 106, 103012 © (2022) by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.







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