Andrew Cheek
Primordial black hole evaporation and dark matter production. I. Solely Hawking radiation
Cheek, Andrew; Heurtier, Lucien; Perez-Gonzalez, Yuber F.; Turner, Jessica
Authors
Dr Lucien Heurtier lucien.heurtier@durham.ac.uk
Academic Visitor
Yuber F. Perez-Gonzalez
Dr Jessica Turner jessica.turner@durham.ac.uk
Associate Professor
Abstract
Hawking evaporation of black holes in the early Universe is expected to copiously produce all kinds of particles, regardless of their charges under the Standard Model gauge group. For this reason, any fundamental particle, known or otherwise, could be produced during the black hole lifetime. This certainly includes dark matter (DM) particles. This paper improves upon previous calculations of DM production from primordial black holes (PBH) by consistently including the greybody factors, and by meticulously tracking a system of coupled Boltzmann equations. We show that the initial PBH densities required to produce the observed relic abundance depend strongly on the DM spin, varying in about ∼2 orders of magnitude between a spin-2 and a scalar DM in the case of nonrotating PBHs. For Kerr PBHs, we have found that the expected enhancement in the production of bosons reduces the initial fraction needed to explain the measurements. We further consider indirect production of DM by assuming the existence of additional and unstable degrees of freedom emitted by the evaporation, which later decay into the DM. For a minimal setup where there is only one heavy particle, we find that the final relic abundance can be increased by at most a factor of ∼4 for a scalar heavy state and a Schwarzschild PBH, or by a factor of ∼4.3 for a spin-2 particle in the case of a Kerr PBH.
Citation
Cheek, A., Heurtier, L., Perez-Gonzalez, Y. F., & Turner, J. (2022). Primordial black hole evaporation and dark matter production. I. Solely Hawking radiation. Physical Review D, 105(1), https://doi.org/10.1103/physrevd.105.015022
Journal Article Type | Article |
---|---|
Acceptance Date | Nov 17, 2021 |
Online Publication Date | Jan 21, 2022 |
Publication Date | 2022 |
Deposit Date | Feb 22, 2022 |
Publicly Available Date | Feb 22, 2022 |
Journal | Physical Review D |
Print ISSN | 2470-0010 |
Electronic ISSN | 2470-0029 |
Publisher | American Physical Society |
Peer Reviewed | Peer Reviewed |
Volume | 105 |
Issue | 1 |
DOI | https://doi.org/10.1103/physrevd.105.015022 |
Public URL | https://durham-repository.worktribe.com/output/1214028 |
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Copyright Statement
Published by the American Physical Society under the terms of
the Creative Commons Attribution 4.0 International license.
Further distribution of this work must maintain attribution to
the author(s) and the published article’s title, journal citation,
and DOI. Funded by SCOAP3.
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