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Challenging the stability of light millicharged dark matter

Jaeckel, Joerg; Schenk, Sebastian

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Authors

Joerg Jaeckel

Sebastian Schenk



Abstract

We investigate the cosmological stability of light bosonic dark matter carrying a tiny electric charge. In the wavelike regime of high occupation numbers, annihilation into gauge bosons can be drastically enhanced by parametric resonance. The millicharged particle can either be minimally coupled to photons, or its electromagnetic interaction can be mediated via kinetic mixing with a massless hidden photon. In the case of a direct coupling, current observational constraints on the millicharge are stronger than those arising from parametric resonance. For the (theoretically preferred) case of kinetic mixing, large regions of parameter space are affected by the parametric resonance, leading at least to a fragmentation of the dark matter field, if not its outright destruction.

Citation

Jaeckel, J., & Schenk, S. (2021). Challenging the stability of light millicharged dark matter. Physical Review D, 103(10), Article 103523. https://doi.org/10.1103/physrevd.103.103523

Journal Article Type Article
Acceptance Date Apr 20, 2021
Online Publication Date May 17, 2021
Publication Date 2021
Deposit Date Sep 14, 2021
Publicly Available Date Sep 14, 2021
Journal Physical Review D
Print ISSN 2470-0010
Electronic ISSN 2470-0029
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 103
Issue 10
Article Number 103523
DOI https://doi.org/10.1103/physrevd.103.103523

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

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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