Cosmological constraints on late-Universe decaying dark matter as a solution to the H0 tension

It has been suggested that late-Universe dark matter decays can alleviate the tension between measurements of H0 in the local Universe and its value inferred from cosmic microwave background fluctuations. It has been suggested that decaying dark matter can potentially account for this discrepancy as...

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Bibliographic Details
Published in:Physical review. D 2021-02, Vol.103 (4)
Main Authors: Clark, Steven J, Vattis, Kyriakos, Koushiappas, Savvas M
Format: Article
Language:English
Subjects:
Anisotropy
Big Bang theory
Cosmic microwave background
Dark energy
Dark matter
Decay
Expanding universe theory
Flux density
Local group (astronomy)
Multipoles
Universe
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Summary:It has been suggested that late-Universe dark matter decays can alleviate the tension between measurements of H0 in the local Universe and its value inferred from cosmic microwave background fluctuations. It has been suggested that decaying dark matter can potentially account for this discrepancy as it reshuffles the energy density between matter and radiation and as a result allows dark energy to become dominant at earlier times. In this work, we show that the low multipole amplitude of the cosmic microwave background anisotropy power spectrum severely constrains the feasibility of late-time decays as a solution to the H0 tension.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.103.043014