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- W2954798178 abstract "Coupled dark matter-dark energy scenarios are modeled via a dimensionless parameter $xi$, which controls the strength of their interaction. While this coupling is commonly assumed to be constant, there is no underlying physical law or symmetry that forbids a time-dependent $xi$ parameter. The most general and complete interacting scenarios between the two dark sectors should therefore allow for such a possibility, and it is the main purpose of this study to constrain two possible and well-motivated coupled cosmologies by means of the most recent and accurate early and late-time universe observations. We find that CMB data alone prefers $xi(z) >0$ and therefore a smaller amount of dark matter, alleviating some crucial and well-known cosmological data tensions. An objective assessment of the Bayesian evidence for the coupled models explored here shows no particular preference for the presence of a dynamical dark sector coupling." @default.
- W2954798178 created "2019-07-12" @default.
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- W2954798178 creator A5042584133 @default.
- W2954798178 creator A5049472017 @default.
- W2954798178 date "2019-10-07" @default.
- W2954798178 modified "2023-10-16" @default.
- W2954798178 title "Dark sectors with dynamical coupling" @default.
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- W2954798178 doi "https://doi.org/10.1103/physrevd.100.083509" @default.
- W2954798178 hasPublicationYear "2019" @default.
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