%0 Journal Article
%T Dark sectors with dynamical coupling
%A Yang, W. Q.
%A Mena, O.
%A Pan, S.
%A Di Valentino, E.
%J Physical Review D
%D 2019
%V 100
%N 8
%I Amer Physical Soc
%@ 2470-0010
%G English
%F Yang_etal2019
%O WOS:000489039100003
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4166), last updated on Tue, 22 Oct 2019 17:31:22 +0000
%X Coupled dark matter-dark energy scenarios arc 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 prefer 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.
%R 10.1103/PhysRevD.100.083509
%U https://arxiv.org/abs/1906.11697
%U https://doi.org/10.1103/PhysRevD.100.083509
%P 083509-11pp