%0 Journal Article
%T New tests of dark sector interactions from the full-shape galaxy power spectrum
%A Nunes, R. C.
%A Vagnozzi, S.
%A Kumar, S.
%A Di Valentino, E.
%A Mena, O.
%J Physical Review D
%D 2022
%V 105
%N 12
%I Amer Physical Soc
%@ 2470-0010
%G English
%F Nunes_etal2022
%O WOS:000813312800005
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5269), last updated on Mon, 04 Jul 2022 07:39:03 +0000
%X We explore the role of redshift-space galaxy clustering data in constraining nongravitational interactions between dark energy (DE) and dark matter (DM), for which state-of-the-art limits have so far been obtained from late-time background measurements. We use the joint likelihood for prereconstruction full-shape (FS) galaxy power spectrum and postreconstruction Baryon Acoustic Oscillation (BAO) measurements from the BOSS DR12 sample, alongside Cosmic Microwave Background (CMB) data from Planck: from this dataset combination we infer H0 1/4 68.02+0.49 and the 2?? lower limit ?? > ???0.12, among the strongest limits ever reported on the DM-DE coupling strength ?? for the particular model considered. Contrary to what has been observed for the ??CDM model and simple extensions thereof, we find that the CMB + FS combination returns tighter constraints compared to the CMB + BAO one, suggesting that there is valuable additional information contained in the broadband of the power spectrum. We test this finding by running additional CMB-free analyses and removing sound horizon information, and discuss the important role of the equality scale in setting constraints on DM-DE interactions. Our results reinforce the critical role played by redshift-space galaxy clustering measurements in the epoch of precision cosmology, particularly in relation to tests of nonminimal dark sector extensions of the ??CDM model.
%R 10.1103/PhysRevD.105.123506
%U https://arxiv.org/abs/2203.08093
%U https://doi.org/10.1103/PhysRevD.105.123506
%P 123506-18pp