TY  - JOUR
AU  - Nunes, R. C.
AU  - Vagnozzi, S.
AU  - Kumar, S.
AU  - Di Valentino, E.
AU  - Mena, O.
PY  - 2022
DA  - 2022//
TI  - New tests of dark sector interactions from the full-shape galaxy power spectrum
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 123506
EP  - 18pp
VL  - 105
IS  - 12
PB  - Amer Physical Soc
AB  - 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.
SN  - 2470-0010
UR  - https://arxiv.org/abs/2203.08093
UR  - https://doi.org/10.1103/PhysRevD.105.123506
DO  - 10.1103/PhysRevD.105.123506
LA  - English
N1  - WOS:000813312800005
ID  - Nunes_etal2022
ER  -