Phys Rev Lett. 2024 Dec 20;133(25):251003. doi: 10.1103/PhysRevLett.133.251003.
ABSTRACT
We investigate the implications of the baryon acoustic oscillations measurement released by the Dark Energy Spectroscopic Instrument for interacting dark energy (IDE) models characterized by an energy-momentum flow from dark matter to dark energy. By combining Planck-2018 and Dark Energy Spectroscopic Instrument data, we observe a preference for interactions, leading to a nonvanishing interaction rate ξ=-0.32_{-0.14}^{+0.18}, which results in a present-day expansion rate H_{0}=70.8_{-1.7}^{+1.4} km/s/Mpc, reducing the tension with the value provided by the SH0ES Collaboration to less than ∼1.3σ. The preference for interactions remains robust when including measurements of the expansion rate H(z) obtained from the relative ages of massive, early-time, and passively evolving galaxies, as well as when considering distance moduli measurements from Type Ia supernovae sourced from the Pantheon-plus catalog using the SH0ES Cepheid host distances as calibrators. Overall, the IDE framework provides an equally good, or better, explanation of both high- and low-redshift background observations compared to the lambda cold dark matter model, while also yielding higher H_{0} values that align more closely with the local distance ladder estimates. However, a limitation of the IDE model is that it predicts lower Ω_{m} and higher σ_{8} values, which may not be fully consistent with large-scale structure data at the perturbation level.
PMID:39752687 | DOI:10.1103/PhysRevLett.133.251003
