Interacting Dark Energy after DESI Baryon Acoustic Oscillation Measurements

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…

• UO
  University of Sheffield
• EC
  European Cooperation in Science and Technology

  Award: CA21136
• CN
  Conselho Nacional de Desenvolvimento Científico e Tecnológico

  Award: 304306/2022-3
• FD
  Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul

  Award: 23/2551-0000848-3
• SA
  Science and Technology Facilities Council

  Awards: ST/X000621/1, ST/X000621/1