Hints of Nonminimally Coupled Gravity in DESI 2024 Baryon Acoustic Oscillation Measurements

The cosmic microwave background (CMB) and baryon acoustic oscillations (BAO) are two of the most robust observations in cosmology. The recent BAO measurements from the DESI collaboration have presented, for the first time, inconsistency between BAO and CMB within the standard cosmological model ΛCDM, indicating a preference for dynamical dark energy over a cosmological constant. We analyze the theoretical implication of the DESI BAO observation for dark energy and gravity employing a nonparametric reconstruction approach for both the dark energy equation of state w_{DE}(a) and the effective field theory coefficients. We find that the DESI data can rule out quintessence dark energy by indicating a crossing of…

• UL
  Universiteit Leiden
• NN
  National Natural Science Foundation of China

  Award: 12333001
• MV
  Ministerie van Onderwijs, Cultuur en Wetenschap

  Award: OCENW.XL21.XL21.025 DUSC
• NO
  Nederlandse Organisatie voor Wetenschappelijk Onderzoek

  Awards: 2019/ENW/00678104, OCENW.XL21.XL21.025
• AS
  Agenzia Spaziale Italiana

  Award: 2018-23-HH.0
• IN
  Instituto Nazionale di Fisica Nucleare