Is Dark Energy Dynamical in the DESI Era? A Critical Review

Abstract

We investigate whether the recent DESI DR2 measurements provide or not evidences for dynamical dark energy by exploring the $\ddot{I}{‰}_0\ddot{I}{‰}_a$CDM model and its extensions with free $\sum m_{\hat{I}}½$ and $N_{\mathrm{eff}}$. Using a comprehensive MCMC analysis with a wide range of cosmological datasets including DESI~DR2 BAO and Ly$\hat{I}\pm$ data, CMB compressed likelihoods, BBN, cosmic chronometers, and multiple Type~Ia supernova compilations, we assess the statistical preference for departures from $\hat{I}›$CDM.

41 pages, 19 figures, accepted for publication in Physics of the Dark Universe

References in corpus (8)

• Assessing observational constraints on dark energy
• Testing signatures of phantom crossing through full-shape galaxy clustering analysis
• Neutrino mass tension or suppressed growth rate of matter perturbations?
• Measuring neutrino masses with joint JWST and DESI DR2 data
• Constraining deviations from $\hat{I}›$CDM in the Hubble expansion rate
• Probing the H0 Tension with Holographic Dark Energy in Unimodular Gravity: Insights from DESI DR2
• Null energy condition violation and beyond Horndeski physics in light of DESI DR2 data
• Reionization optical depth and CMB-BAO tension in punctuated inflation

Cited by in corpus (12)

• Probing departures from $\hat{I}›$CDM by late-time datasets
• Joint Constraints on Neutrinos and Dynamical Dark Energy in Minimally Modified Gravity
• Measuring neutrino mass in light of ACT DR6 and DESI DR2
• Evidence for evolving dark energy from DESI DR2 BAO and Pantheon${}^{+}$, DES-Dovekie, and Union3
• Dynamical Oscillations in Dark Energy: Joint Constraints on the $w_{sin}$CDM Model from DESI, OHD, and Supernova Samples
• Dark energy, spatial curvature, and star formation efficiency from JWST photometric and spectroscopic high-redshift galaxies
• Anisotropic matter and nonlinear electromagnetics black holes
• Cosmological test of a length-preserving biconnection gravity
• Sound Mode and Scale-Dependent Growth in Two-Fluid Dynamical Dark Energy
• UV-complete and stable Quintom Dark Energy models in the light of DESI DR2
• Constraining Early Dark Energy cosmological models with Big Bang Nucleosynthesis
• No preference for generalized emergent dark energy from current cosmological data