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 ω0ωaCDM model and its extensions with free Σ m and Neff. Using a comprehensive MCMC analysis with a wide range of cosmological datasets including DESI~DR2 BAO and Lyα data, CMB compressed likelihoods, BBN, cosmic chronometers, and multiple Type~Ia supernova compilations, we assess the statistical preference for departures from .
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