articlePhysics Letters BJan 23, 2026DIAMOND OA

Dark energy in light of DESI DR1 and Hubble tension

HWHao WangYPYun-Song Piao

University of Chinese Academy of Sciences · Chinese Academy of Sciences · +2 more institutions

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Abstract

Recently, Dark Energy Spectroscopic Instrument (DESI) collaboration based on their first year data has reported a ≳ 3 σ evidence for an evolving dark energy (DE) against the cosmological constant (CC), so the standard ΛCDM model. However, it is necessary to assess the impact of models able to reduce the Hubble tension on the DESI preference for a dynamical equation of state, where w 0 and w a is the parameters of state equation of DE. In this paper, using DESI DR1 BAO measurements combined with Planck CMB and Pantheon Plus dataset, we perform the Monte Carlo Markov Chain (MCMC) analysis for the w 0 w a CDM model with possible pre-recombination resolutions of the Hubble tension. It is found that, although w 0 >…

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Topics & keywords

Topics
Keywords
  • Dark energy
  • Hubble's law
  • Cosmic microwave background
  • Planck
  • Equation of state
  • Cosmology
  • Baryon acoustic oscillations
  • Markov chain Monte Carlo
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