Do DESI-DR2 BAO data imply a coupling of dark matter and dark energy?

arXiv:2609.05660 · astro-ph.CO · Submitted 2026-09-04 · Read on arXiv

astro-ph.CO

Submitted: 2026-09-04

Updated: 2026-09-30

Comments: Accepted for publication in Physical Review D. DOI: 10.1103/6kdf-vzq4. 25 pages, 20 figures

DOI: 10.1103/6kdf-vzq4

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Quintessence — 14× in this paper · explained in 2 episodes
• Matter Power Spectrum — 10× in this paper · explained in 2 episodes
• Clustering — 7× in this paper · explained in 2 episodes
• Baryon Acoustic Oscillations — 5× in this paper
• Cosmic Microwave Background — 4× in this paper
• Equation of State (EoS) — 3× in this paper · explained in 4 episodes
• Anti-correlation — 2× in this paper · explained in 3 episodes
• Consistency — 2× in this paper · explained in 3 episodes
• Decoupling — 2× in this paper · explained in 2 episodes
• Hubble Tension — 2× in this paper · explained in 9 episodes
• Abundance — 1× in this paper · explained in 1 episode
• Bayesian Framework — 1× in this paper · explained in 3 episodes
• Bispectrum — 1× in this paper · explained in 3 episodes
• Dark Energy Spectroscopic Instrument — 1× in this paper
• Degeneracy — 1× in this paper · explained in 3 episodes
• Momentum transfer — 1× in this paper · explained in 2 episodes
• Trace — 1× in this paper · explained in 2 episodes
• Weak Lensing — 1× in this paper · explained in 2 episodes
• alpha — 1× in this paper · explained in 1 episode

Sources

• In the Realm of the Hubble tension $-$ a Review of Solutions
• Challenges for $\Lambda$CDM: An update
• Dissecting the $H_0$ and $S_8$ tensions with Planck + BAO + supernova type Ia in multi-parameter cosmologies
• Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
• Quintessence, Cosmic Coincidence, and the Cosmological Constant
• The $H_0$ Olympics: A fair ranking of proposed models
• A combined analysis of the $H_0$ late time direct measurements and the impact on the Dark Energy sector
• H0LiCOW XIII. A 2.4% measurement of $H_{0}$ from lensed quasars: $5.3\sigma$ tension between early and late-Universe probes
• DESI DR2 Results II: Measurements of Baryon Acoustic Oscillations and Cosmological Constraints
• DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
• Extended Dark Energy analysis using DESI DR2 BAO measurements
• Robust Preference for Dynamical Dark Energy in DESI BAO and SN Measurements
• DESI 2024: Reconstructing Dark Energy using Crossing Statistics with DESI DR1 BAO data
• Nonparametric late-time expansion history reconstruction and implications for the Hubble tension in light of recent DESI and type Ia supernovae data
• Reconstructing the dark energy density in light of DESI BAO observations
• Reconstruction of dark energy and late-time cosmic expansion using the Weighted Function Regression method
• Dynamics of dark energy
• Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
• Coupled Quintessence
• Cosmology with Interaction between Phantom Dark Energy and Dark Matter and the Coincidence Problem

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