A Sequentially-Valid Reanalysis of DESI's Dynamical Dark Energy Signal

arXiv:2607.28918 · astro-ph.CO, stat.ME · Submitted 2026-08-19 · Read on arXiv

Jinyoung Kim, David F. Mota, Andrius Tamosiunas

Two Sigma Investments · University of Oslo · Case Western Reserve University

astro-ph.CO, stat.ME

Submitted: 2026-08-19

Updated: 2026-08-20

Comments: 24 pages, 4 figures. Submitted to JCAP. Code: https://github.com/jinyoungkim927/desi-evalue-paper

Code: https://github.com/jinyoungkim927/desi-evalue-paper

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

Terminology

• Quintessence — 7× in this paper · explained in 2 episodes
• Calibration — 4× in this paper · explained in 7 episodes
• Clustering — 4× in this paper · explained in 2 episodes
• Robustness — 3× in this paper · explained in 5 episodes
• Fisher Information — 2× in this paper · explained in 3 episodes
• Verification — 2× in this paper · explained in 2 episodes
• Benchmark — 1× in this paper · explained in 2 episodes
• Dark Energy Spectroscopic Instrument — 1× in this paper
• Degeneracy — 1× in this paper · explained in 3 episodes
• Gravitational Lensing — 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

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• Did DESI DR2 truly reveal dynamical dark energy?
• DESI and SNe: Dynamical Dark Energy, $\Omega_m$ Tension or Systematics?
• Evolving Dark Energy or Supernovae Systematics?
• Dynamic or Systematic? Bayesian model selection between dark energy and supernova biases
• The role of LRG1 and LRG2's monopole in inferring the DESI 2024 BAO cosmology
• Is Chevallier-Polarski-Linder dark energy a mirage?
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• Assessing the Robustness of the CPL Parametrization to Basis and Prior Variations: Insights from DESI DR2 BAO Data
• BICEP2 I: Detection Of B-mode Polarization at Degree Angular Scales

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