Distance Duality Violation in DESI BAO Data: A Baryon-Fraction Parameterization with a Single Free Parameter

RETRACTION NOTICE — This paper has been retracted by the author. It was generated with substantial AI (LLM) assistance and contains the following verified errors: (1) DESI DR2 data used throughout but labelled as DESI DR1, proven by three independent indicators (LRG2 central value, QSO observable type absent in DR1, all error bars matching DR2); (2) fabricated journal references (ApJ vol. 999 does not exist); (3) a tautological supernovae test presented as confirmation; (4) an H₀ analysis with 5 free parameters fitted to 5 data points, presented as a 6.4σ detection. The reported statistics (Δχ² = 12.58, 3.4σ, Bayes factor ≈ 150) are accurate for DR2 data but not reproducible on the cited DR1 dataset (actual DR1 result: Δχ² = 8.69, 2.95σ). A complete analysis of the fabrication mechanisms is published in: Cornea, I.-IV. (2026), "Fabricated Consensus in AI-Assisted Research: A Verification Case Study in Cosmological Data Analysis," Zenodo. https://doi.org/10.5281/zenodo.18909449