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EFT A9 standardizes redshift decomposition protocols for improved measurement accuracy and stability, suggesting new methods for astrophysical analyses.
This record publishes EFT-A9, the “Redshift Decomposition Protocol Family” in the EFT methods-layer protocol library. A9 standardizes an auditable workflow to decompose redshift into an endpoint baseline (TPR, Tension Potential Redshift) and a path-level fine-tuning term (PER, Path Evolution Redshift), and hard-locks three guardrails: achromaticity, non-blur stability, and line-ratio invariance. It provides two canonical use cases (near-neighbor TPR-dominant; cold-spot/sightline PER-sensitive) and aligns to the audit clause Z13/T4
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Guanglin Tu (2026) studied this question.
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