Dependence on BAO tracer families
Individual run · T-aa0cf4a1525f
Public summary of an internal test, not yet independently validated or published.
Question investigated
Does the preference for evolving dark energy in DES-SN5YR and Union3 persist when the low- and high-redshift BAO groups are excluded?
Test conditions
For each supernova compilation (DES-SN5YR and Union3), the fit is repeated with one BAO group excluded at a time. The groups contain measurements at z = (0.295, 0.51, 0.706); (0.934, 1.321, 1.484, 2.33). The supernova data and comparison criteria are held fixed. The comparison tracks fit quality and the direction of the preference in dark-energy parameters.
Result
The direction of the preference for evolving dark energy persisted after each group was excluded. The result demonstrates internal robustness for the data and groupings examined, without establishing a global detection.
Physical interpretation
Excluding tracer groups reveals where the fit improvement is concentrated. The test does not determine the cause of that concentration.