DESI convergence toward an increasing matter-density trend

Determine whether DESI observations converge toward an increasing redshift dependence of the inferred matter-density parameter, [?]Omega_m(z), consistent with the increasing trend reported in earlier observations.

Background

The paper treats the standard cosmological parameter Omega_m as potentially varying with redshift when independently fitted to tomographic observations. Earlier DESI BAO results and other observations had motivated the expectation that Omega_m(z) increases with redshift. The unresolved issue is whether DESI measurements, including Full-Shape modelling, will converge on this same qualitative trend rather than yielding mutually inconsistent or approximately constant inferences.

The question is relevant because a consistent redshift drift across independent observables could indicate missing cosmological physics, whereas disagreement among observables could instead point to survey-specific systematics. The paper presents evidence for an emerging increasing trend in DESI Full-Shape constraints but does not establish convergence across the full DESI data set.