Dark Matter as Record-Silent Curvature: A Law-Level Classification Within the Tier-0 Framework

This paper presents a law-level classification of the dark matter problem within the Tier-0 admissibility framework. Rather than proposing a new particle candidate or modifying gravitational dynamics, it addresses a structural question that is logically prior to ontology: what admissible class of structure can supply the empirically required gravitational curvature while remaining systematically absent from ordinary record-bearing channels.

The analysis argues that the dominant dark component inferred from galactic rotation curves, gravitational lensing, and large-scale structure is best understood as a record-silent curvature contribution. In this classification, the dark component is gravitationally active and stable under admissible re-expression, yet does not generically participate in dissipative processes, thermalization, electromagnetic radiation, or other mechanisms that produce persistent observational records.

This perspective preserves all standard physics anchors. General relativity is left unchanged, no new long-range forces are introduced, and no specific microphysical realization is assumed. Particle and macroscopic dark matter candidates are not refuted, but reorganized: any viable realization must reproduce the structurally record-silent gravitational role identified here.

The framework explains, at the level of lawhood rather than parameter tuning, why gravitational probes such as lensing provide the clearest evidence for dark matter, why dark halos remain extended rather than dissipatively collapsing like baryons, and why decades of non-gravitational detection efforts may fail without contradiction. The result is a conservative, classification-level resolution of the dark matter problem that reframes “darkness” as a sector distinction rather than a consequence of extreme coupling suppression.

This work is complemented by Dark Energy as a Closure Background: A Tier-0 Law-Level Classification (Zenodo DOI: https://doi.org/10.5281/zenodo.18278767), which applies the same Tier-0 admissibility framework to the distinct observational profile of dark energy. While the present paper classifies dark matter as a curvature-active, record-silent contribution that clusters and localizes, the companion work addresses the global, non-clustering closure background associated with cosmic acceleration. Together, the two analyses clarify how different dark-sector phenomena can arise from structurally distinct admissible curvature roles without modifying established gravitational dynamics.