Description: This research note presents a critical observational refinement of the Primary Energy (PE) Theory. While initial phenomenological estimates suggested a local saturation limit of ηₘax ≈ 0. 14, a new high-precision analysis of the extragalactic dispersion measure (DM) floor in Fast Radio Bursts (FRBs) constrains the effective cosmological viscosity to a tighter range: ηₑff ≈ 0. 10 ± 0. 02 Key Findings: Observational Evidence: Analysis of localized FRBs reveals a linear dispersion slope of approx. 1000 units, exceeding the standard baryonic limit (~900) by ≈10%. This provides direct evidence for a viscous vacuum contribution. Hubble Tension Resolution: The refined value (η ≈ 0. 10) perfectly matches the ratio between late-universe and early-universe expansion measurements (74/67 ≈ 1. 10). Unified Framework: The note clarifies the distinction between the local saturation limit (η ≈ 0. 14, relevant for high-energy particle decays) and the effective cosmological viscosity (η ≈ 0. 10, relevant for signal propagation over vast distances). Status: Observationally constrained parameter. Experimental verification: Confirmed via FRB Dispersion Floor analysis (included in this document). Related Work: A conceptual overview is provided in: “F11: Conceptual Perspective on the Primary Energy Framework” (https: //doi. org/10. 5281/zenodo. 18436994).
Sergey Yurevich Paygachkin (Sun,) studied this question.