Solving the Primordial Lithium Anomaly through a Geometrically Bounded Expansion Rate
Year: 2026
Type: preprint
Abstract: The standard cosmological model accurately predicts the primordial abundance of deuterium but overestimates lithium-7 by a factor of three. We present a resolution to this anomaly derived from the \textit{Vi Gravitatis} (VG) theoretical framework. By treating the cosmic expansion as a dynamically bounded process within an inviscid spatial medium, we derive a maximum cosmic temperature Tmax associated with a nonsingular bounce. The resulting analytical expansion rate, HVG(T)=HΛCDM(T)1−T/Tmax, naturally suppresses H(z) by ≈10% during the critical window of beryllium-7 production (T≈0.1 MeV), while rapidly converging to the standard rate at the deuterium freeze-out (T≈0.01 MeV). This geometric mechanism solves the lithium problem without breaking the strict observational constraints on primordial deuterium.
Author: Vinuesa Guerrero, Benito
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7222879758
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