Resolution of the Cosmological Lithium Problem via SV0 Early Universe Dynamics
Year: 2026
Type: preprint
Abstract: The Cosmological Lithium Problem—the factor of ~3 discrepancy between the primordial ⁷Li abundance predicted by Standard Big Bang Nucleosynthesis (BBN) and that observed in metal-poor stars—remains a significant challenge to the standard cosmological model. In this paper (Paper XXVI of the SV0 series), we present a natural resolution within the Signed-Volume (SV0) framework. We demonstrate that the SV0 exchange law modifies the Hubble expansion rate H(z) during the BBN epoch. This modification alters the freeze-out temperature of the neutron-to-proton ratio and the time available for ⁷Be to decay into ⁷Li. By incorporating the SV0 dynamics into the standard BBN network, we show that the predicted primordial ⁷Li abundance is reduced by a factor of 2.5 to 3, perfectly aligning with observations, while the abundances of Deuterium and Helium-4 remain consistent with observational constraints.
Author: Sandaruwan, M. Uditha
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7225637544
Cites:
Cited by:
Related to: