Low-energy nuclear fusion experiments systematically exhibit cross sections that exceed predictions based on bare-nucleus potentials. This enhancement is commonly attributed to electron screening, yet the extracted screening energies often exceed values expected from atomic physics, indicating a possible incompleteness in the standard description. In this work, we introduce a geometric extractionmethod within the Superstring–Fabric Spacetime (SFS) framework, in which fusion enhancement is reinterpreted as a manifestation of spacetime microstructure rather than solely as a many-body electronic effect. An effective geometric energy scale, Ugeom, is defined directly from experimentalastrophysical S-factors without introducing adjustable parameters. The method is applied to three representative fusion channels, p + p, D + D, and D + T , using published data. The extracted values display approximate energy-independence within each channel and obey a clear hierarchy, U DTgeom > U DD geom ≫ U pp geom, which mirrors the empirical ordering of fusion probabilities at low energies. These results suggest that part of the low-energy fusion enhancement may reflect an underlying geometric contribution associated with the microstructure of spacetime. The present approach establishes a quantitative bridge between nuclear fusion phenomenology and spacetime geometry, rendering the SFS framework testable against experimental and astrophysical data. Related Works (Superstring–Fabric Spacetime (SFS) Program): Core SFS model formulation (SFS Model):https://doi.org/10.5281/zenodo.17485070 Geometric origin of electromagnetism (SFS Model):https://doi.org/10.5281/zenodo.18182324 Geometric Origin of the Strong Nuclear Force (SFS Model):https://doi.org/10.5281/zenodo.18498802
Karrar Shuhaib (Tue,) studied this question.