This record corresponds to a preprint (not peer-reviewed). We investigate the temperature-localized exponential sensitivity of lithium production in standard Big Bang nucleosynthesis (BBN). By introducing a Gaussian deformation of the Gamow exponent for the reaction ³He(α,γ)⁷Be, we identify a narrow temperature window around T₉ ≈ 0.51 that dominates the lithium yield. A ~10% localized enhancement of the Gamow exponent significantly suppresses lithium abundance while leaving deuterium and ⁴He largely unaffected. The analysis is performed within standard cosmology using AlterBBN and PRyMordial, and is intended as a diagnostic probe of intrinsic sensitivity directions in the BBN reaction network rather than a specific microscopic model.
T Omori (Tue,) studied this question.