What question did this study set out to answer?

The study aims to explore how temperature influences lithium production during Big Bang nucleosynthesis.

May 7, 2026Open Access

Temperature-Localized Exponential Sensitivity of Lithium Production in Standard Big Bang Nucleosynthesis

Puntos clave

The study aims to explore how temperature influences lithium production during Big Bang nucleosynthesis.
Introduced a Gaussian deformation of the Gamow exponent for the reaction ³He(α,γ)⁷Be.
Identified a temperature window around T₉ ≈ 0.51 that affects lithium yield.
Utilized AlterBBN and PRyMordial within standard cosmology frameworks.
A ~10% localized enhancement of the Gamow exponent significantly suppresses lithium abundance.
Deuterium and ⁴He levels remain largely unchanged despite the suppression of lithium.
Findings highlight the intrinsic sensitivity directions in the BBN reaction network.

Resumen

This record corresponds to a preprint (not peer-reviewed).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.

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