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Effect of Finite Nucleon Mass on Primordial Nucleosynthesis

Geza Gyuk·Michael S. Turner
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Abstract

We have modified the standard code for primordial nucleosynthesis to include the effect of finite nucleon mass on the weak-interaction rates as calculated by Seckel \cite{seckel}. We find a small, systematic increase in the $^4$He yield, $ΔY \simeq 0.0057\,Y$, which is insensitive to the value of the baryon-to-photon ratio $η$ and slightly larger than Seckel's estimate. The fractional changes in the abundances of D, $^3$He, and $^7$Li range from 0.08\% to 3\% for $10^{-11}\le η\le 10^{-8}$.

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Geza Gyuk, Michael S. Turner. 1993-07-15. Effect of Finite Nucleon Mass on Primordial Nucleosynthesis. https://arxiv.org/abs/astro-ph/9307025

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