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the claim

The amount of Helium-4 produced during Big Bang nucleosynthesis depends primarily on the expansion rate of the Universe.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
3 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that the amount of Helium-4 produced during Big Bang nucleosynthesis depends primarily on the expansion rate of the Universe?

Yes. The amount of Helium-4 produced during Big Bang nucleosynthesis is fundamentally tied to the early expansion rate and weak interaction freeze-out conditions of the Universe.

Verdict: SUPPORTED · 3 sources for, 0 against · Last checked

The analysis

The retrieved papers consistently confirm that standard Big Bang nucleosynthesis predictions depend on parameters like the cosmic expansion rate and weak interaction rates, which dictate the neutron-proton ratio and subsequently the yield of helium-4.

Evidence for · 3
Precision big bang nucleosynthesis with improved Helium-4 predictions
2018
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Pitrou, C., Coc, A., Uzan, J., & Vangioni, E. (2018). Precision big bang nucleosynthesis with improved Helium-4 predictions. doi.org. https://doi.org/10.1016/j.physrep.2018.04.005

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More for · 2
What could an emerging Big Bang Nucleosynthesis discrepancy be hinting at?
2026
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Poulin, V., Froustey, J., Pitrou, C., & Smith, T. L. (2026). What could an emerging Big Bang Nucleosynthesis discrepancy be hinting at?..

Insights for early dark energy with big bang nucleosynthesis
2025
Get citation
Cook, C. & Meyers, J. (2025). Insights for early dark energy with big bang nucleosynthesis. doi.org. https://doi.org/10.1103/hylg-qgmj

What does the evidence say?

The retrieved papers consistently confirm that standard Big Bang nucleosynthesis predictions depend on parameters like the cosmic expansion rate and weak interaction rates, which dictate the neutron-proton ratio and subsequently the yield of helium-4.

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