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Precision Big Bang Nucleosynthesis with the New Code PRIMAT

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arxiv 1909.12046 v1 pith:2GDIHTP5 submitted 2019-09-26 astro-ph.CO

Precision Big Bang Nucleosynthesis with the New Code PRIMAT

classification astro-ph.CO
keywords precisionprimatbangcodelevelnucleosynthesisratesreaction
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Precision on primordial abundances, deduced from observations, have now reached the percent level for 4He and deuterium. Precision on big bang nucleosynthesis (BBN) predictions should, hence, reach the same level. The uncertainty on the 4He mass fraction is strongly affected by theoretical uncertainties on the weak reaction rates that interconvert neutrons with protons. All these corrections have been calculated in a self-consistent manner and implemented in a new, and public, Mathematica code PRIMAT, together with an extensive data base of reaction rates. Both can be obtained at http://www2.iap.fr/users/pitrou/primat.htm.

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Cited by 2 Pith papers

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    Deuterium-to-hydrogen measurements leave most electroweak baryogenesis parameter space unconstrained while imposing stronger exclusions on alternative baryogenesis models.