Big Bang Nucleosynthesis: A Critical Review of Primordial Abundance Data

A critical review paper examines the current status of cosmological nucleosynthesis, focusing on the inferred primordial abundances of deuterium, helium-4, and lithium-7. The analysis compares these abundances with the baryon-to-photon ratio determined from cosmic microwave background observations, finding overall concordance within a specific range. The paper discusses constraints on the effective number of neutrino species and other new physics.

Use Cases

• Benchmarking cosmological models based on the inferred primordial abundances of deuterium and helium-4.
• Investigating the lithium-7 abundance problem based on the discrepancy between observed and expected values.
• Constraining the effective number of neutrino species based on combined D, He-4, and CMB data.
• Testing new physics models based on the bounds for the baryon-to-photon ratio and baryon density.

Strengths

• Provides a quantitative range for the baryon-to-photon ratio: η = (5.7-6.7)×10⁻¹⁰ at 95% CL.
• Offers a specific bound on the effective number of neutrino species: N_ν = 3.28 ± 0.28.
• Compares independent determinations of η from primordial abundances and CMB anisotropies.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

paperswithcode

Collection Method

Likely a published academic review paper.