Abstract
Recent measurements of the primeval deuterium abundance and improved nuclear input to big-bang nucleosynthesis (BBN) precisely peg the baryon density, \( {\Omega_B}{h^2} = 0.0189\pm 0.0019 \). The uncertainty is due to that in the deuterium abundance and input nuclear data, in the ratio of about 2 to 1. The tight constraint sets the stage for a direct comparison with current and planned measurements of the cosmic microwave background anisotropics, and with it, a cosmological test at the level of 5%.
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Burles, S. (2001). Big Bang Nucleosynthesis in the Precision Era. In: Klapdor-Kleingrothaus, H.V. (eds) Dark Matter in Astro- and Particle Physics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-56643-1_20
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DOI: https://doi.org/10.1007/978-3-642-56643-1_20
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