Precision big bang nucleosynthesis with improved Helium-4 predictions

Big-bang Nucleosynthesis Predictions for Precision Cosmology

The determination of the primeval deuterium abundance has opened a precision era in big-bang nucleosynthesis (BBN), making accurate predictions more important than ever before. We present in analytic form new, more precise predictions for the light-element abundances and their error matrix. Using our predictions and the primeval deuterium abundance we infer a baryon density of Bh = 0:020 0:002 ...

Model-independent Predictions of Big Bang Nucleosynthesis

We derive constraints from standard (with Nν = 3) BBN arising solely from two cosmologically produced nuclides, He and Li, from which the extrapolation to primordial abundances is straightforward. The abundances of D and He are at present only inferred from their solar and local interstellar medium values using models of galactic chemical evolution. However, our knowledge of chemical evolution ...

Big-Bang Nucleosynthesis Enters the Precision Era

The last parameter of big-bang nucleosynthesis, the baryon density, is being pinned down by measurements of the deuterium abundance in high-redshift hydrogen clouds. When it is determined, it will fix the primeval light-element abundances. D, He and Li will become “tracers” for the study of Galactic and stellar chemical evolution, and big-bang nucleosynthesis will become an even sharper probe o...

Big Bang Nucleosynthesis

Big Bang Nucleosynthesis: Reprise

Recent observational and theoretical developments concerning the primordial synthesis of the light elements are reviewed, and the implications for dark matter mentioned.