Model-independent predictions of big bang nucleosynthesis

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 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 from 4 He and 7 Li : Consistency and Implications

We examine in detail how BBN theory is constrained, and what predictions it can make, when using only the most model-independent observational constraints. We avoid the uncertainties and model-dependencies that necessarily arise when solar neighborhood D and He abundances are used to infer primordial D and He via chemical and stellar evolution models. Instead, we use He and Li, thoroughly exami...

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.