Big bang nucleosynthesis: an accurate determination of light element yields Original Research Article

We report the results of a new accurate evaluation of light nuclei yields in primordial nucleosynthesis. All radiative effects, finite nucleon mass, thermal and plasma corrections are included in the proton to neutron conversion rates. The relic densities of 4He, D and 7Li have been numerically obtained via a new updated version of the standard BBN code. In particular the theoretical uncertainty on 4He is reduced to the order of 0.1%.