Big bang nucleosynthesis: an accurate determination of light element yields

摘要

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 He-4, D and Li-7 have been numerically obtained via a new updated Version of the standard BBN code. In particular the theoretical uncertainty on He-4 is reduced to the order of 0.1%. (C) 2000 Elsevier Science B.V. All rights reserved. [References: 61]