New reaction rates for improved primordialD/Hcalculation and the cosmic evolution of deuterium

Primordial or big bang nucleosynthesis (BBN) is one of the three historically strong evidences for the big bang model. Standard BBN is now a parameter-free theory, since the baryonic density of the Universe has been deduced with an unprecedented precision from observations of the anisotropies of the cosmic microwave background radiation. There is a good agreement between the primordial abundances of $^{4}\mathrm{He}$, D, $^{3}\mathrm{He}$, and $^{7}\mathrm{Li}$ deduced from observations and from