Standard Big-Bang Nucleosynthesis after Planck
  Primordial or Big Bang nucleosynthesis (BBN) is one of the three historical
strong evidences for the Big-Bang model together with the expansion of the
Universe and the Cosmic Microwave Background radiation (CMB). The recent
results by the Planck mission have slightly changed the estimate of the
baryonic density Omega_b, compared to the previous WMAP value. This article
updates the BBN predictions for the light elements using the new value of
Omega_b determined by Planck, as well as an improvement of the nuclear network
and new spectroscopic observations. While there is no major modification, the
error bars of the primordial D/H abundance (2.67+/-0.09) x 10^{-5} are narrower
and there is a slight lowering of the primordial Li/H abundance
(4.89^+0.41_-0.39) x 10^{-10}. However, this last value is still ~3 times
larger than its observed spectroscopic abundance in halo stars of the Galaxy.
Primordial Helium abundance is now determined to be Y_p = 0.2463+/-0.0003.
