Standard Big-Bang Nucleosynthesis up to CNO with an improved extended nuclear network

Understand

Primordial or Big Bang nucleosynthesis (BBN) is one of the three strong evidences for the Big- Bang model together with the expansion of the Universe and the Cosmic Microwave Background radiation.

• In this study, we improve the standard BBN calculations taking into account new nuclear physics analyses and we enlarge the nuclear network until Sodium.
• This is, in particular, important to evaluate the primitive value of CNO mass fraction that could affect Population III stellar evolution.
• For the first time we list the complete network of more than 400 reactions with references to the origin of the rates, including \approx 270 reaction rates calculated using the TALYS code.