Speaker
Stefano Gariazzo
(IFT (CSIC-UAM))
Description
We discuss the phenomenology of neutrino decoupling in the early universe, by summarising the details of the calculation in standard and non-standard scenarios. We quickly present the state-of-the-art calculation of the effective number of neutrino species in the early universe (Neff) in the three-neutrino case, which gives Neff=3.044, and show how the result can change when additional particles (such as sterile neutrinos or decoupled scalar fields) are considered. Implications for Big Bang Nucleosynthesis are also briefly discussed.
Primary author
Stefano Gariazzo
(IFT (CSIC-UAM))
