Neutrinos and Big Bang Nucleosynthesis
arXiv:hep-ph/0203164
Abstract
The role of neutrinos in big bang nucleosynthesis is discussed. The bounds on the number of neutrino families, neutrino degeneracy, parameters of neutrino oscillations are presented. A model of chemically inhomogeneous, while energetically smooth, universe created by inhomogeneous cosmological neutrino asymmetry is described. Nucleosynthesis limits on production of right-handed neutrinos are considered.
8 pages; Invited talk at the Workshop "Fermi and Astrophysics", Pescara, Italy, October 3-6, 2001