Neutrinos and matter-antimatter asymmetry of the universe

Abstract

Interactions of heavy Majorana neutrinos in the thermal phase of the early universe may be the origin of the cosmological matter-antimatter asymmetry. Successful baryogenesis, independent of initial conditions, is possible for neutrino masses in the range $10^{-3}eV\le m_i\lesssim 0.1$ eV. Remarkably, this mass window is consistent with the evidence for neutrino masses from oscillations.

Comments: 14 pages, 6 figures; Talk at `Neutrino Telescopes', Venice, March 2003