Leptogenesis at the TeV scale

Abstract

We consider a generic model with four gauge singlets which generates successfully the right amount of baryon asymmetry through leptogenesis at the TeV scale. It also reproduces left-handed neutrino masses compatible with present data. In the present work, we perform a study of thermal production mechanisms of the lightest right-handed neutrino $N_1$ responsible for the lepton asymmetry taking into account all dominant processes (decays, $\Delta L=1$ and $\Delta L=2$ scatterings) by solving the full Boltzmann equations.

Comments: 6 pages, 2 eps figures, moriond.sty