Gauged B-L Leptogenesis

Abstract

We propose a new leptogenesis scenario in a gauged $B-L$ model with supersymmetry at the TeV energy scale. Instead of relying on the very small Yukawa couplings of the singlet neutrinos $N^c$ to generate the observed baryon asymmetry of the Universe, which requires a very large resonance enhancement, their $B-L$ gauge interactions are invoked. Successful leptogenesis is then possible if a particular scalar bilinear ${\tilde{N}}^c{\tilde{N}}^c$ term is disallowed.

Comments: 4 pages, 2 figures