Leptogenesis with dirac neutrinos
- Author(s): Dick, K
- Lindner, M
- Ratz, M
- Wright, D
- et al.
Published Web Locationhttps://doi.org/10.1103/physrevlett.84.4039
We describe a "neutrinogenesis" mechanism whereby, in the presence of right-handed neutrinos with sufficiently small pure Dirac masses, (B+L)-violating sphaleron processes create the baryon asymmetry of the Universe, even when B = L = 0 initially. It is shown that the resulting neutrino mass constraints are easily fulfilled by the neutrino masses suggested by current experiments. We present a simple toy model which uses this mechanism to produce the observed baryon asymmetry of the Universe.