Minimal seesaw model with tri/bi-maximal mixing and leptogenesis
arXiv:hep-ph/0404187 · doi:10.1016/j.physletb.2004.06.104
Abstract
We examine minimal seesaw mechanism in which the masses of light neutrinos are described with tri/bi-maximal mixing in the basis where the charged-lepton Yukawa matrix and heavy Majorana neutrino mass matrix are diagonal. We search for all possible Dirac mass textures which contain at least one zero entry in $3 \times 2$ matrix and evaluate the corresponding lepton asymmetries. We present the baryon asymmetry in terms of a single low energy unknown, a Majorana CP phase to be clued from neutrinoless double beta decay.
10 pages, 4 figures, revtex4, version to appear in Phys. Lett. B