Alternative Minimal U(1)${}_{\mathrm{B}-\mathrm{L}}$

Abstract

We provide a minimal alternative gauged U(1)${}_{\mathrm{B}-\mathrm{L}}$ model in which three right-handed neutrinos with charges of (5,-4,-4) and only one B-L Higgs field with charge 1 are introduced. Consistent active neutrino masses and mixings can be obtained if the $Z_2$ symmetry on two of the right-handed neutrinos is introduced. It predicts two heavy degenerate right-handed neutrinos, which may realize resonant leptogenesis scenario, and one relatively light sterile neutrino, which is a good dark matter candidate.

12 pages, 1 figure; version to appear in PLB