Journal article

Natural leptogenesis and neutrino masses with two Higgs doublets

Jackson D Clarke, Robert Foot, Raymond R Volkas

PHYSICAL REVIEW D | AMER PHYSICAL SOC | Published : 2015

Abstract

The minimal Type I seesaw model cannot explain the observed neutrino masses and the baryon asymmetry of the Universe via hierarchical thermal leptogenesis without ceding naturalness. We show that this conclusion can be avoided by adding a second Higgs doublet with tanβ 4. The models considered naturally accommodate a standard model-like Higgs boson and predict TeV-scale scalar states and low- to intermediate-scale hierarchical leptogenesis with 103 GeV MN1 108 GeV.