Corpus ID: 235732134

Leptogenesis in Type Ib seesaw models

  title={Leptogenesis in Type Ib seesaw models},
  author={Bowen Fu and Stephen F. King},
We study leptogenesis in three different realisations of the type Ib seesaw mechanism, where the effective masses of the neutrinos are obtained by the spontaneous symmetry breaking of two different Higgs doublets. In the minimal type Ib seesaw model, where two right-handed neutrinos form a Dirac mass, we show that it is impossible to produce the correct baryon asymmetry, even including a pseudo-Dirac mass splitting. In an extended type Ib seesaw model, with a third very heavy Majorana right… 
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