Triplet Leptogenesis in Left-Right Symmetric Seesaw Models

Understand

We discuss scalar triplet leptogenesis in a specific left-right symmetric seesaw model.

• We show that the Majorana phases that are present in the model can be effectively used to saturate the existing upper limit on the CP-asymmetry of the triplets.
• We solve the relevant Boltzmann equations and analyze the viability of triplet leptogenesis.
• It is known for this kind of scenario that the efficiency of leptogenesis is maximal if there exists a hierarchy between the branching ratios of the triplet decays into leptons and Higgs particles.