Leptogenesis and low-energy CP violation in a type-II-dominated
  left-right seesaw model
  We consider leptogenesis in a left-right-symmetric seesaw scenario in which
neutrino mass generation and leptogenesis are dominated by the type-II seesaw
term. Motivated by grand unification, we assume that the neutrino Dirac mass
matrix is dominated by a single entry of the order of the top-quark mass, which
leaves the low-energy phases of the lepton mixing matrix as the only sources of
CP violation. Working in a regime where the triplet scalar predominantly decays
into leptons, this results in a predictive scenario based on a minimal number
of parameters. We perform a detailed analysis of the flavored Boltzmann
equations within a revised density matrix framework and demonstrate that the
observed baryon asymmetry can be successfully generated in this simple model.
We point out that the significance of flavor effects is limited, and we discuss
the implications for low-energy observables such as the Dirac CP phase and
neutrinoless double beta decay.
