A three-loop neutrino mass model with dark matter and baryogenesis

February 5, 2024
3:00pm to 4:30pm

IFT Seminar Room/Red Room

Theoretical Physics, general interest
Shinya Kanemura
Osaka University

IFT Seminar Room/Red Room


In this talk, I would like to discuss a TeV scale model, which
may be able to simultaneously explain neutrino mass, dark matter and baryon
asymmetry, which was originally proposed in Phys. Rev. Lett. 102 (2009)
051805. In this model, Majorana masses of neutrinos are generated via
three-loop diagrams in which additional scalar bosons including the dark
matter candidate and right-handed neutrinos. In this talk, taking into
account the effect of CP violation, we evaluate baryon asymmetry in this
model along with the mechanism of electroweak baryogenesis. The model
contains multiple CP-violating phases. By using destructive interferences
among them, it is compatible with the stringent constraint from the electric
dipole moment measurements to generate the observed baryon asymmetry. We
discuss a benchmark scenario which can explain the three phenomena
simultaneously with satisfying other various available experimental data.
Some phenomenological predictions of the model are also discussed.