3 papers
hep-ph2026
Affleck-Dine Leptoflavorgenesis
Kensuke Akita, Koichi Hamaguchi, Maksym Ovchynnikov
We propose a scenario to produce large primordial lepton flavor asymmetries with vanishing total lepton asymmetry, based on the Affleck-Dine mechanism with Q-ball formation. This s…
hep-ph2026
Maximal parameter space of sterile neutrino dark matter with lepton asymmetries
Kensuke Akita, Koichi Hamaguchi, Maksym Ovchynnikov
We delineate the maximal parameter space of sterile neutrino dark matter in the presence of lepton flavor asymmetries. We focus on large flavor asymmetries with vanishing total lep…
hep-ph2025
Insights on the Scale of Leptogenesis from Neutrino Masses and Neutrinoless Double-Beta Decay
Alessandro Granelli, Koichi Hamaguchi, Maura E. Ramirez-Quezada +3
We revisit the thermal leptogenesis scenario in the type-I seesaw framework featuring three heavy Majorana neutrinos with a hierarchical mass spectrum. We focus on low energy obser…