408 citations · 5.6k across the 109 of their papers we have counts for
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Cosmological Baryon Asymmetry and Neutrinos: Baryogenesis via Leptogenesis in Supersymmetric Theories
K. Hamaguchi
Leptogenesis in supersymmetric model is discussed comprehensively and in detail. In the first half, we discuss several leptogenesis mechanisms by the decay of heavy right-handed ne…
Democratic (S)fermions and Lepton Flavor Violation
K. Hamaguchi, Mitsuru Kakizaki, Masahiro Yamaguchi
The democratic approach to account for fermion masses and mixing is known to be successful not only in the quark sector but also in the lepton sector. Here we extend this ansatz to…
Non-thermal Dark Matter from Affleck-Dine Baryogenesis
Masaaki Fujii, K. Hamaguchi
In this talk we discuss the origin and nature of the dark matter in the Affleck-Dine (AD) baryogenesis. The AD baryogenesis via most of the flat directions predict formations of la…
Non-thermal dark matter via Affleck-Dine baryogenesis and its detection possibility
Masaaki Fujii, K. Hamaguchi
The formation and late time decays of Q-balls are generic consequences of the Affleck-Dine (AD) baryogenesis. A substantial amount of the lightest supersymmetry (SUSY) particles (L…
Predictions on the neutrinoless double beta decay from the leptogenesis via the LHu flat direction
Masaaki Fujii, K. Hamaguchi, T. Yanagida
If the baryon asymmetry in the present universe is generated by decays of the flat direction, the observed baryon asymmetry requires the mass of the lightest neutrino to be…
Leptogenesis with Almost Degenerate Majorana Neutrinos
Masaaki Fujii, K. Hamaguchi, T. Yanagida
We investigate the leptogenesis with almost degenerate neutrinos, in the framework of democratic mass matrix, which naturally explains the large mixing angles for neutrino oscillat…