231 citations · 2.6k across the 73 of their papers we have counts for
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Two Loop Neutrino Model and Dark Matter Particles with Global Symmetry
Seungwon Baek, Hiroshi Okada, Takashi Toma
We study a two loop induced seesaw model with global symmetry, in which we consider two component dark matter particles. The dark matter properties are investigated to…
Internal Bremsstrahlung Signature of Real Scalar Dark Matter and Consistency with Thermal Relic Density
Takashi Toma
A gamma-ray excess from the galactic center consistent with line emission around 130 GeV was recently found in the Fermi-LAT data. Although the Fermi-LAT Collaboration has not conf…
Gamma-rays Constraint on Higgs Production from Dark Matter Annihilation
Takashi Toma
A gamma line signal in cosmic-ray observation would be found when Higgs is produced at rest or almost rest by DM annihilation because of decay of 126 GeV Higgs into two gamma. This…
New Interpretation of the Recent Result of AMS-02 and Multi-component Decaying Dark Matters with non-Abelian Discrete Flavor Symmetry
Yuji Kajiyama, Hiroshi Okada, Takashi Toma
Recently the AMS-02 experiment has released the data of positron fraction with much small statistical error. Because of the small error, it is no longer easy to fit the data with a…
Multicomponent dark matter particles in a two-loop neutrino model
Yuji Kajiyama, Hiroshi Okada, Takashi Toma
We construct a loop induced seesaw model in a TeV scale theory with gauged U(1)_{B-L} symmetry. Light neutrino masses are generated at two-loop level and right-handed neutrinos als…