782 citations · 4.2k across the 100 of their papers we have counts for
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Galactic Center gamma-ray excess from two-Higgs-doublet-portal dark matter
Nobuchika Okada, Osamu Seto
We consider a simple extension of the type-II two-Higgs-doublet model by introducing a real scalar as a candidate for dark matter in the present Universe. The main annihilation mod…
Phenomenology in supersymmetric neutrinophilic Higgs model with sneutrino dark matter
Ki-Young Choi, Osamu Seto, Chang Sub Shin
We study a supersymmetric neutrinophilic Higgs model with large neutrino Yukawa couplings where neutrinos are Dirac particles and the lightest right-handed (RH) sneutrino is the li…
Axion monodromy inflation with multi-natural modulations
Tetsutaro Higaki, Tatsuo Kobayashi, Osamu Seto +1
We study parameter space in the axion monodromy inflation corrected by dynamically generated terms involving with the axion. The potential has the linear potential with multiple si…
Axion monodromy inflation with sinusoidal corrections
Tatsuo Kobayashi, Osamu Seto, Yuya Yamaguchi
We study the axion monodromy inflation with a non-perturbatively generated sinusoidal term. The potential form is a mixture between the natural inflation and the axion monodromy in…
Beginning of Universe through large field hybrid inflation
Tatsuo Kobayashi, Osamu Seto
Recent detection of -mode polarization induced from tensor perturbations by the BICEP2 experiment implies so-called large field inflation, where an inflaton field takes super-Pl…
X-ray line signal from decaying axino warm dark matter
Ki-Young Choi, Osamu Seto
We consider axino warm dark matter in a supersymmetric axion model with R-parity violation. In this scenario, axino with the mass $m_\axino\simeq 7$ keV can decay into photon and n…