50 citations · 140 across the 9 of their papers we have counts for
7 papers · 1 filter
The PAMELA and Fermi signals from long-lived Kaluza-Klein dark matter
Nobuchika Okada, Toshifumi Yamada
We propose a simple extension of the minimal universal extra dimension (UED)model by introducing a small curvature. The model is formulated as a small anti-de Sitter curvature limi…
Type II Seesaw and the PAMELA/ATIC Signals
Ilia Gogoladze, Nobuchika Okada, Qaisar Shafi
We discuss how the cosmic ray signals reported by the PAMELA and ATIC/PPB-BETS experiments may be understood in a Standard Model (SM) framework supplemented by type II seesaw and a…
Gauss-Bonnet braneworld cosmological effect on relic density of dark matter
Nobuchika Okada, Satomi Okada
In Gauss-Bonnet braneworld cosmology, the Friedmann equation of our four-dimensional universe on 3-brane is modified in a high energy regime (Gauss-Bonnet regime), while the standa…
NMSSM and Seesaw Physics at LHC
Ilia Gogoladze, Nobuchika Okada, Qaisar Shafi
We consider extensions of the next-to-minimal supersymmetric model (NMSSM) in which the observed neutrino masses are described in terms of effective dimension six (or seven) rather…
A simple 5D SO(10) GUT and sparticle masses
Takeshi Fukuyama, Nobuchika Okada
Simple supersymmetric SO(10) GUT in five dimensions is proposed, in which the fifth dimension is compactified on the orbifold with two inequivalent bra…
Realistic Hybrid Inflation in 5D Orbifold SO(10) GUT
Takeshi Fukuyama, Nobuchika Okada, Toshiyuki Osaka
We discuss the smooth hybrid inflation scenario in the context of a simple supersymmetric SO(10) GUT in 5D orbifold. In this GUT model, the SO(10) gauge symmetry is broken down to…