77 citations · 302 across the 10 of their papers we have counts for
10 papers
Big-bang nucleosynthesis with a long-lived CHAMP including He4 spallation process
Toshifumi Jittoh, Kazunori Kohri, Masafumi Koike +4
We propose helium-4 spallation processes induced by long-lived stau in supersymmetric standard models, and investigate an impact of the processes on light elements abundances. We s…
Big-bang nucleosynthesis with a long-lived charged massive particle including He spallation processes
Toshifumi Jittoh, Kazunori Kohri, Masafumi Koike +4
We propose helium-4 spallation processes induced by long-lived stau in supersymmetric standard models, and investigate an impact of the processes on light elements abundances. We s…
Stau relic density at the Big-Bang nucleosynthesis era consistent with the abundance of the light element nuclei in the coannihilation scenario
Toshifumi Jittoh, Kazunori Kohri, Masafumi Koike +3
We calculate the relic density of stau at the beginning of the Big-Bang Nucleosynthesis (BBN) era in the coannihilation scenario of minimal supersymmetric standard model (MSSM). In…
Model building by coset space dimensional reduction in eight-dimensions
Toshifumi Jittoh, Masafumi Koike, Takaaki Nomura +2
We investigate gauge-Higgs unification models in eight-dimensional spacetime where extra-dimensional space has the structure of a four-dimensional compact coset space. The combinat…
Model building by coset space dimensional reduction in ten-dimensions with direct product gauge symmetry
Toshifumi Jittoh, Masafumi Koike, Takaaki Nomura +2
We investigate ten-dimensional gauge theories whose extra six-dimensional space is a compact coset space, , and gauge group is a direct product of two Lie groups. We list up c…
Big-bang nucleosynthesis and the relic abundance of dark matter in a stau-neutralino coannihilation scenario
Toshifumi Jittoh, Kazunori Kohri, Masafumi Koike +3
A scenario of the Big-Bang Nucleosynthesis is analyzed within the Minimal Supersymmetric Standard Model which is consistent with a stau-neutralino coannihilation scenario to explai…