400 citations · 1.1k across the 26 of their papers we have counts for
26 papers
Parametric Resonance in Neutrino Oscillation: A Guide to Control the Effects of Inhomogeneous Matter Density
Masafumi Koike, Toshihiko Ota, Masako Saito +1
Effects of the inhomogeneous matter density on the three-generation neutrino oscillation probability are analyzed. Realistic profile of the matter density is expanded into a Fourie…
Big-bang nucleosynthesis through bound-state effects with a long-lived slepton in the NMSSM
Kazunori Kohri, Masafumi Koike, Yasufumi Konishi +5
We show that the Li problems can be solved in the next-to-minimal supersymmetric standard model where the slepton as the next-to-lightest SUSY particle is very long-lived. Such a l…
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…
A new idea to search for charged lepton flavor violation using a muonic atom
Masafumi Koike, Yoshitaka Kuno, Joe Sato +1
We propose a new process of mu(-) e(-) -> e(-) e(-) in a muonic atom for a quest of charged lepton flavor violation. The Coulomb attraction from the nucleus in a heavy muonic atom…
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…