62 citations · 1.3k across the 66 of their papers we have counts for
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Cosmological solutions to the Lithium problem: Big-bang nucleosynthesis with photon cooling, -particle decay and a primordial magnetic field
Dai G. Yamazaki, Motohiko Kusakabe, Toshitaka Kajino +2
The Li abundance calculated in BBN with the baryon-to-photon ratio fixed from fits to the CMB power spectrum is inconsistent with the observed lithium abundances on the surface…
General limit on the relation between abundances of D and Li in big bang nucleosynthesis with nucleon injections
Motohiko Kusakabe, Myung-Ki Cheoun, K. S. Kim
The injections of energetic hadrons could have occurred in the early universe by decays of hypothetical long-lived exotic particles. The injections induce the showers of nonthermal…
Chemical separation of primordial Li during structure formation caused by nanogauss magnetic field
Motohiko Kusakabe, Masahiro Kawasaki
During the structure formation, charged and neutral chemical species may have separated from each other at the gravitational contraction in primordial magnetic field (PMF). A gradi…
Effects of Long-lived 10 MeV Scale Sterile Neutrino on Primordial Elemental Abundances and Effective Neutrino Number
Hiroyuki Ishida, Motohiko Kusakabe, Hiroshi Okada
The primordial lithium abundance inferred from observations of metal-poor stars is ~3 times smaller than the theoretical value in standard big bang nucleosynthesis (BBN) model. We…
Revised Big Bang Nucleosynthesis with long-lived negatively charged massive particles: updated recombination rates, primordial 9Be nucleosynthesis, and impact of new 6Li limits
Motohiko Kusakabe, K. S. Kim, Myung-Ki Cheoun +3
We extensively reanalyze effects of a long-lived negatively charged massive particle, X-, on big bang nucleosynthesis (BBN). The BBN model with an X- particle was originally motiva…