344 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Soongsil UniversityKR29 papers
- Korea UniversityKR8 papers
- University of Notre DameUS8 papers
- Yonsei UniversityKR8 papers
- Korea Institute for Advanced StudyKR7 papers
- National Astronomical Observatory of JapanJP7 papers
- The University of TokyoJP7 papers
- Chung Yuan Christian UniversityTW5 papers
- Inha UniversityKR5 papers
- Kyungpook National UniversityKR5 papers
- Advanced Science Research CenterJP4 papers
- Japan Atomic Energy AgencyJP4 papers
9 papers · 1 filter
Big Bang nucleosynthesis in a weakly non-ideal plasma
Dukjae Jang, Youngshin Kwon, Kyujin Kwak +1
We propose a correction of the standard Big Bang nucleosynthesis (BBN) scenario to resolve the primordial lithium problem by considering a possibility that the primordial plasma ca…
Constraints on modified Gauss-Bonnet gravity during big bang nucleosynthesis
Motohiko Kusakabe, Seoktae Koh, K. S. Kim +1
The modified gravity is considered to be one of possible explanations of the accelerated expansions of the present and the early universe. We study effects of the modified gravity…
Corrected constraints on big bang nucleosynthesis in a modified gravity model of
Motohiko Kusakabe, Seoktae Koh, K. S. Kim +1
Big bang nucleosynthesis in a modified gravity model of is investigated. The only free parameter of the model is a power-law index . We find cosmological solut…
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…
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…
7Be charge exchange between 7Be3+ ion and exotic long-lived negatively charged massive particle in big bang nucleosynthesis
Motohiko Kusakabe, K. S. Kim, Myung-Ki Cheoun +2
The existence of an exotic long-lived negatively charged massive particle, i.e., X-, during big bang nucleosynthesis can affect primordial light element abundances. Especially, the…
A Big-Bang Nucleosynthesis Limit on the Neutral Fermion Decays into Neutrinos
Motohiko Kusakabe, A. B. Balantekin, Toshitaka Kajino +1
Using the primordial helium abundance, an upper limit to the magnetic moments for Dirac neutrinos had been provided by imposing restrictions on the number of the additional helicit…