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RIKEN Nishina Center for Accelerator-Based Science Strangeness Nuclear Physics Laboratory

Director: Emiko Hiyama (D.Sci.)

Research Summary

Emiko  Hiyama(D.Sci.)

In our laboratory, we are applying accurate few-body problem calulational method to various fields such as hypernuclear physics, unstable nuclear physics and hadron physics. As a result, we are getting new understanding by solving three- and four-body problem accurately. Especially, we are researching hypernuclear physics. The hypernucleus is composed of a hyperon, neutrons and protons. The research purpose in our laboratory is to understand interaction between hyperon and nucleon in unified way by studying the structure of the hypernuclei from the view points of three- and four-body problems. Recently, we have succeeded in developing our method up to five-body problem.

Main Research Fields

  • Mathematical & Physical Sciences


  • Nuclear Physics
  • Hadron
  • Few-body problem

Selected Publications

  • 1. P. Naidon and D. S. Petrov.:
    "Mixed bubbles in Bose-Bose mixtures"
    Physical Review Letters, 126, 115301 (2021)
  • 2. Q. Meng, E. Hiyama, A. Hosaka, M. Oka, P. Gubler, K. U. Can, T. T. Takahashi, H. S. Zong.:
    "Stable double-heavy tetraquarks: Spectrum and structure"
    Physics Letters B 814 136095(2021)
  • 3. E. Hiyama, K. Sasaki, T. Miyamaoto, T. Doi, T. Hatsuda, Y. Yamamoto, and Th. A.Rijken.:
    "Possible lightest Ξ hypernucleus with Modern ΞN interactions"
    Physical Review Letters 124, 092501 (2020).
  • 4. Kei Iida, Etsuko Itou and Tong-Gyu Lee.:
    "Two-colour QCD phases and the topology at low temperature and high density"
    Journal of High Energy Physics 2001(2020)181
  • 5. T. Fukui, L. De Angelis, Y. Z. Ma, L. Coraggio, A. Gargano, N. Itaco, and F. R. Xu.:
    "Realistic shell-model calculations for p-shell nuclei including contributions of a chiral three-body force",
    Physical Review C 98, 044305 (2018)
  • 6. E. Hiyama, R. Lazauskas, J. Carbonell. and M. Kamimura.:
    "Possibility of generating a 4-neutron resonance with a T=3/2 isospin- 3-neutron force"
    Physical Review C 93, 044004 (2016)
  • 7. H. Togashi, E. Hiyama, Y. Yamamoto, and M. Takano.:
    "Equation of state for neutron stars with hyperon using a variational method"
    Physical Review C 93, 035808 (2016)
  • 8. Masayuki Asakawa, Tetsuo Hatsuda, Etsuko Itou, Masakiyo Kitazawa, Hiroshi Suzuki (FlowQCD Collaboration):
    "Thermodynamics of SU(3) Gauge Theory from Gradient Flow"
    Physical Review D 90, 011501 (2014), 5pages, [Erratum: Physical Review D 92, 059902 (2015)]
  • 9. E. Hiyama.:
    "Gaussian expansion method for few-body systems and its applications to atomic and nuclear physics"
    Progress of Theoretical and Experimental Physics, Special Issue, Volume 2012, Issue 1, 01A204
  • 10. E. Hiyama.:
    "Few-Body Aspect of Hypernuclear Physics"
    Few-Body Systems 53, 189-236 (2012)

Related Links

Lab Members

Principal investigator

Emiko Hiyama

Core members

Pascal Naidon
Senior Research Scientist
Etsuko Itou
Contract Researcher
Tokuro Fukui
Special Postdoctoral Researcher
Makoto Oka
Senior Visiting Scientist
Masaaki Tokieda
Visiting Scientist
Jinniu Hu
Visiting Scientist
Ying Zhang
Visiting Scientist

Contact Information

2-1 Hirosawa,
Wako, Saitama
351-0198, Japan
Email: hiyama [at] riken.jp