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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.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)
  • 2.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)
  • 3.E. Hiyama and M. Kamimura:
    "Linear correlations between4He trimer and tetramer energies calculated with various realistic4He potentials"
    Physical Review A85, 062505 (2012)
  • 4.C. H. Schmickler, H-W. Hammer, and E. Hiyama,
    "Tetramer bound states in heteronuclear system"
    Physical Review A 95, 052710 (2017)
  • 5.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
  • 6.E. Hiyama and M. Kamimura:
    "Variational calculation of4He tetramer ground and excited states using a realistic pair potential"
    Physical Review A85, 022502 (2012)
  • 7.E. Hiyama:
    "Few-Body Aspect of Hypernuclear Physics"
    Few-Body Systems 53, 189-236 (2012)
  • 8.Philipp Gubler, Kenji Morita and Makoto Oka:
    "Charmonium spectra at finite temperature from QCD sum rules with the maximum entropy method"
    Physical Review Letters 107, 092003 (2011)
  • 9.E. Hiyama, M. Kamimura, Y. Yamamoto, and T. Motoba:
    "Five-body cluster structure of the double-Λ hypernucleus ΛΛ11Be"
    Phys. Rev. Lett. 104, 212502 (2010)
  • 10.E. Hiyama and T. Yamada:
    "Structure of Light Hypernuclei"
    Progress in Particle and Nuclear Physics 63, 339-395 (2009)

Related Links

Lab Members

Principal investigator

Emiko Hiyama

Core members

Yasuhiro Yamaguchi
Special Postdoctoral Researcher
Kadir Utku Can
Special Postdoctoral Researcher
Takuma Yamashita
Special Postdoctoral Researcher
Jehee Lee
Student Trainee

Contact Information

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