RIKEN Nishina Center for Accelerator-Based Science Few-body Systems in Physics Laboratory

Laboratory Director: Emiko Hiyama (D.Sc.)

Japanese Page

Research Summary

In our laboratory, we are applying accurate few-body problem calculational 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

Keywords

Nuclear Physics
Hadron
Few-body problem

Selected Publications

Papers with an asterisk(*) are based on research conducted outside of RIKEN.

1. D. Suenaga, K. Murakami, E. Itou, and K. Iida:
"Probing the hadron mass spectrum in dense two-color QCD with the linear sigma model"
Phys. Rev. D 107, 054001 (2023).
2. E. Hiyama, M. Isaka, T. Doi, and T. Hatsuda:
"Probing the ΞN interaction through inversion of spin-doublets in ΞNαα nuclei"
Phys. Rev. C 106, 064318 (2022).
3. D. Yoshida, Y. Kita, T. Shimazaki, and M. Tachikawa:
"A comprehensive theoretical study of positron binding and annihilation properties of hydrogen bonded binary molecular clusters"
Phys. Chem. Chem. Phys. 24, 26898 (2022).
4. Z. Yang, G.-J. Wang, J.-J. Wu, M. Oka, and S.-L. Zhu:
"Novel coupled channel framework connecting the quark model and lattice QCD for the near-threshold D_s states"
Phys. Rev. Lett. 128, 112001 (2022).
5. Q. Meng, M. Harada, E. Hiyama, A. Hosaka, and M. Oka:
"Doubly heavy tetraquark resonant states"
Phys. Lett. B 824, 136800 (2021).
6. *L. Happ, M. Zimmermann, S.I. Betelu, W.P. Schleich, and M.A. Efremov:
"Universality in a one-dimensional three-body system"
Phys. Rev. A. 100, 012709 (2019).
7. P. Naidon and S. Endo:
"Efimov Physics: a review"
Rep. Prog. Phys. 80, 056001 (2017).
8. P. Naidon, S. Endo, and M. Ueda:
"Microscopic Origin and Universality Classes of the Efimov Three-Body Parameter"
Phys. Rev. Lett. 112, 105301 (2014).
9. E. Hiyama:
"Gaussian expansion method for few-body systems and its applications to atomic and nuclear physics"
Prog. Theor. Exp. Phys. 2012, 01A204 (2012).
10. E. Hiyama:
"Few-Body Aspects of Hypernuclear Physics"
Few-Body Syst. 53, 189 (2012).

Lab Members

Principal investigator

Emiko Hiyama: Laboratory Director

Core members

Pascal Naidon: Senior Research Scientist
Makoto Oka: Senior Visiting Scientist
Nodoka Yamanaka: Contract Researcher
Lucas Happ: Special Postdoctoral Researcher
Ahmad Jafar Arifi: Special Postdoctoral Researcher
Shuhei Ohno: Junior Research Associate
Jinniu Hu: Visiting Scientist
Ying Zhang: Visiting Scientist

Contact Information

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