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Chief Scientist Laboratories High Energy Nuclear Physics Laboratory

Chief Scientist: Takehiko Saito (Ph.D.)

Research Summary

Takehiko  Saito(Ph.D.)

Comprehensive understanding of the interactions among microscopic particles that is essential to understand the building block of the matter. We investigate the hadronic interactions via studying sub-atomic nuclei with strange quark(s), the so called hypernuclei. We are leading the projects for studying hypernuclei with heavy ion beams at the accelerator facilities in Germany and China. We also initiated and lead the project to study hypernuclei by analyzing the nuclear emulsion data with machine learning techniques. We also lead the development of precise neutron imaging techniques at the world best precision by using particle tracking detectors.

Main Research Fields

  • Mathematical & Physical Sciences

Related Research Fields

  • Engineering
  • Informatics
  • Complex Systems
  • Humanities & Social Sciences
  • Interdisciplinary Science & Engineering
  • Particle, Nuclear, Cosmic ray, Astro physics
  • General applied physics

Keywords

  • Nuclear Physics
  • Hadron Physics
  • Detector development
  • Machine learning
  • Development of precise neutron imaging techniques

Selected Publications

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

  • 1. Takehiko R. Saito, Wenbou Dou, Vasyl Drozd, Hiroyuki Ekawa, Samuel Escrig, Yan He, Nasser Kalantar-Nayestanaki, Ayumi Kasagi, Myroslav Kavatsyuk, Enqiang Liu, Yue Ma, Shizu Minami, Abdul Muneem, Manami Nakagawa, Kazuma Nakazawa, Christophe Rappold, Nami Saito, Christoph Scheidenberger, Masato Taki, Yoshiki K. Tanaka, Junya Yoshida, Masahiro Yoshimoto, He Wang, and Xiaohong Zhou.:
    "New directions in hypernuclear physics"
    Nature Reviews Physics (2021). 10.1038/s42254-021-00371-w
  • 2. Takehiko R. Saito, Hiroyuki Ekawa and Manami Nakagawa.:
    "Novel method for producing very-neutron-rich hypernuclei via charge-exchange reactions with heavy ion projectiles"
    European Physical Journal A57 (2021) 159
  • 3. J. Yoshida, H. Ekawa, A. Kasagi, M. Nakagawa, K. Nakazawa, N. Saito, T.R. Saito, M. Taki and M. Yoshimoto.:
    "CNN-based event classification for alpha-decay events in nuclear emulsion"
    Nucl. Instrum. Meth. A989 (2021) 164930
  • 4. *T.R. Saito, C. Rappold, O. Bertini, S. Bianchin, V. Bozkurt, H. Geissel, M. Kavatsyuk, E. Kim, Y. Ma, F. Maas S. Minami, D. Nakajima, C. Nociforo, B. Ozel-Tashenov, J. Pochodzalla, C. Scheidenberger and K. Yoshida.:
    "Summary of the HypHI Phase 0 experiment and future plans with FRS at GSI (FAIR Phase 0)"
    Nucl. Phys. A 954 (2016) 199-212
  • 5. *J. Aysto, K.-H. Behr, J. Benlliure, A. Bracco, P. Egelhof, A. Fomichev, S. Gales, H. Geissel, T. Grahn, L.V. Grigorenko, M.N. Harakeh, R. Hayano, S. Heinz, K. Itahashi, A. Jokinen, N. Kalantar-Nayestanaki, R. Kanungo, H. Lenske, I. Mukha, G. Münzenberg, C. Nociforo, H.J. Ong, S. Pietri, M. Pfutzner, W. Plass, A. Prochazka, S. Purushothaman, T. Saito, C. Scheidenberger, H. Simon, I. Tanihata, S. Terashima, H. Toki, L. Trache, H. Weick, J.S. Winfield, M. Winkler and V. Zamfir.:
    "Experimental program of the Super-FRS Collaboration at FAIR and developments of related instrumentation"
    Nucl. Instrum. Meth. B376 (2016) 111-115
  • 6. *A. Esser, S. Nagao, F. Schulz, P. Achenbach, C. Ayerbe Gayoso, R. Bohm, O. Borodina, D. Bosnar, V. Bozkurt, L. Debenjak, M.O. Distler, I. Friscic, Y. Fujii, T. Gogami, O. Hashimoto, S. Hirose, H. Kanda, M. Kaneta, E. Kim, Y. Kohl, J. Kusaka, A. Margaryan, H. Merkel1, M. Mihovilovic, U. Muuller, S.N. Nakamura, J. Pochodzalla, C. Rappold, J. Reinhold, T.R. Saito, A. Sanchez Lorente, S. Sanchez Majos, B.S. Schlimme, M. Schoth, C. Sfienti, S. Sirca, L. Tang, M. Thiel, K. Tsukada, A. Weber, and K. Yoshida (A1 Collaboration).:
    "Observation of 4H(Lambda) Hyperhydrogen by Decay-Pion Spectroscopy in Electron Scattering"
    Phys. Rev. Lett. 114 (2015) 232501
  • 7. *C. Rappold, T.R. Saito ,O. Bertini, S. Bianchin, V. Bozkurt, E. Kim, M. Kavatsyuk, Y. Ma, F. Maas, S. Minami, D. Nakajima, B. Ozel-Tashenov, K. Yoshida, P. Achenbach, S. Ajimura, T. Aumann, C. Ayerbe Gayoso, H.C. Bhang, C. Caesar, S. Erturk, T. Fukuda, B. Gokuzum, E. Guliev, J. Hoffmann, G. Ickert, Z.S. Ketenci, D. Khaneft, M. Kim, S. Kim, K. Koch, N. Kurz, A. Le Fevre, Y. Mizoi, L. Nungesser, W. Ott, J. Pochodzalla, A. Sakaguchi, C.J. Schmidt, M. Sekimoto, H. Simon, T. Takahashi, G.J. Tambave, H. Tamura, W. Trautmann, S. Voltz and C.J. Yoon.:
    "Hypernuclear production cross section in the reaction of 6Li + 12C at 2 A GeV"
    Phys. Lett. B 747 (2015) 129-134
  • 8. *C. Rappold, T.R. Saito, O. Bertini, S. Bianchin, V. Bozkurt, M. Kavatsyuk, E. Kim, Y. Ma, F. Maas, S. Minami, D. Nakajima, B. Ozel-Tashenov and K. Yoshida.:
    "On the measured lifetime of light hypernuclei 3H(Lambda) and 4H(Lambda)"
    Phys. Lett. B 728 (2014) 543-548
  • 9. *C. Rappold, E. Kim, T.R. Saito, O. Bertini, S. Bianchin, V. Bozkurt, M. Kavatsyuk, Y. Ma, F. Maas, S. Minami, D. Nakajima, B. Ozel-Tashenov, K. Yoshida, P. Achenbach, S. Ajimura, T. Aumann, C. Ayerbe Gayoso, H.C. Bhang, C. Caesar, S. Erturk, T. Fukuda, B. Gokuzum, E. Guliev, J. Hoffmann, G. Ickert, Z.S. Ketenci, D. Khaneft, M. Kim, S. Kim, K. Koch, N. Kurz, A. Le Fevre, Y. Mizoi, L. Nungesser, W. Ott, J. Pochodzalla, A. Sakaguchi, C.J. Schmidt, M. Sekimoto, H. Simon, T. Takahashi, G.J. Tambave, H. Tamura, W. Trautmann, S. Voltz and C.J. Yoon.:
    "Search for evidence of 3n(Lambda) by observing d + pi- and t + pi - final states in the reaction of 6Li+12C at 2A GeV"
    Phys. Rev. C 88 Rapid Communication (2013) 041001-1-6(R)
  • 10. *C. Rappold, E. Kim, D. Nakajima, T.R. Saito, O. Bertini, S. Bianchin, V. Bozkurt, M. Kavatsyuk, Y. Ma, F. Maas, S. Minami, B. Ozel-Tashenov, K. Yoshida, P. Achenbach, S. Ajimura, T. Aumann, C. Ayerbe Gayoso, H.C. Bhang, C. Caesar, S. Erturk, T. Fukuda, B. Gokuzum, E. Guliev, T. Hiraiwa, J. Hoffmann, G. Ickert, Z.S. Ketenci, D. Khaneft, M. Kim, S. Kim, K. Koch, N. Kurz, A. Le Fevre, Y. Mizoi, M. Moritsu, T. Nagae, L. Nungesser, A. Okamura, W. Ott, J. Pochodzalla, A. Sakaguchi, M. Sako, C.J. Schmidt, M. Sekimoto, H. Simon, H. Sugimura, T. Takahashi, G.J. Tambave, H. Tamura, W. Trautmann, S. Voltz, N. Yokota and C.J. Yoon.:
    "Hypernuclear spectroscopy of products from 6Li projectiles on a carbon target at 2 A GeV"
    Nucl. Phys. A 913 (2013) 170-184

Annual research report

Lab Members

Principal investigator

Takehiko Saito
Chief Scientist

Core members

Yukiko Kurakata
Assistant
Yoshiki Tanaka
Research Scientist
He Wang
Research Scientist
Yue Ma
Senior Research Scientist
Hiroyuki Ekawa
Special Postdoctoral Researcher
Manami Nakagawa
Postdoctoral Researcher
Junya Yoshida
Visiting Scientist
Abdul Muneem
International Program Associate
Enqiang Liu
International Program Associate
Ayumi Kasagi
Junior Research Associate
Wenbo Dou
Student Trainee
Risa Kobayashi
Administrative Part-time Worker II
Keiko Sudo
Administrative Part-time Worker II
Chiho Harisaki
Administrative Part-time Worker II
Kazuma Nakazawa
Visiting Scientist

Contact Information

Laser Science Laboratory, 112
2-1 Hirosawa, Wako, Saitama 351-0198, Japan
Email: takehiko.saito [at] riken.jp

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