Centers & Labs

Chief Scientist Laboratories

Meson Science Laboratory

Chief Scientist: Masahiko Iwasaki (D.Sci.)
Masahiko  Iwasaki(D.Sci.)

We are conducting two different research subjects. One is the hadron physics focusing at the interaction between mesons and nuclei in the “Pioneering Research Cluster”. The major activity is to study K-meson, second lightest meson having strange-quark, property in the nuclear matter using J-PARC. Another is the muon science, muon science researches covering from condensed matters physics to the fundamental science, mostly using RIKEN-RAL muon facility in “Nishina Center for Accelerator Based Science”.

Main Research Field

Mathematical and physical sciences

Related Research Fields

Interdisciplinary science and engineering / Mathematical and physical sciences

Keywords

  • Nuclear Physics
  • Hadron Physics
  • Muon Science

Selected Publications

  1. Y.Sada et al.:
    “Structure near the K-+p+p threshold in the in-flight 3He(K-,Λp)n reaction”
    Prog. Theor. Exp. Phys. (2016) 051D01.
  2. M. Sato, K. Ishida, M. Iwasaki, S. Kanda, Yue Ma, Y. Matsuda, T. Matsuzaki, K. Midorikawa, Y. Oishi, S. Okada, N. Saito, K. Tanaka and S. Wada.:
    "Laser Spectroscopy of Ground State Hyperfine Splitting Energy of Muonic Hydrogen” Proc. 2nd Int. Symp. Science at J-PARC , JPS Conf. Proc. , 025005 (2015)
  3. P. Bakule, O. Sukhorukov, K. Ishida, F.L. Pratt, D. Fleming, T. Momose, Y. Matsuda, and E. Torikai.:
    "First Accurate Experimental Study of Mu Reactivity from a State-Selected Reactant in the Gas Phase: the Mu + H2{1} Reaction Rate at 300 K”
    J. Phys. B (At. Mol. Opt.) 48, 045204 (2015).
  4. T.Hashimoto et al.:
    ”Search for the deeply bound K-pp state from the semi-inclusive forward-neutron spectrum in the in-flight K- reaction on helium-3"
    Prog. Theor. Exp. Phys. (2015) 061D01.
  5. S. Wenner, R. Holmestad, K. Matsuda, K. Nishimura, T. Matsuzaki, D. Tomono, F.L. Pratt, and C.D. Marioara.:
    "Probing Defects in Al-Mg-Si Alloys Using Muon Spin Relaxation"
    Phys. Rev. B 86, 104201-1-7 (2012)+B3:B4
  6. H. Guo, K. Matsuhira, I. Kawasaki, M. Wakeshima, Y. Hinatsu, I. Watanabe, and Z. Xu.:
    “Magnetic Order in Pyrochlore Iridate Nd2Ir2O7 Probed by Muon Spin Relaxation”
    Phys. Rev. B 88, 060441(R)-1-5(2013)
  7. P. Bakule, et al.:
    "Measurement of muonium emission from silica aerogel”
    Prog. Theor. Exp. Phys. 2013, 103C01
  8. K.Agari et al.:
    “The K1.8BR spectrometer system at J-PARC”
    Prog. Theor. Exp. Phys. (2012) 02B011.
  9. S. Wenner, R. Holmestad, K. Matsuda, K. Nishimura, T. Matsuzaki, D. Tomono, F.L. Pratt, and C.D. Marioara.:
    "Probing Defects in Al-Mg-Si Alloys Using Muon Spin Relaxation"
    Phys. Rev. B 86, 104201-1-7 (2012)
  10. F.L. Pratt, P.J. Baker, S.J. Blundell, T. Lancaster, S. Ohira-Kawamura, C. Baines, Y. Shimizu, K. Kanoda, and I. Watanabe.:
    "Magnatic-Field-Induced Quantum-Phase-Transition in the Spin-Liquid Phase of a Frustrated Magnet”
    Nature 471, 612-616 (2011)

Contact Information

Main Research Building 304
Hirosawa 2-1, Wako-shi, Saitama 351-0198, Japan
Tel:+81-(0)48-467-9352
Fax:+81-(0)48-462-4648

Email: advanced_meson [at] riken.jp

Recent Research Results

January 24, 2019: Press Release
Scientists observe a new form of strange matter