New precise measurement of muonium hyperfine structure interval at J-PARC

Y. Ueno, M. Aoki, Y. Fukao, Y. Higashi, T. Higuchi, H. Iinuma, Y. Ikedo, K. Ishida, T. U. Ito, M. Iwasaki, R. Kadono, O. Kamigaito, S. Kanda, D. Kawall, N. Kawamura, A. Koda, K. M. Kojima, M. K. Kubo, Y. Matsuda, T. MibeY. Miyake, T. Mizutani, K. Nagamine, K. Nishiyama, T. Ogitsu, R. Okubo, N. Saito, K. Sasaki, K. Shimomura, P. Strasser, M. Sugano, M. Tajima, K. S. Tanaka, D. Tomono, H. A. Torii, E. Torikai, A. Toyoda, K. Ueno, A. Yamamoto, M. Yoshida

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


MuSEUM is an international collaboration aiming at a new precise measurement of the muonium hyperfine structure at J-PARC (Japan Proton Accelerator Research Complex). Utilizing its intense pulsed muon beam, we expect a ten-fold improvement for both measurements at high magnetic field and zero magnetic field. We have developed a sophisticated monitoring system, including a beam profile monitor to measure the 3D distribution of muonium atoms to suppress the systematic uncertainty.

Original languageEnglish
Article number14
JournalHyperfine Interactions
Issue number1
Publication statusPublished - 2017 Nov 1


  • Bound-state QED
  • Muonium
  • Spectroscopy

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry


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