Presice Measurement of Muonium Hyperfine Structure in J-PARC

• Project/Area Number: 26247046
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: SHIMOMURA Koichiro 大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 准教授 (60242103)
• Co-Investigator(Renkei-kenkyūsha): MATSUDA Yasuyuki 東京大学, 総合文化研究科, 准教授 (70321817) ; TORII Horoyuki 東京大学, 総合文化研究科, 助教 (20302838) ; SASAKI Kenichi 大学共同利用機関法人高エネルギー加速器研究機構, 超伝導低温工学センター, 准教授 (70322831) ; MIBE Tsutomu 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 准教授 (80536938) ; Toyoda Akihisa 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 助教 (20373186) ; Kawamura Naritoshi 大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 特別准教授 (60311338)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥42,510,000 (Direct Cost: ¥32,700,000、Indirect Cost: ¥9,810,000); Fiscal Year 2016: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000); Fiscal Year 2015: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000); Fiscal Year 2014: ¥28,210,000 (Direct Cost: ¥21,700,000、Indirect Cost: ¥6,510,000)
• Keywords: ミュオン / ミュオニウム / 超微細構造 / 精密磁場 / 素粒子実験 / 量子電磁力学 / 質量 / ｇ－２

Outline of Final Research Achievements

At the Muon Science Facility (MUSE) of J-PARC (Japan Proton Accelerator Research Complex), the MuSEUM collaboration is planing new measurements of the ground state hyperfine structure (HFS) of muonium both at zero field and at high magnetic field. The previous measurements were performed both at LAMPF (Los Alamos Meson Physics Facility) with experimental uncertainties mostly dominated by statistical errors. The new high intensity muon beam that will soon be available at MUSE H-Line will provide an opportunity to improve the precision of these measurements by one order of magnitude. In FY 2016, we succeeded to oberve the resonance of muonium hyperfine structure at zero field.

Research Products

• [Int'l Joint Research] Unversity of Massachusetts(米国)
• [Int'l Joint Research] University of Massachusetts(米国)
• [Journal Article] New precise measurement of muonium hyperfine structure interval at J-PARC (2017)
  • Author(s): Y. Ueno他39名（M. Iwasaki, R. Kadono, Y. Miyake, E. Torikai）
  • Journal Title: Hyperfine Interactions Volume: 238 Issue: 1 Pages: 14-14
  • DOI: 10.1007/s10751-016-1381-7
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] High-precision microwave spectroscopy of muonium for determination of muonic magnetic moment (2016)
  • Author(s): H.A. Torii, K.Shimomura et.al
  • Journal Title: Int. J. of Mod. Phys.: Conf. Ser. Volume: 40 Pages: 1660076-1660076
  • DOI: 10.1142/s2010194516600764
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Muonium in J-PARC from fundumental to application (2015)
  • Author(s): K.Shimomura
  • Journal Title: Hyperfine Interactions Volume: 233 Issue: 1-3 Pages: 89-95
  • DOI: 10.1007/s10751-015-1159-3
  • Peer Reviewed
• [Journal Article] Precision Measurement of Muonium Hyperfine Splitting at J-PARC and Integrated Detector System for High-Intensity Pulsed Muon Beam Experiment (2015)
  • Author(s): S.Kanda et al.
  • Journal Title: JPS Conf. Proc. Volume: 8
  • DOI: 10.7566/jpscp.8.025006
  • Int'l Joint Research
• [Journal Article] Precise Measurement of Muonium HFS at J-PARC MUSE (2015)
  • Author(s): H. A. Torii, M. Aoki, Y. Fukao, Y. Higashi, T. Higuchi, et al.
  • Journal Title: JPS Conference Proceedings Volume: 8
  • DOI: 10.7566/jpscp.8.025018
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] H line; a beam line for fundamental physics study (2014)
  • Author(s): N. Kawamura, A. Toyoda, M. Aoki, K. Shimomura, T. Mibe, Y. Nakatsugawa, M. Otani, N. Saito, and Y. Miyake
  • Journal Title: J. Phys.: Conf. Ser. 012062 Volume: 551 Pages: 1-6
  • DOI: 10.1088/1742-6596/551/1/012062
  • Peer Reviewed / Open Access
• [Journal Article] Measurement of Muonium Hyperfine Splitting at J-PARC (2014)
  • Author(s): K. S. Tanaka, M. Aoki, H. Iinuma, Y. Ikedo, K. Ishida, M. Iwasaki, Y. Ueno, R. Ohkubo, T. Ogitsu, R. Kadono, O. Kamigaito, N. Kawamura, D. Kawall, S. Kanda, K. Kubo, T. Kume, A. Koda, K. M. Kojima, N. Saito, N. Sakamoto, K. Sasaki, K. Shimomura, M. Sugano, D. Tomono, A. Toyoda, H. A. Torii, E. Torikai, K. Nagamine, K. Nishiyama, P. Strasser, Y. Fukao, Y. Fujiwara, Y. Matsuda, T. Mibe, Y. Miyake, and M. Yoshida
  • Journal Title: JPS Conf. Proc. Volume: 2 Pages: 1-6
  • DOI: 10.7566/jpscp.2.010405
  • Peer Reviewed
• [Presentation] Precise Measurement of Muonium HFS at J-PARC MUSE (2016)
  • Author(s): Y.Ueno
  • Organizer: 22nd International Spin Symposium
  • Place of Presentation: Urbana-Champaign,(USA)
  • Year and Date: 2016-09-25
  • Int'l Joint Research / Invited
• [Presentation] Present status of Mu HFS Measurement in J-PARC (2016)
  • Author(s): K.Shimomura
  • Organizer: 7th Meeting on CPT and Lorentz symmetry
  • Place of Presentation: Bloomington,(U.S.A)
  • Year and Date: 2016-06-20
  • Int'l Joint Research / Invited
• [Presentation] Muonium Hyperfine Structure Measurement at J-PARC (2015)
  • Author(s): K.Shimomura
  • Organizer: IUCSS Workshop on Signals for Nonminimal Lorentz and CPT Violation
  • Place of Presentation: Indiana University, Bloomington U.S.A
  • Year and Date: 2015-06-19
  • Int'l Joint Research / Invited
• [Presentation] Muonium in J-PARC (2014)
  • Author(s): K.Sｈimomura
  • Organizer: EXA2014
  • Place of Presentation: オーストリア ウイーン
  • Year and Date: 2014-09-15 – 2014-09-19
  • Invited