Precision measurement of fundamental physical constants using exotic-atom spectroscopy

2012 Fiscal Year Final Research Report

• Project/Area Number: 20002003
• Research Category: Grant-in-Aid for Specially Promoted Research
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering; Mathematics and Physics
• Research Institution: The University of Tokyo
• Principal Investigator: HAYANO Ryugo 東京大学, 大学院・理学系研究科, 教授 (30126148)
• Project Period (FY): 2008 – 2012
• Keywords: 反陽子 / K 中間子 / レーザー分光 / X 線分光 / CERN / J-PARC / 基礎物理定数

Research Abstract

Using the precision laser spectroscopy of antiprotonic helium (metastable atom made of a helium nucleus, an antiproton and an electron), the antiproton-to-electron mass ratio was determined to a fractional precision of 10^-9. This was used in the CODATA2010 adjustment of fundamental physical constants, thereby fulfilling the initial goal of this project.

Research Products

• [Journal Article] Deeply bound pionic states in heavy nuclei (2012)
  • Author(s): T. Yamazaki, S. Hirenzaki, R.S. Hayano and H. Toki
  • Journal Title: Phys. Reports Volume: 514 Pages: 1-87
  • Peer Reviewed
• [Journal Article] Kaonic hydrogen X-ray measurement in SIDDHARTA (2012)
  • Author(s): M. Bazzi, G. Beer, L. Bombelli, A.M. Bragadireanu, M. Cargnelli, G. Corradi, C. Curceanu, A. d'Uffizi, C. Fiorini, T. Frizzi, F. Ghio, C. Guaraldo, R.S. Hayano, 他 24 名
  • Journal Title: Nucl. Phys Volume: A881 Pages: 88-97
  • Peer Reviewed
• [Journal Article] Sub-Doppler two-photon laser spectroscopy of antiprotonic helium and the antiproton-to-electron mass ratio (2011)
  • Author(s): M. Hori, A. Soter, D. Barna, A. Dax, R.S. Hayano, 他7名
  • Journal Title: Nature Volume: 475 Pages: 484-488
  • Peer Reviewed
• [Journal Article] First observation of two hyperfine transitions in antiprotonic 3^He (2011)
  • Author(s): S. Friedreich, D. Barna, F. Caspers, A. Dax, R.S. Hayano, 他9名
  • Journal Title: Phys. Lett Volume: B 700 Pages: 1
  • Peer Reviewed
• [Journal Article] First measurement of kaonic helium-3 X-rays (2011)
  • Author(s): M. Bazzi, G. Beer, L. Bombelli, A.M. Bragadireanu, M. Cargnelli, G. Corradi, C. Curceanu, A. d'Uffizi, C. Fiorini, T. Frizzi, F. Ghio, B. Girolami, C. Guaraldo, R.S. Hayano, 他 2
  • Journal Title: Physics Letters Volume: B 697 Pages: 199-202
  • Peer Reviewed
• [Journal Article] Hadron properties in the nuclear medium (2010)
  • Author(s): R.S. Hayano and T. Hatsuda
  • Journal Title: Reviews of Modern Physics Volume: 82 Pages: 2949-2990
  • Peer Reviewed
• [Journal Article] Spectroscopy of antiprotonic helium atoms and its contribution to the fundamental physical constants (2010)
  • Author(s): R.S. Hayano
  • Journal Title: Proc. Japan Academy Series Volume: B 86 Pages: 1-10
  • Peer Reviewed
• [Journal Article] Antiprotonic Helium Atoms (2009)
  • Author(s): R.S. Hayano
  • Journal Title: Nucl. Phys. News Volume: 19 Pages: 18
  • Peer Reviewed
• [Presentation] Weighing the antiproton: precision laser spectroscopy of antiprotonic heliumatoms (2012)
  • Author(s): R.S. Hayano
  • Organizer: 5th International Symposium on Symmetries in Subatomic Physics
  • Place of Presentation: Groningen (The Netherlands)
  • Year and Date: 20120600
• [Presentation] Meson-Nucleus bound states (2012)
  • Author(s): R.S. Hayano
  • Organizer: Hadrons in the Nuclear Medium
  • Place of Presentation: ECT*, Trento (Italy)
  • Year and Date: 20120500
• [Presentation] Hadronic Atoms (2011)
  • Author(s): R.S. Hayano
  • Organizer: 10th International Conference on Low Energy Antiproton Physics: LEAP2011
  • Place of Presentation: Vancouver (Canada)
  • Year and Date: 20110400
• [Presentation] Kaonic-Helium X-Rays (2010)
  • Author(s): R.S. Hayano
  • Organizer: International Nuclear Physics Conference: INPC2010
  • Place of Presentation: Vancouver, Canada
  • Year and Date: 20100700
• [Presentation] Testing the CPTsymmetry using slow antiprotons (2009)
  • Author(s): R.S. Hayano
  • Organizer: 3rdJoint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan: HAW09
  • Place of Presentation: Waikoloa, Hawaii
  • Year and Date: 20091000
• [Presentation] ASACUSA-future opportunities (2009)
  • Author(s): R.S. Hayano
  • Organizer: New Opportunities in the Physics Landscape at CERN
  • Place of Presentation: CERN
  • Year and Date: 20090500
• [Presentation] Kaonic helium atoms (2008)
  • Author(s): R.S. Hayano
  • Organizer: PANIC08
  • Place of Presentation: Eilat, Israel
  • Year and Date: 20081100
• [Presentation] Antiprotonic and kaonic Helium Atoms (2008)
  • Author(s): R.S. Hayano
  • Organizer: Precision Spectroscopy of Simple Atoms 2008
  • Place of Presentation: Windsor, Canada
  • Year and Date: 20080700
• [Remarks]
  • URL: http://nucl.phys.s.u-tokyo.ac.jp/hayano
• [Remarks]
  • URL: http://www.s.u-tokyo.ac.jp/story/rigakuru/world/04/01.html
• [Remarks]
  • URL: http://www.s.u-tokyo.ac.jp/movie.html?name=hayano20110304
• [Patent(Industrial Property Rights)] Laser analytical instrument, laser analytical method, and gas leakinspection instrument (2010)
  • Inventor(s): Hayano 他
  • Industrial Property Number: US 7,663,122 B2
  • Acquisition Date: 2010-02-16
• [Patent(Industrial Property Rights)] Laser analytical instrument, laser analytical method, and gas leak inspection instrument (2007)
  • Inventor(s): Hayano 他
  • Industrial Property Number: EP1775576
  • Acquisition Date: 2007-04-18