Sub-ppm laser spectroscopy of antiprotonic helium and a CPT-violation limit on the antiprotonic charge and mass

M. Hori, J. Eades, R. S. Hayano, T. Ishikawa, J. Sakaguchi, E. Widmann, H. Yamaguchi, H. A. Torii, B. Juhász, D. Horváth, T. Yamazaki

Research output: Contribution to journalArticle

113 Citations (Scopus)

Abstract

The measurements of six laser-resonant transition frequencies detected in metastable antiprotoionic helium (He) atoms produced at CERN antiproton decelerator were described. Two transitions in the ultaviolet region and two with large Auger widths were detected. Zero density frequencies with fractional precisions were obtained from the pressure shift measurements. These calculation were compared with quantum electrodynamics (QED) and antiproton cyclotron frequency. A 90% confidence level agreement between the proton charges and masses was deduced.

Original languageEnglish
Article number093401
Pages (from-to)934011-934014
Number of pages4
JournalPhysical Review Letters
Volume87
Issue number9
Publication statusPublished - Aug 27 2001

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antiprotons
laser spectroscopy
helium
brakes (for arresting motion)
metastable atoms
cyclotron frequency
helium atoms
quantum electrodynamics
confidence
protons
shift
lasers

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Hori, M., Eades, J., Hayano, R. S., Ishikawa, T., Sakaguchi, J., Widmann, E., ... Yamazaki, T. (2001). Sub-ppm laser spectroscopy of antiprotonic helium and a CPT-violation limit on the antiprotonic charge and mass. Physical Review Letters, 87(9), 934011-934014. [093401].

Sub-ppm laser spectroscopy of antiprotonic helium and a CPT-violation limit on the antiprotonic charge and mass. / Hori, M.; Eades, J.; Hayano, R. S.; Ishikawa, T.; Sakaguchi, J.; Widmann, E.; Yamaguchi, H.; Torii, H. A.; Juhász, B.; Horváth, D.; Yamazaki, T.

In: Physical Review Letters, Vol. 87, No. 9, 093401, 27.08.2001, p. 934011-934014.

Research output: Contribution to journalArticle

Hori, M, Eades, J, Hayano, RS, Ishikawa, T, Sakaguchi, J, Widmann, E, Yamaguchi, H, Torii, HA, Juhász, B, Horváth, D & Yamazaki, T 2001, 'Sub-ppm laser spectroscopy of antiprotonic helium and a CPT-violation limit on the antiprotonic charge and mass', Physical Review Letters, vol. 87, no. 9, 093401, pp. 934011-934014.
Hori M, Eades J, Hayano RS, Ishikawa T, Sakaguchi J, Widmann E et al. Sub-ppm laser spectroscopy of antiprotonic helium and a CPT-violation limit on the antiprotonic charge and mass. Physical Review Letters. 2001 Aug 27;87(9):934011-934014. 093401.
Hori, M. ; Eades, J. ; Hayano, R. S. ; Ishikawa, T. ; Sakaguchi, J. ; Widmann, E. ; Yamaguchi, H. ; Torii, H. A. ; Juhász, B. ; Horváth, D. ; Yamazaki, T. / Sub-ppm laser spectroscopy of antiprotonic helium and a CPT-violation limit on the antiprotonic charge and mass. In: Physical Review Letters. 2001 ; Vol. 87, No. 9. pp. 934011-934014.
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AU - Sakaguchi, J.

AU - Widmann, E.

AU - Yamaguchi, H.

AU - Torii, H. A.

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