Antiproton magnetic moment determined from the HFS of over(p, ̄) He+

T. Pask, D. Barna, A. Dax, R. S. Hayano, M. Hori, D. Horváth, S. Friedreich, B. Juhász, O. Massiczek, N. Ono, A. Sótér, E. Widmann

Research output: Contribution to journalArticle

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Abstract

We report a determination of the antiproton magnetic moment, measured in a three-body system, independent of previous experiments. We present results from a systematic study of the hyperfine (HF) structure of antiprotonic helium where we have achieved a precision more than a factor of 10 better than our first measurement. A comparison between the experimental results and three-body quantum electrodynamic (QED) calculations leads to a new value for the antiproton magnetic moment μsover(p, ̄) = - 2.7862 (83) μN, which agrees with the magnetic moment of the proton within 2.9 × 10- 3.

Original languageEnglish
Pages (from-to)55-59
Number of pages5
JournalPhysics Letters B
Volume678
Issue number1
DOIs
Publication statusPublished - Jul 6 2009

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antiprotons
magnetic moments
quantum electrodynamics
hyperfine structure
helium
protons

Keywords

  • Antiprotonic helium
  • CPT invariance
  • Hyperfine structure
  • Microwave spectroscopy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Antiproton magnetic moment determined from the HFS of over(p, ̄) He+. / Pask, T.; Barna, D.; Dax, A.; Hayano, R. S.; Hori, M.; Horváth, D.; Friedreich, S.; Juhász, B.; Massiczek, O.; Ono, N.; Sótér, A.; Widmann, E.

In: Physics Letters B, Vol. 678, No. 1, 06.07.2009, p. 55-59.

Research output: Contribution to journalArticle

Pask, T, Barna, D, Dax, A, Hayano, RS, Hori, M, Horváth, D, Friedreich, S, Juhász, B, Massiczek, O, Ono, N, Sótér, A & Widmann, E 2009, 'Antiproton magnetic moment determined from the HFS of over(p, ̄) He+', Physics Letters B, vol. 678, no. 1, pp. 55-59. https://doi.org/10.1016/j.physletb.2009.05.038
Pask, T. ; Barna, D. ; Dax, A. ; Hayano, R. S. ; Hori, M. ; Horváth, D. ; Friedreich, S. ; Juhász, B. ; Massiczek, O. ; Ono, N. ; Sótér, A. ; Widmann, E. / Antiproton magnetic moment determined from the HFS of over(p, ̄) He+. In: Physics Letters B. 2009 ; Vol. 678, No. 1. pp. 55-59.
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AU - Pask, T.

AU - Barna, D.

AU - Dax, A.

AU - Hayano, R. S.

AU - Hori, M.

AU - Horváth, D.

AU - Friedreich, S.

AU - Juhász, B.

AU - Massiczek, O.

AU - Ono, N.

AU - Sótér, A.

AU - Widmann, E.

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