High-Precision Calculation of the Fine and Hyperfine Structure Splittings of Antiprotonic Helium-3,4 Atoms

Kino, Yasushi; Yamanaka, Nobuhiro; Kamimura, M.; Kawamura, Hiroshi

doi:10.1023/b:hype.0000004218.62114.f2

Cited by 24 publications

(30 citation statements)

References 11 publications

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“…From the measured frequency difference between two transitions it is possible to calculate the antiprotonic magnetic moment by comparison with the three-body QED calculations. The theoretical calculations have been developed by two different groups [5][6][7]. They used the same Hamiltonian for their calculations but the energy eigenvalues have been obtained using different variational methods.…”

Section: The Hyperfine Structure Of Antiprotonic Heliummentioning

confidence: 99%

Spectroscopy of the hyperfine structure of antiprotonic 4He and 3He

et al. 2011

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The spin magnetic moment μ p s of the antiproton can be determined by comparing the measured transition frequencies in p 4 He + with three-body QED calculations. A comparison between the proton and antiproton can then be used as a test of CPT invariance. The highest measurement precision of the difference between the proton and the antiproton spin magnetic moments to date is 0.3%. A new experimental value of the spin magnetic moment of the antiproton was obtained as μ 3 He has been started. A comparison between the theoretical calculations and experimental results would lead to a stronger test of the theory and address systematic errors therein. A measurement of this state will be the first HF measurement on p 3 He + . We report here on the new experimental setup and the first tests.

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Section: The Hyperfine Structure Of Antiprotonic Heliummentioning

confidence: 99%

Spectroscopy of the hyperfine structure of antiprotonic 4He and 3He

et al. 2011

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“…1) of pHe + has been calculated by Korobov and Bakalov [14][15][16][17] to the α 4 order. The dominant HF splitting is caused by the interaction of the antiproton orbital angular momentum L with the electron spin Se (p -e − spin-orbit splitting).…”

Section: Antiprotonic Helium Hyperfine Structurementioning

confidence: 99%

Preliminary results from recent measurements of the antiprotonic helium hyperfine structure

Pask¹

2009

Exa/Leap 2008

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We report on preliminary results from a systematic study of the hyperfine (HF) structure of antiprotonic helium. This precise measurement which was commenced in 2006, has now been completed. Our initial analysis shows no apparent density or power dependence and therefore the results can be averaged. The statistical error of the observable M1 transitions is a factor of 60 smaller than that of three body quantum electrodynamic (QED) calculations, while their difference has been resolved to a precision comparable to theory (a factor of 10 better than our first measurement). This difference is sensitive to the antiproton magnetic moment and agreement between theory and experiment would lead to an increased precision of this parameter, thus providing a test of CPT invariance.

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“…The HF splitting ( Fig. 1) of pHe + has been calculated by Korobov and Bakalov [14][15][16][17] to the α 4 order. The dominant HF splitting is caused by the interaction of the antiproton orbital angular momentum L with the electron spin Se (p -e − spin-orbit splitting).…”

Section: Antiprotonic Helium Hyperfine Structurementioning

confidence: 99%

Preliminary results from recent measurements of the antiprotonic helium hyperfine structure

Pask

2009

Hyperfine Interact

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We report on preliminary results from a systematic study of the hyperfine (HF) structure of antiprotonic helium. This precise measurement which was commenced in 2006, has now been completed. Our initial analysis shows no apparent density or power dependence and therefore the results can be averaged. The statistical error of the individual lines is a factor of 60 smaller than that of three body quantum electrodynamic (QED) calculations, while the difference has been resolved to a precision comparable to theory (a factor of 10 better than our first measurement). Agreement between theory and experiment would lead to an increased precision of the measurement for the antiproton magnetic moment and provide a test of CPT invariance.

show abstract

High-Precision Calculation of the Fine and Hyperfine Structure Splittings of Antiprotonic Helium-3,4 Atoms

Cited by 24 publications

References 11 publications

Spectroscopy of the hyperfine structure of antiprotonic 4He and 3He

Spectroscopy of the hyperfine structure of antiprotonic 4He and 3He

Preliminary results from recent measurements of the antiprotonic helium hyperfine structure

Preliminary results from recent measurements of the antiprotonic helium hyperfine structure

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