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

Content Provider	Springer Nature Link
Author	Friedreich, Susanne Barna, Dániel Dax, Andreas Haya, Ryu Horváth, Dezső Hori, Masaki Juhász, Bertalan Massiczek, Oswald Sótér, Anna Pask, Thomas Widmann, Eberhard
Copyright Year	2011
Abstract	The spin magnetic moment $\mu^{\overline{p}}_{s}$ of the antiproton can be determined by comparing the measured transition frequencies in $\overline{p}^4$ 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 $\mu^{\overline{p}}_{s} = -2.7862(83)\mu_{N}$ , slightly better than the previously best measurement. This agrees with $\mu^{p}_{s}$ within 0.24%. In 2009, a new measurement with antiprotonic 3He 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 $\overline{p}^3$ He + . We report here on the new experimental setup and the first tests.
Starting Page	337
Ending Page	346
Page Count	10
File Format	PDF
ISSN	03043843
Journal	Hyperfine Interactions
Volume Number	199
Issue Number	1-3
e-ISSN	15729540
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-04-27
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Antiproton Antiprotonic helium Hyperfine structure Spectroscopy Laser Microwave Three-body quantum electrodynamics Atomic, Molecular, Optical and Plasma Physics Nuclear Physics, Heavy Ions, Hadrons Surfaces and Interfaces, Thin Films Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Atomic and Molecular Physics, and Optics Physical and Theoretical Chemistry Condensed Matter Physics

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