Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2001-02-06
Physics
Nuclear Physics
Nuclear Experiment
Proceedings of the Hydrogen II workshop, Castiglione della Pescaia, June 1 --3, 2000, 15 pages, 8 figures
Scientific paper
This paper describes measurements of the hyperfine structure of two antiprotonic atoms that are planned at the Antiproton Decelerator (AD) at CERN. The first part deals with antiprotonic helium, a three-body system of alpha-particle, antiproton and electron that was previously studied at LEAR. A measurement will test existing three-body calculations and may - through comparison with these theories - determine the magnetic moment of the antiproton more precisely than currently available, thus providing a test of CPT invariance. The second system, antihydrogen, consisting of an antiproton and a positron, is planned to be produced at thermal energies at the AD. A measurement of the ground-state hyperfine splitting, which for hydrogen is one of the most accurately measured physical quantities, will directly yield a precise value for the magnetic moment of the antiproton, and also compare the internal structure of proton and antiproton through the contribution of the magnetic size of the antiproton to the ground state hyperfine splitting.
Eades J.
Hayano Ruyugo S.
Hori Masaki
Horvath Denis
Ishikawa Tadashi
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