Bochum 2009 – wissenschaftliches Programm
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HK: Fachverband Hadronen und Kerne
HK 51: Fundamental Symmetries
HK 51.6: Vortrag
Mittwoch, 18. März 2009, 15:30–15:45, H-ZO 70
A Precision Measurement of the Hyperfine Structure of Antiprotonic Helium — •Thomas Pask1, Daniel Barna2, Andreas Dax2, Sussane Friedreich1, Ryugo Hayano2, Masaki Hori3, Dezso Horvath4,5, Bertalan Juhasz1, Johann Marton1, Oswald Massiczek1, Naoya Ono2, Anna Soter3,4, Eberhard Widmann1, and Johann Zmeskal1 — 1Stefan-Meyer-Institut für subatomare Physik Boltzmanngasse 3, 1090 Vienna, Austria — 2Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan — 3Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, D-85748 Garching, Germany — 4Institute of Nuclear Research of the Hungarian Academy of Sciences, H-4001 Debrecen,PO Box 51, Hungary. — 5Institute of Nuclear Research of the Hungarian Academy of Sciences, H-4001 Debrecen,PO Box 51, Hungary.
A precise measurement of the Antiprotonic helium hyperfine structure has been completed.
Due to its long life time this unique particle provides an ideal subject to test three-body Quantum Electrodynamic (QED) calculations and CPT theory. The new results yield a factor of 10 improvement over our previous measurements and, through comparison with theory, can be used to determine a new value for the spin magnetic moment of the antiproton.