2002/10/29 by E. Widmann, Widmann, E.
Physics and Astronomy · #FOS: Physical sciences #Nuclear Experiment (nucl-ex) #nucl-ex
paper · pdf · doi:10.48550/arxiv.nucl-ex/0210038
Invited talk at the XIVth Rencontres de Blois on Matter-Antimatter Asymmetry, Blois, June 2002
arxiv created 2002/10/29 · arxiv updated 2009/12/01
This talk gives an overview of the recent results on the precision spectroscopy of antiprotonic helium which was performed by the ASACUSA collaboration at the Antiproton Decelerator of CERN. The laser spectroscopy of energy levels of the antiproton has reached a relative accuracy of ∼ 10-7, and by comparing the experimental value for the transition wavelengths with theoretical calculations, a CPT test on the equality of proton and antiproton charge and mass of <6×10-8 has been obtained. In a recent experiment, the hyperfine structure of the (n,l)=(37,35) state of antiprotonic helium has been measured for the first time with an accuracy of 3 × 10-5.