Precise laser spectroscopy of the antiprotonic helium atom and CPT test on antiproton mass and charge

Details Precise laser spectroscopy of the antiprotonic helium atom and CPT test on antiproton mass and charge Precise laser spectroscopy of the antiprotonic helium atom and CPT test on antiproton mass and charge

2003-03-19

arxiv.org/abs/nucl-ex/0303006v1

Nucl.Phys. A721 (2003) 473-476

Physics

Nuclear Physics

Nuclear Experiment

proceeding of the conference, "PANIC02"

Scientific paper

10.1016/S0375-9474(03)01102-3

We have measured twelve transition frequencies of the antiprotonic helium
atom (pbar-He+) with precisions of 0.1--0.2 ppm using a laser spectroscopic
method. The agreement between the experiment and theories was so good that we
can put a limit on the proton-antiproton mass (or charge) difference. The new
limit is expected to be much smaller than the already published value, 60 ppb.

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