High-precision spectroscopy of antiprotonic helium.

被引：0

作者：

Widmann, E ^{[1
]}

机构：

[1] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

来源：

QUANTUM ELECTRODYNAMICS AND PHYSICS OF THE VACUUM | 2001年 / 564卷

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中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present first results of laser and microwave spectroscopy experiments of antiprotonic helium performed at the new Antiproton Decelerator (AD) at CERN. Extending a series of previous measurements done at the Low Energy Antiproton Ring (LEAR) of CERN, several laser-induced transitions of the antiproton in the exotic three-body system He2+-e(-)-p ($) over bar could be determined with a precision down to 1.3 x 10(-7) This constitutes an improvement of a factor 3 over previous measurements, and allows to test accurate three-body calculations of this system that include QED corrections. The observed agreement on the same level can be used to infer CPT Limits on the antiproton charge and mass. Furthermore, a first indication of a resonance signal of a two-laser microwave triple experiment to measure the hyperfine splitting of antiprotonic helium could been observed. Such a measurement has the potential to determine the antiproton magnetic moment to a higher precision that it is known today.

引用

页码：285 / 292

页数：8

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