TWO-PHOTON LASER SPECTROSCOPY OF ANTIPROTONIC HELIUM

被引：0

作者：

Hori, Masaki ^{[1
]}

机构：

[1] Max Planck Inst Quantum Opt, D-85748 Garching, Germany

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS E | 2013年 / 22卷 / 09期

基金：

欧洲研究理事会;

关键词：

Antiprotonic helium; CPT symmetry; laser spectroscopy; FUNDAMENTAL PHYSICAL CONSTANTS; CODATA RECOMMENDED VALUES; METASTABLE STATES; DECAY-RATES; MASS; RESOLUTION; PROFILES; MONITOR; ATOMS;

D O I：

10.1142/S0218301313300245

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The ASACUSA collaboration of CERN has recently carried out two-photon laser spectroscopy of antiprotonic helium atoms. Some nonlinear two-photon transitions of the antiproton at the deep UV wavelengths lambda = 139.8-197.0 nm were excited by irradiating the atom with two counterpropagating laser beams. This reduced the thermal Doppler broadening in the observed spectral lines. Three transition frequencies were thus determined with fractional precisions of 2.3-5 parts in 10(9). By comparing the results with three-body quantum electrodynamics calculations, the antiproton-to-electron mass ratio was derived as 1836.1526736(23). In this paper, we briefly review these recent experimental results.

引用

页数：11

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