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arXiv 0908.3754physics.atom-ph
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中Z类氢离子基态的双圈自能

The two-loop self-energy for the ground state of medium-Z hydrogen-like ions

V. A. Yerokhin

摘要:

计算了核电荷Z=10-30的类氢离子在束缚场中无膨胀时的基态兰姆位移的双圈自能修正。本文提出了一种处理混合坐标-动量表象中Feynman图的计算方法,与已有的结果相比,该方法在数值精度上有显著的提高。对Z=1的所有阶数值数据的外推产生氢的高阶余项函数的结果。以前报道的分歧之间的所有秩序和微扰的方法减少到边际协议。

英文摘要:

The two-loop self-energy correction to the ground state Lamb shift is calculated for hydrogen-like ions with the nuclear charge Z=10-30 without any expansion in the binding field of the nucleus. A calculational technique is reported for treatment of Feynman diagrams in the mixed coordinate-momentum representation, which yields significant improvement in numerical accuracy as compared to previous results. An extrapolation of the all-order numerical data towards Z=1 yields a result for the higher-order remainder function for hydrogen. The previously reported disagreement between the all-order and the perturbative approaches is reduced to the marginal agreement.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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