One more hard three-loop correction to parapositronium energy levels

One more hard three-loop correction to parapositronium energy levels
复制标题

对正电子素能级的又一硬三环校正

DOI:
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发表时间:
2017
期刊:
影响因子:
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通讯作者:
V. Shelyuto
V. Shelyuto
中科院分区:
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文献类型:
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作者:
M. I. Eides;V. Shelyuto

文献摘要

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计算了对电子偶素能级的一个硬三环修正。这种非对数贡献是由于在虚双光子湮没图中的费米子线中插入了单圈光子传播子。对于这种能量移动,我们得到Δ E=0.03297(2)(π ^7/π ^3)。
A hard three-loop correction to parapositronium energy levels of order $malpha^7$ is calculated. This nonlogarithmic contribution is due to the insertions of one-loop photon propagator in the fermion lines in the diagrams with virtual two-photon annihilation. We obtained $Delta E=0.03297(2)(malpha^7/pi^3)$ for this energy shift.