QED vacuum polarization in the Coulomb field of a nucleus: a method of high-order calculation
Fuente:
arXiv
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866918471351140352 |
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| author | Volkov, Sergey |
| author_facet | Volkov, Sergey |
| contents | A calculation of the QED vacuum polarization potential in the Coulomb field of a pointlike nucleus was presented in an earlier publication by the author and his collaborators. Corrections up to order $α^2 (Zα)^7$ were evaluated, where $Z$ is the nuclear charge number and $Zα$ is treated as an independent variable. These corrections correspond to two-loop Feynman graphs with proper propagators of fermions in the external field. The calculation employed a reduction to free QED, leading to free QED Feynman graphs with up to eight independent loops. The method of calculation is described here in detail. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_02957 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | QED vacuum polarization in the Coulomb field of a nucleus: a method of high-order calculation Volkov, Sergey Atomic Physics High Energy Physics - Phenomenology A calculation of the QED vacuum polarization potential in the Coulomb field of a pointlike nucleus was presented in an earlier publication by the author and his collaborators. Corrections up to order $α^2 (Zα)^7$ were evaluated, where $Z$ is the nuclear charge number and $Zα$ is treated as an independent variable. These corrections correspond to two-loop Feynman graphs with proper propagators of fermions in the external field. The calculation employed a reduction to free QED, leading to free QED Feynman graphs with up to eight independent loops. The method of calculation is described here in detail. |
| title | QED vacuum polarization in the Coulomb field of a nucleus: a method of high-order calculation |
| topic | Atomic Physics High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2510.02957 |