Two-Loop Self-Energy Corrections to the Fine-Structure
| dc.creator | Jentschura, Ulrich D. | |
| dc.creator | Pachucki, Krzysztof | |
| dc.date | 2001-11-07 | |
| dc.date | 2002-02-01 | |
| dc.date.accessioned | 2026-07-07T10:52:30Z | |
| dc.date.available | 2026-07-07T10:52:30Z | |
| dc.description | We investigate two-loop higher-order binding corrections to the fine structure, which contribute to the spin-dependent part of the Lamb shift. Our calculation focuses on the so-called ``two-loop self-energy'' involving two virtual closed photon loops. For bound states, this correction has proven to be notoriously difficult to evaluate. The calculation of the binding corrections to the bound-state two-loop self-energy is simplified by a separate treatment of hard and soft virtual photons. The two photon-energy scales are matched at the end of the calculation. We explain the significance of the mathematical methods employed in the calculation in a more general context, and present results for the fine-structure difference of the two-loop self-energy through the order of $α^8$. | |
| dc.description | 19 pages, LaTeX, 2 figures; J. Phys. A (in press); added analytic results for two-loop form-factor slopes (by P. Mastrolia and E. Remiddi) | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0111084 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0111084 | |
| dc.identifier | J.Phys.A35:1927-1942,2002 | |
| dc.identifier | doi:10.1088/0305-4470/35/8/310 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/185178 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Two-Loop Self-Energy Corrections to the Fine-Structure | |
| dc.type | text |