$(Zα)^{4}$ order of the polarization operator in Coulomb field at low energy

Details $(Zα)^{4}$ order of the polarization operator in Coulomb field at low energy $(Zα)^{4}$ order of the polarization operator in Coulomb field at low energy

2008-07-15

arxiv.org/abs/0807.2335v1

Nucl.Phys.B807:73-88,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 10 figures

Scientific paper

10.1016/j.nuclphysb.2008.08.010

We derive the low-energy expansion of $(Z\alpha) ^{2}$ and $(Z\alpha) ^{4}$
terms of the polarization operator in the Coulomb field. Physical applications
such as the low-energy Delbr\"{u}ck scattering and "magnetic loop" contribution
to the $g$ factor of the bound electron are considered.

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