Fine and hyperfine structure in different bound systems

Details Fine and hyperfine structure in different bound systems Fine and hyperfine structure in different bound systems

2005-09-02

arxiv.org/abs/hep-ph/0509019v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

36 pages, 2 figures

Scientific paper

We demonstrate that the generalized Gell-Mann-Low theorem permits for a systematic expansion around the nonrelativistic limit when applied to bound states in the Wick-Cutkosky model, Yukawa theory, and QED (in Coulomb gauge). We apply this expansion to obtain new results for the fine and hyperfine structure of bound states in the cases of the Wick-Cutkosky model and Yukawa theory, and reproduce correctly the fine and hyperfine structure of hydrogenic systems.

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