Two-loop QED bound-state calculations and squared decay rates

U. Jentschura, Christoph H. Keitel, Krzysztof Pachucki

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We discuss the ε method as used in various recent QED bound-state calculations by considering mathematical-model examples. Recently obtained results for higher order self-energy binding corrections at the two-loop level are reviewed. Problems associated with the interpretation of squared decay rates as radiative bound-state energy-level shifts are discussed. We briefly expand on the relation of squared decay rates to nonresonant and radiative corrections to the Lorentzian line shape, including their dependence on the experimental process under study.

Original languageEnglish
Pages (from-to)1213-1223
Number of pages11
JournalCanadian Journal of Physics
Volume80
Issue number11
DOIs
Publication statusPublished - 2002

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decay rates
line shape
mathematical models
binding energy
energy levels
shift

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Two-loop QED bound-state calculations and squared decay rates. / Jentschura, U.; Keitel, Christoph H.; Pachucki, Krzysztof.

In: Canadian Journal of Physics, Vol. 80, No. 11, 2002, p. 1213-1223.

Research output: Contribution to journalArticle

Jentschura, U. ; Keitel, Christoph H. ; Pachucki, Krzysztof. / Two-loop QED bound-state calculations and squared decay rates. In: Canadian Journal of Physics. 2002 ; Vol. 80, No. 11. pp. 1213-1223.
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