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Leptonic contributions to the effective electromagnetic coupling at four-loop order in QED

Authors
Journal
Nuclear Physics B
0550-3213
Publisher
Elsevier
Publication Date
Volume
874
Issue
3
Identifiers
DOI: 10.1016/j.nuclphysb.2013.06.009
Keywords
  • Particle Physics
Disciplines
  • Physics

Abstract

Abstract The running of the effective electromagnetic coupling is for many electroweak observables the dominant correction. It plays an important role for deriving constraints on the Standard Model in the context of electroweak precision measurements. We compute the four-loop QED corrections to the running of the effective electromagnetic coupling and perform a numerical evaluation of the different gauge invariant subsets.

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