The analytical value of the electron light-light graphs contribution to the muon ( g−2) in QED

The contribution to the ( g−2) of a lepton of mass M from the light-light graphs with a loop lepton of mass m is evaluated analytically in sixth order QED perturbation theory for arbitrary values of the ratio of the masses, and the cases of physical relevance are then derived from the general expres...

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Bibliographic Details
Published in:Physics letters. B 1993-03, Vol.301 (4), p.440-446
Main Authors: Laporta, S., Remiddi, E.
Format: Article
Language:English
Subjects:
Exact sciences and technology
Physics
Quantum electrodynamics
Specific theories and interaction models
particle systematics
The physics of elementary particles and fields
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Summary:The contribution to the ( g−2) of a lepton of mass M from the light-light graphs with a loop lepton of mass m is evaluated analytically in sixth order QED perturbation theory for arbitrary values of the ratio of the masses, and the cases of physical relevance are then derived from the general expression. In particular, the analytical value of the ( g−2) of the μ lepton from light-light graphs with an electron loop is presented; the result is in excellent agreement with the most precise numerical evaluations already existing in the literature.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(93)91176-N