Leptonic contribution to the effective electromagnetic coupling constant up to three loops

Details Leptonic contribution to the effective electromagnetic coupling constant up to three loops Leptonic contribution to the effective electromagnetic coupling constant up to three loops

1998-03-11

arxiv.org/abs/hep-ph/9803313v1

Phys.Lett. B429 (1998) 158-161

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages (Latex) 2 figures

Scientific paper

10.1016/S0370-2693(98)00503-6

In this note the leptonic contribution to the running of the electromagnetic
coupling constant is discussed up to the three-loop level. Special emphasize is
put on the evaluation of the double-bubble diagrams.

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