Imaginary part of the electromagnetic lepton form factors

Details Imaginary part of the electromagnetic lepton form factors Imaginary part of the electromagnetic lepton form factors

1998-05-08

arxiv.org/abs/hep-ph/9805265v2

Phys.Lett. B436 (1998) 132-138

Physics

High Energy Physics

High Energy Physics - Phenomenology

New references added, the last section modified; final version to appear in Phys. Lett. B; LaTeX, 10 pages, 5 eps-figures incl

Scientific paper

10.1016/S0370-2693(98)00838-7

The charge $F_1(0)$ and the magnetic $F_2(0)$ form factors of heavy charged
leptons have been shown in the framework of the perturbation theory to have
imaginary part. The imaginary parts of the form factors for muon and tau lepton
have been calculated at the two-loop level in the Standard Model. The effects
where these imaginary parts could manifest themselves are discussed.

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