Imaginary part of the electromagnetic lepton form factors
High Energy Physics - Phenomenology
2009-10-31 v2
Abstract
The charge and the magnetic 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.
Cite
@article{arxiv.hep-ph/9805265,
title = {Imaginary part of the electromagnetic lepton form factors},
author = {L. V. Avdeev and M. Yu. Kalmykov},
journal= {arXiv preprint arXiv:hep-ph/9805265},
year = {2009}
}
Comments
New references added, the last section modified; final version to appear in Phys. Lett. B; LaTeX, 10 pages, 5 eps-figures included