Remarks on the effect of bound states and threshold in g-2
High Energy Physics - Phenomenology
2014-07-23 v2
Abstract
Recently, the contribution of positronium bound states to the electron anomalous magnetic moment was computed in Refs.[1,2]. It was argued there that this O(alpha^5) contribution is missed if electron g-2 is calculated within conventional perturbative QED and, as such, it must be added to the perturbative five-loop result. We show that this conclusion is flawed and that no additional contributions to g-2 are generated in QED beyond the perturbation theory.
Keywords
Cite
@article{arxiv.1402.5690,
title = {Remarks on the effect of bound states and threshold in g-2},
author = {Kirill Melnikov and Arkady Vainshtein and Mikhail Voloshin},
journal= {arXiv preprint arXiv:1402.5690},
year = {2014}
}
Comments
3 pages, v.2 mistake in the derivation corrected, discussion expanded, conclusions unchanged