电子、μ子和τ子夸克磁矩在 α² 和 α³ 级的精确质量相关 QED 贡献
高能物理 - 唯象学
2008-11-26 v4 高能物理 - 实验
摘要
presented improved values for the two- and three-loop mass-dependent QED contributions to the anomalous magnetic moments of the electron, muon, and tau lepton. The Standard Model prediction for the electron (g-2) is compared with its most precise recent measurement, providing a value of the fine-structure constant in agreement with a recently published determination. For the tau lepton, differences with previously published results are found and discussed. An updated value of the fine-structure constant is presented in "Note added after publication."
引用
@article{arxiv.hep-ph/0606174,
title = {Precise mass-dependent QED contributions to leptonic g-2 at order alpha^2 and alpha^3},
author = {M. Passera},
journal= {arXiv preprint arXiv:hep-ph/0606174},
year = {2008}
}
备注
6 pages, 1 figure. v2: New determination of alpha presented (based on the recent electron g-2 measurement). v3: New formulae added in Sec.IIB. v4: Updated value of alpha presented