| Issue |
EPJ Web Conf.
Volume 218, 2019
The 11th International Workshop on e+e− Collisions from Phi to Psi (PhiPsi 2017)
|
|
|---|---|---|
| Article Number | 01002 | |
| Number of page(s) | 4 | |
| Section | (g — 2)μ | |
| DOI | https://doi.org/10.1051/epjconf/201921801002 | |
| Published online | 18 October 2019 | |
https://doi.org/10.1051/epjconf/201921801002
Update on the hadronic vacuum polarisation contributions to muon g − 2 and α(mZ2)
Laboratoire de l’Accélérateur Linéaire, IN2P3-CNRS et Université Paris-Sud 11, F-91898, Orsay Cedex, France
* in collaboration with M. Davier, A. Hoecker and B. Malaescu. e-mail: zhangzq@lal.in2p3.fr
Published online: 18 October 2019
An update of the hadronic vacuum polarisation contributions to the muon magnetic anomaly and to the running of the electromagnetic couplings constant at the Z-boson mass is presented. Newest e+e−→ hadrons cross-section data mainly from the BABAR and VEPP-2000 experiments have been included. For the muon (g−2)/2, the lowest-order hadronic contribution is evaluated to be (693.1 ± 3.4) · 10−10, improving the precision of our previous evaluation by 21%. The full Standard Model prediction differs by 3.5 σ from the experimental value. The five-quark hadronic contribution to 
is evaluated to be (276.0 ± 0.9) · 10−4.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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