QCD determination of the leading order hadronic contribution to the muon g - 2
Abstract
The leading order hadronic contribution to the muon magnetic moment anomaly, a^{HAD}_μ, is determined entirely in the framework of QCD. The result in the light-quark sector, in units of 10^{-10}, is a^{HAD}_μ\vert _{uds} =686 ± 26, and in the heavy-quark sector a^{HAD}_μ\vert c =14.4 ± 0.1, and a^{HAD}_μ\vert b =0.29 ± 0.01, resulting in a^{HAD}_μ = 701 ± 26 . The main uncertainty is due to the current lattice QCD value of the first and second derivative of the electromagnetic current correlator at the origin. The expected improvement in the precision of these derivatives may render this approach the most accurate and trustworthy determination of the leading order a^{HAD}_μ.
- Publication:
-
Nuovo Cimento C Geophysics Space Physics C
- Pub Date:
- September 2018
- DOI:
- 10.1393/ncc/i2017-17179-1
- arXiv:
- arXiv:1704.02843
- Bibcode:
- 2018NCimC..40..179D
- Keywords:
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- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment;
- High Energy Physics - Lattice
- E-Print:
- Invited talk at "Les Rencontres de Physique de la Vallee d'Aosta", March 2017. Speaker: C. A. Dominguez. To be published in Nuovo Cimento C