EPJ Web Conf.
Volume 166, 2018KLOE-2 Workshop on e+ e- Collision Physics at 1 GeV
|Number of page(s)||16|
|Published online||05 January 2018|
Muon g – 2 theory: The hadronic part
1 Deutsches Elektronen–Synchrotron (DESY), Platanenallee 6, D-15738 Zeuthen, Germany
2 Humboldt–Universität zu Berlin, Institut für Physik, Newtonstrasse 15, D-12489 Berlin, Germany
* e-mail: email@example.com
Published online: 5 January 2018
I present a status report of the hadronic vacuum polarization effects for the muon g–2, to be considered as an update of . The update concerns recent new inclusive R measurements from KEDR in the energy range 1.84 to 3.72 GeV. For the leading order contributions I find based on e+e- data [incl. τ data], (NLO) and (NNLO). Collecting recent progress in the hadronic light-by-light scattering I adopt π0, η, η' [95 ± 12] + axial-vector [8 ± 3] + scalar [-6 ± 1] + π, K loops [-20 ± 5] + quark loops [22 ± 4] + tensor [1 ± 0] + NLO [3 ± 2] which yields . With these updates I find a 4.1 σ deviation. Recent lattice QCD results and future prospects to improve hadronic contributions are discussed.
© The Authors, published by EDP Sciences, 2018
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. (http://creativecommons.org/licenses/by/4.0/).
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