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Muon g – 2 theory: The hadronic part

Fred Jegerlehner
(
- DESY, Zeuthen and
- Humboldt U., Berlin
)

Apr 29, 2017

16 pages

Part of Proceedings, KLOE-2 Workshop on $e^+ e^-$ Collision Physics at 1 GeV : Frascati, Italy, October 26-28, 2016

Published in:

EPJ Web Conf. 166 (2018) 00022

Contribution to:

KLOE-2 Workshop on $e^+ e^-$ Collision Physics at 1 GeV

Published: 2018

e-Print:

1705.00263 [hep-ph]

DOI:

10.1051/epjconf/201816600022

Report number:

DESY-17-058,
HU-EP-17-12

View in:

ADS Abstract Service

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Abstract: (EDP Sciences)

I present a status report of the hadronic vacuum polarization effects for the muon g–2, to be considered as an update of [1]. 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.

Note:

17 pages, 26 figures

vacuum polarization: hadronic
muon: magnetic moment
higher-order: 0
vacuum polarization: effect
photon photon: scattering
lattice field theory
activity report
eta(958)
quark
KEDR

References(110)

Figures(26)

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