of charged leptons, , and the hyperfine splitting of muonium
Nov 1, 2019
15 pages
Published in:
- Phys.Rev.D 101 (2020) 1, 014029
- Published: Jan 30, 2020
e-Print:
- 1911.00367 [hep-ph]
DOI:
- 10.1103/PhysRevD.101.014029 (publication)
Report number:
- MAN/HEP/2019/010,
- LTH 1216,
- KEK-TH-2165
View in:
Citations per year
Abstract: (APS)
Following updates in the compilation of e+e-→hadrons data, this work presents reevaluations of the hadronic vacuum polarization contributions to the anomalous magnetic moments of the electron (ae), muon (aμ) and tau lepton (aτ), to the ground-state hyperfine splitting of muonium and also updates the hadronic contributions to the running of the QED coupling at the mass scale of the Z boson, α(MZ2). Combining the results for the hadronic vacuum polarization contributions with recent updates for the hadronic light-by-light corrections, the electromagnetic and the weak contributions, the deviation between the measured value of aμ and its Standard Model prediction amounts to Δaμ=(28.02±7.37)×10-10, corresponding to a muon g-2 discrepancy of 3.8σ.Note:
- 25 pages, 9 figures
- Strong Interactions
- vacuum polarization: hadronic
- muonium: hyperfine structure
- electron: magnetic moment
- muon: magnetic moment
- tau: magnetic moment
- electromagnetic interaction: coupling constant
- ground state: hyperfine structure
- mass: scale
- photon photon: scattering
References(84)
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