of charged leptons, , and the hyperfine splitting of muonium
Abstract
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 ($$a_e$$), muon ($$a_μ$$) and tau lepton ($$a_τ$$), 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, $$α(M^2_Z)$$ . 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 a μ and its Standard Model prediction amounts to $$Δa_μ$$ = (28.02 ± 7.37) × 10₋10, corresponding to a muon $$\mathcal{g}$$ ₋ 2 discrepancy of 3.8σ.
- Authors:
- Publication Date:
- Research Org.:
- Univ. of Mississippi, Oxford, MS (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- Science and Technology Facilities Council (STFC); USDOE Office of Science (SC), High Energy Physics (HEP); Japan Society for the Promotion of Science (JSPS)
- OSTI Identifier:
- 1595860
- Alternate Identifier(s):
- OSTI ID: 1802339
- Grant/Contract Number:
- SC0012391; AC02-07CH11359; ST/S000925/1; JP17H01133; ST/P000290/1; ST/S000879/1
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Name: Physical Review D Journal Volume: 101 Journal Issue: 1; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Astronomy & Astrophysics; Physics
Citation Formats
Keshavarzi, Alexander, Nomura, Daisuke, and Teubner, Thomas. g − 2 of charged leptons, α ( M Z 2 ) , and the hyperfine splitting of muonium. United States: N. p., 2020.
Web. doi:10.1103/PhysRevD.101.014029.
Keshavarzi, Alexander, Nomura, Daisuke, & Teubner, Thomas. g − 2 of charged leptons, α ( M Z 2 ) , and the hyperfine splitting of muonium. United States. https://doi.org/10.1103/PhysRevD.101.014029
Keshavarzi, Alexander, Nomura, Daisuke, and Teubner, Thomas. Wed .
"g − 2 of charged leptons, α ( M Z 2 ) , and the hyperfine splitting of muonium". United States. https://doi.org/10.1103/PhysRevD.101.014029.
@article{osti_1595860,
title = {g − 2 of charged leptons, α ( M Z 2 ) , and the hyperfine splitting of muonium},
author = {Keshavarzi, Alexander and Nomura, Daisuke and Teubner, Thomas},
abstractNote = {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 ($a_e$), muon ($a_μ$) and tau lepton ($a_τ$), 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, $α(M^2_Z)$ . 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 a μ and its Standard Model prediction amounts to $Δa_μ$ = (28.02 ± 7.37) × 10₋10, corresponding to a muon $\mathcal{g}$ ₋ 2 discrepancy of 3.8σ.},
doi = {10.1103/PhysRevD.101.014029},
journal = {Physical Review D},
number = 1,
volume = 101,
place = {United States},
year = {2020},
month = {1}
}
https://doi.org/10.1103/PhysRevD.101.014029
Web of Science
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