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arxiv 1911.00367 v2 pith:IESUVOSF submitted 2019-11-01 hep-ph hep-ex

The g-2 of charged leptons, α(M_Z²) and the hyperfine splitting of muonium

classification hep-ph hep-ex
keywords contributionshadronicupdatesalphahyperfinemuonmuoniumpolarisation
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Following updates in the compilation of $e^+e^-\rightarrow{\rm hadrons}$ data, this work presents re-evaluations of the hadronic vacuum polarisation contributions to the anomalous magnetic moment of the electron ($a_e$), muon ($a_\mu$) and tau lepton ($a_\tau$), 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, $\alpha(M_Z^2)$. Combining the results for the hadronic vacuum polarisation contributions with recent updates for the hadronic light-by-light corrections, the electromagnetic and the weak contributions, the deviation between the measured value of $a_\mu$ and its Standard Model prediction amounts to $\Delta a_{\mu} = (28.02 \pm 7.37) \times 10^{-10}$, corresponding to a muon $g-2$ discrepancy of $3.8\sigma$.

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Cited by 16 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Higher-order hadronic vacuum polarization contribution to the muon $g-2$ from lattice QCD

    hep-lat 2026-03 conditional novelty 9.0

    Lattice QCD yields the NLO HVP contribution to muon g-2 as -101.57(26)stat(54)syst ×10^{-11}, 1.4σ below the 2025 White Paper estimate and twice as precise.

  2. Lattice determination of the higher-order hadronic vacuum polarization contribution to the muon $g-2$

    hep-lat 2026-04 unverdicted novelty 8.0

    Lattice QCD gives a_μ^{hvp,nlo} = (-101.57 ± 0.60) × 10^{-11} at 0.6% precision, 1.4σ below the 2025 White Paper estimate and in 4.6σ tension with pre-CMD-3 data-driven results.

  3. Light new physics and the $\tau$ lepton dipole moments: prospects at Belle II

    hep-ph 2025-10 unverdicted novelty 7.0

    Light new particles generate asymmetries in e+e- to tau+tau- that allow model-dependent constraints on tau dipole moments, including non-zero effects without electron polarization via imaginary parts.

  4. Hadronic vacuum polarization in hydrogen-like atoms and ions amid the interplay of recoil and finite-size effects

    physics.atom-ph 2026-07 accept novelty 6.0

    The hVP contribution to the HFS in muonic hydrogen is 2.153(11) µeV, deviating from previous evaluations by ~10x the anticipated experimental precision, due to corrected recoil and finite-size interplay.

  5. Lepton $g-2$ non-universality of hadronic contributions and a sub-GeV window to New Physics

    hep-ph 2026-06 unverdicted novelty 6.0

    A rescaled difference a_μ-e of lepton g-2 values cancels short-distance effects and cuts hadronic vacuum polarization uncertainty by ~85%, offering a cleaner probe for sub-GeV new physics.

  6. Muon $g$$-$2: correlation-induced uncertainties in precision data combinations

    hep-ph 2026-04 unverdicted novelty 6.0

    A general framework quantifies correlation-induced uncertainties in precision data combinations and applies it to e+e- to hadrons cross sections for muon g-2 HVP determinations.

  7. Light new physics and the $\tau$ lepton dipole moments

    hep-ph 2025-11 unverdicted novelty 6.0

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  8. The Muonic Portal to Vector Dark Matter:connecting precision muon physics, cosmology, and colliders

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  9. Global Electroweak Fit Constraints on the Two-Higgs-Doublet Model in Light of the CDF W -Boson Mass

    hep-ph 2026-04 unverdicted novelty 5.0

    The CDF W mass anomaly can be accommodated in the 2HDM via enhanced ΔT from scalar mass splittings, yielding updated constraints on the model's parameter space from global electroweak fits.

  10. The anomalous magnetic moment of the muon in the Standard Model: an update

    hep-ph 2025-05 accept novelty 5.0

    The updated SM prediction for the muon anomalous magnetic moment is 116592033(62)×10^{-11}, showing no tension with the experimental average of 38(63)×10^{-11}.

  11. Global analysis of a minimally extended scotogenic model

    hep-ph 2026-06 unverdicted novelty 4.0

    Numerical scan of minimally extended scotogenic model constrains fermionic DM to 120-350 GeV and CP-odd scalar to 350-600 GeV while noting DESI BAO data may rule out inverted neutrino hierarchy.

  12. Comparison of the hadronic vacuum polarization between hadronic $\tau$-decay data and lattice QCD

    hep-ph 2026-05 unverdicted novelty 4.0

    Lattice QCD and tau-decay dispersive calculations of isospin-one HVP generally agree, except for a significant difference in the 2π−π+π0 four-pion mode contribution to window quantities.

  13. Spin effects in the tau-lepton pair induced by anomalous magnetic and electric dipole moments

    hep-ph 2026-02 unverdicted novelty 4.0

    Anomalous dipole moments of the tau lepton produce measurable effects on tau polarization and spin correlations in gamma-gamma and quark-antiquark induced pair production.

  14. Study of electron-positron annihilation into four pions within chiral effective field theory in the low energy region

    hep-ph 2025-05 unverdicted novelty 4.0

    Chiral effective field theory and resonance chiral theory yield cross sections for e+e- to four pions that are one to two orders smaller than data, with hadronic vacuum polarization contributions to (g-2)μ of (0.680±0...

  15. Global analysis of a minimally extended scotogenic model

    hep-ph 2026-06 unverdicted novelty 3.0

    Global analysis constrains fermionic DM to 120-350 GeV and CP-odd scalar to 350-600 GeV in a scotogenic extension, with DESI potentially ruling out inverted neutrino hierarchy and Z invisible width compatible with dat...

  16. The anomalous magnetic moment of the muon in the Standard Model

    hep-ph 2020-06 accept novelty 2.0

    The Standard Model value for the muon anomalous magnetic moment is 116591810(43)×10^{-11}, 3.7σ below the Brookhaven experimental measurement.